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#1 2026-04-18 09:07:35
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Scanner not working
This isn't an XFCE specific question but hopefully someone could assist.
I'm running XFCE with debian trixie/sid.
There's an HP 4632 printer-scanner connected to the PC. I've installed hplip & simple-scan.
scanmage -L shows:
device `hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN' is a Hewlett-Packard Deskjet_4620_series all-in-one
However simple-scan doesn't work when I press "scan" there's an icon of wheel turning but nothing happens.
Any suggestions?
Thanks
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#2 2026-04-18 11:16:34
- eriefisher
- Wanderer
- From: ON, Canada
- Registered: 2008-10-25
- Posts: 947
Re: Scanner not working
I would suggest you install the sane packages.
But it's all right, when you're all in pain and you feel the rain come down
It's alright, when you find your way, then you see it disappear
It's alright....
Chris Cornell
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#3 2026-04-18 11:34:11
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
I would suggest you install the sane packages.
Thanks but they're already installed.
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#4 2026-04-18 13:55:05
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
However simple-scan doesn't work when I press "scan" there's an icon of wheel turning but nothing happens.
Any suggestions?
Anything in your log files?
Mark solved threads as [SOLVED] to make it easier for others to find solutions.
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#5 2026-04-18 14:17:59
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
jt1122 wrote:However simple-scan doesn't work when I press "scan" there's an icon of wheel turning but nothing happens.
Any suggestions?
Anything in your log files?
Here are entries from /var/log/syslog relevant to SANE:
2026-04-18T06:47:32.267777+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:47:32.267949+03:00 pc Thunar[2331626]: thunar-volman: Unsupported USB device type "(null)".
2026-04-18T06:47:32.268011+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:47:32.268059+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:51:22.874857+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:51:22.875677+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:51:22.875732+03:00 pc colord-sane: io/hpmud/musb.c 2101: Invalid usb_open: Permission denied
2026-04-18T06:52:45.966195+03:00 pc simple-scan: scan/sane/http.c 557: unable to write channel data
2026-04-18T06:53:26.275623+03:00 pc simple-scan: scan/sane/http.c 158: read_stream error stat=49
2026-04-18T06:53:26.276345+03:00 pc simple-scan: io/hpmud/musb.c 550: aborting outstanding ff/cc/0 write
2026-04-18T06:54:56.379333+03:00 pc adduser[2335115]: The user `saned' is already a member of `scanner'.Offline
#6 2026-04-18 16:08:10
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
Can you post back the output of:
simple-scan --debugMark solved threads as [SOLVED] to make it easier for others to find solutions.
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#7 2026-04-19 07:05:46
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
Can you post back the output of:
simple-scan --debug
Here's the output:
[+0.03s] DEBUG: simple-scan.vala:2016: Starting simple-scan 46.0, PID=2579680
[+0.30s] CRITICAL: g_application_set_application_id: assertion 'application_id == NULL || g_application_id_is_valid (application_>
[+0.31s] CRITICAL: g_variant_new_string: assertion 'string != NULL' failed
[+0.49s] DEBUG: _g_io_module_get_default: Found default implementation gvfs (GDaemonVfs) for ‘gio-vfs’
[+0.52s] DEBUG: Portal doesn't provide settings: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.fre>
[+0.52s] DEBUG: Portal doesn't provide settings: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.fre>
[+0.52s] DEBUG: Portal doesn't provide settings: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.fre>
[+0.52s] DEBUG: Portal doesn't provide settings: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.fre>
[+0.52s] DEBUG: _g_io_module_get_default: Found default implementation dconf (DConfSettingsBackend) for ‘gsettings-backend’
[+0.65s] DEBUG: app-window.vala:1436: Loading state from /home/pc/.config/simple-scan/state
[+0.67s] DEBUG: app-window.vala:1415: Restoring window to 1141x921 pixels
[+1.25s] DEBUG: scanner.vala:1619: sane_init () -> SANE_STATUS_GOOD
[+1.25s] DEBUG: scanner.vala:1625: SANE version 1.2.1
[+1.25s] DEBUG: scanner.vala:1686: Requesting redetection of scan devices
[+1.25s] DEBUG: scanner.vala:863: Processing request
[+2.46s] DEBUG: app-window.vala:1512: Saving state to /home/pc/.config/simple-scan/state
[+2.62s] DEBUG: app-window.vala:1512: Saving state to /home/pc/.config/simple-scan/state
[+11.45s] DEBUG: scanner.vala:348: sane_get_devices () -> SANE_STATUS_GOOD
[+11.45s] DEBUG: scanner.vala:374: Device: name="hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN" vendor="Hewlett-Packard" m>
[+11.57s] DEBUG: app-window.vala:1512: Saving state to /home/pc/.config/simple-scan/state Thanks
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#8 2026-04-19 10:53:31
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
Is that all there is in the debug log? It's odd that there is more info in your syslog snippet that doesn't appear here.
Does scanimage work?
scanimage --format=png --output-file test.png --progressDoes hp-scan work?
hp-scan -o document.pdfMark solved threads as [SOLVED] to make it easier for others to find solutions.
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#9 2026-04-19 11:12:08
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
Is that all there is in the debug log? It's odd that there is more info in your syslog snippet that doesn't appear here.
Does scanimage work?
scanimage --format=png --output-file test.png --progressDoes hp-scan work?
hp-scan -o document.pdf
here's the output of scanimage:
scanimage --format=png --output-file f.png
scanimage: sane_start: Device busyhere's for hp-scan:
hp-scan -o doc.pdf
/usr/bin/hp-scan:254: SyntaxWarning: invalid escape sequence '\*'
("Scan mode:", "-m<mode> or --mode=<mode>. Where <mode> is 'gray'\*, 'color' or 'lineart'.", "option", False),
/usr/bin/hp-scan:271: SyntaxWarning: invalid escape sequence '\*'
("", "where <units> is 'mm'\*, 'cm', 'in', 'px', or 'pt' ('mm' is default).", "option", False),
HP Linux Imaging and Printing System (ver. 3.22.10)
Scan Utility ver. 2.2
Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
Using device hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN
Opening connection to device...
Resolution: 300dpi
Mode: gray
Compression: JPEG
Scan area (mm):
Top left (x,y): (0.000000mm, 0.000000mm)
Bottom right (x,y): (215.900009mm, 297.010681mm)
Width: 215.900009mm
Height: 297.010681mm
Destination(s): file
Output file: /home/pc/doc.pdf
Warming up...
Scanning...
error: SANE: Device busy (code=3)
Closing device. Here are the entries for /var/log/syslog with "sane":
2026-04-19T06:07:19.268105+03:00 d1 simple-scan: scan/sane/http.c 557: unable to write channel data
2026-04-19T06:07:37.288422+03:00 d1 hp-scan: hp-scan[2660805]: error: SANE: Device busy (code=3)and with "scan":
2026-04-19T05:07:09.063219+03:00 pc simple-scan: io/hpmud/musb.c 427: Found interface conf=0, iface=1, altset=0, index=1
2026-04-19T05:07:09.179939+03:00 pc simple-scan: io/hpmud/musb.c 389: Active kernel driver on interface=1 ret=0
2026-04-19T05:07:09.180060+03:00 pc simple-scan: io/hpmud/musb.c 535: claimed 7/1/2 interface
2026-04-19T05:07:09.180158+03:00 pc simple-scan: io/hpmud/musb.c 781: read actual device_id successfully fd=1 len=499
2026-04-19T05:07:09.223559+03:00 pc simple-scan: io/hpmud/musb.c 561: released 7/1/2 interface
2026-04-19T05:07:09.223683+03:00 pc simple-scan: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T05:07:09.234290+03:00 pc simple-scan: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T05:07:09.234426+03:00 pc simple-scan: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T05:07:09.297811+03:00 pc simple-scan: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T05:07:09.349020+03:00 pc simple-scan: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T05:07:09.357934+03:00 pc simple-scan: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T05:07:09.385257+03:00 pc simple-scan: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T05:07:09.385372+03:00 pc simple-scan: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T05:07:09.385424+03:00 pc simple-scan: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T05:07:09.385474+03:00 pc simple-scan: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T05:07:09.389775+03:00 pc simple-scan: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T05:07:09.390042+03:00 pc simple-scan: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T05:07:09.390134+03:00 pc simple-scan: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T05:07:09.390185+03:00 pc simple-scan: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T05:07:09.390232+03:00 pc simple-scan: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T05:07:09.390292+03:00 pc simple-scan: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T05:07:19.268105+03:00 pc simple-scan: scan/sane/http.c 557: unable to write channel data
2026-04-19T06:05:35.904327+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=1, altset=0, index=1
2026-04-19T06:05:35.936259+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=1 ret=0
2026-04-19T06:05:35.936354+03:00 pc scanimage: io/hpmud/musb.c 535: claimed 7/1/2 interface
2026-04-19T06:05:35.947474+03:00 pc scanimage: io/hpmud/musb.c 781: read actual device_id successfully fd=1 len=499
2026-04-19T06:05:35.959251+03:00 pc scanimage: io/hpmud/musb.c 561: released 7/1/2 interface
2026-04-19T06:05:35.959342+03:00 pc scanimage: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:05:35.959463+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T06:05:35.971843+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T06:05:35.971918+03:00 pc scanimage: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T06:05:36.014376+03:00 pc scanimage: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T06:05:36.035706+03:00 pc scanimage: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T06:06:03.337581+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=1, altset=0, index=1
2026-04-19T06:06:03.359602+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=1 ret=0
2026-04-19T06:06:03.359676+03:00 pc scanimage: io/hpmud/musb.c 535: claimed 7/1/2 interface
2026-04-19T06:06:03.359731+03:00 pc scanimage: io/hpmud/musb.c 781: read actual device_id successfully fd=1 len=499
2026-04-19T06:06:03.359779+03:00 pc scanimage: io/hpmud/musb.c 561: released 7/1/2 interface
2026-04-19T06:06:03.359841+03:00 pc scanimage: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:06:03.372570+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T06:06:03.372674+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T06:06:03.372795+03:00 pc scanimage: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T06:06:03.442490+03:00 pc scanimage: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T06:06:03.453068+03:00 pc scanimage: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T06:07:37.142043+03:00 pc python3: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:07:37.223136+03:00 pc python3: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T06:07:37.224216+03:00 pc python3: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:07:37.288338+03:00 pc python3: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T06:07:37.288422+03:00 pc hp-scan: hp-scan[2660805]: error: SANE: Device busy (code=3)
2026-04-19T06:11:03.952424+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=1, altset=0, index=1
2026-04-19T06:11:04.035802+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=1 ret=0
2026-04-19T06:11:04.035966+03:00 pc scanimage: io/hpmud/musb.c 535: claimed 7/1/2 interface
2026-04-19T06:11:04.036114+03:00 pc scanimage: io/hpmud/musb.c 781: read actual device_id successfully fd=1 len=499
2026-04-19T06:11:04.048835+03:00 pc scanimage: io/hpmud/musb.c 561: released 7/1/2 interface
2026-04-19T06:11:04.048940+03:00 pc scanimage: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:11:04.049054+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T06:11:04.055232+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T06:11:04.055388+03:00 pc scanimage: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T06:11:04.056212+03:00 pc scanimage: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T06:11:04.066569+03:00 pc scanimage: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0
2026-04-19T06:11:04.066665+03:00 pc scanimage: io/hpmud/musb.c 961: new HP-LEDM-SCAN channel=24 clientCnt=1 channelCnt=1
2026-04-19T06:11:04.121282+03:00 pc scanimage: io/hpmud/musb.c 427: Found interface conf=0, iface=0, altset=0, index=11
2026-04-19T06:11:04.128565+03:00 pc scanimage: io/hpmud/musb.c 389: Active kernel driver on interface=0 ret=0
2026-04-19T06:11:04.128686+03:00 pc scanimage: io/hpmud/musb.c 535: claimed ff/cc/0 interface
2026-04-19T06:11:04.128752+03:00 pc scanimage: io/hpmud/musb.c 561: released ff/cc/0 interface
2026-04-19T06:11:04.128815+03:00 pc scanimage: io/hpmud/musb.c 976: removed HP-LEDM-SCAN channel=24 clientCnt=0 channelCnt=0 Last edited by jt1122 (2026-04-19 11:25:33)
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#10 2026-04-19 11:46:40
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
error: SANE: Device busy (code=3)
Are you a member of the scanner group on the computer?
And finally:
hp-check -tMark solved threads as [SOLVED] to make it easier for others to find solutions.
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#11 2026-04-19 11:56:53
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
I'm a member of "scanner".
Here's the output of hp-scan:
hp-check -t
/usr/bin/hp-check:630: SyntaxWarning: invalid escape sequence '\s'
lsusb_pat = re.compile("""^Bus\s([0-9a-fA-F]{3,3})\sDevice\s([0-9a-fA-F]{3,3}):\sID\s([0-9a-fA-F]{4,4}):([0-9a-fA-F]{4,4})(.*)">
Saving output in log file: /home/pc/m/gen/IL/postal_office/hp-check.log
HP Linux Imaging and Printing System (ver. 3.22.10)
Dependency/Version Check Utility ver. 15.1
Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.
Note: hp-check can be run in three modes:
1. Compile-time check mode (-c or --compile): Use this mode before compiling the HPLIP supplied tarball (.tar.gz or .run) to >
determine if the proper dependencies are installed to successfully compile HPLIP. >
2. Run-time check mode (-r or --run): Use this mode to determine if a distro supplied package (.deb, .rpm, etc) or an already bui>
HPLIP supplied tarball has the proper dependencies installed to successfully run. >
3. Both compile- and run-time check mode (-b or --both) (Default): This mode will check both of the above cases (both compile- an>
run-time dependencies). >
Check types: >
a. EXTERNALDEP - External Dependencies >
b. GENERALDEP - General Dependencies (required both at compile and run time) >
c. COMPILEDEP - Compile time Dependencies >
d. [All are run-time checks] >
PYEXT SCANCONF QUEUES PERMISSION
Status Types:
OK
MISSING - Missing Dependency or Permission or Plug-in
INCOMPAT - Incompatible dependency-version or Plugin-version
warning: debian-n/a version is not supported. Using debian-11 versions dependencies to verify and install...
---------------
| SYSTEM INFO |
---------------
Kernel: 6.6.15-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.15-2 (2024-02-04) GNU/Linux
Host: pc
Proc: 6.6.15-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.15-2 (2024-02-04) GNU/Linux
Distribution: debian n/a
Bitness: 64 bit
-----------------------
| HPLIP CONFIGURATION |
-----------------------
HPLIP-Version: HPLIP 3.22.10
HPLIP-Home: /usr/share/hplip
warning: HPLIP-Installation: Auto installation is not supported for debian distro n/a version
Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.
[hplip]
version=3.22.10
[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip
html=/usr/share/doc/hplip-doc
icon=no
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv
bin=/usr/bin
apparmor=/etc/apparmor.d
# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
libusb01-build=no
pp-build=no
gui-build=yes
scanner-build=yes
fax-build=yes
dbus-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
hpijs-install=yes
foomatic-drv-install=yes
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.22.10
restricted-build=no
ui-toolkit=qt5
qt3=no
qt4=no
qt5=yes
policy-kit=yes
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=no
class-driver=no
Current contents of '/var/lib/hp/hplip.state' file:
[plugin]
installed = 1
eula = 1
version = 3.22.10
Current contents of '~/.hplip/hplip.conf' file:
[commands]
scan = /usr/bin/simple-scan %SANE_URI%
[fax]
email_address =
voice_phone =
[last_used]
device_uri = hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN
printer_name =
working_dir = .
[polling]
device_list =
enable = false
interval = 5
[refresh]
enable = false
rate = 30
type = 1
[settings]
systray_messages = 0
systray_visible = 0
[upgrade]
last_upgraded_time = 1689355927
notify_upgrade = false
pending_upgrade_time = 0
[installation]
date_time = 04/19/26 14:48:58
version = 3.22.10
<Package-name> <Package-Desc> <Required/Optional> <Min-Version> <Installed-Version> <Status> <Comment>
-------------------------
| External Dependencies |
-------------------------
error: cups CUPS - Common Unix Printing System REQUIRED 1.1 -
gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 10.03.1>
xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 >
scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.2.1 >
dbus DBus - Message bus system REQUIRED - 1.16.2 >
policykit PolicyKit - Administrative policy framework OPTIONAL - - >
network network -wget OPTIONAL - 1.21.4 >
avahi-utils avahi-utils OPTIONAL - 0.8 >
------------------------
| General Dependencies |
------------------------
libjpeg libjpeg - JPEG library REQUIRED - - >
cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - - >
cups-image CUPS image - CUPS image development files REQUIRED - - >
libpthread libpthread - POSIX threads library REQUIRED - b'2.42' >
libusb libusb - USB library REQUIRED - 1.0 >
sane SANE - Scanning library REQUIRED - - >
sane-devel SANE - Scanning library development files REQUIRED - - >
libavahi-dev libavahi-dev REQUIRED - - >
libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.9.5 >
libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 3.5.0 >
python3X Python 2.2 or greater - Python programming language REQUIRED 2.2 3.13.3 >
python3-notify2 Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - >
error: python3-pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 OPTIONAL 4.0 - >
error: python3-pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 -
python3-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.4.0 >
python3-xml Python XML libraries REQUIRED - 2.7.1 >
python3-devel Python devel - Python development files REQUIRED 2.2 3.13.3 >
python3-pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - >
python3-reportlab Reportlab - PDF library for Python OPTIONAL 2.0 4.1.0 >
--------------
| COMPILEDEP |
--------------
libtool libtool - Library building support services REQUIRED - 2.5.4 >
gcc gcc - GNU Project C and C++ Compiler REQUIRED - 13.2.0 >
make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.3 >
---------------------
| Python Extentions |
---------------------
cupsext CUPS-Extension REQUIRED - 3.22.10 >
hpmudext IO-Extension REQUIRED - 3.22.10 >
----------------------
| Scan Configuration |
----------------------
'/etc/sane.d/dll.d/hpaio' not found.
hpaio HPLIP-SANE-Backend REQUIRED - 3.22.10 >
scanext Scan-SANE-Extension REQUIRED - 3.22.10 >
------------------------------
| DISCOVERED SCANNER DEVICES |
------------------------------
device `hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN' is a Hewlett-Packard Deskjet_4620_series all-in-one
device `hpaio:/usb/Deskjet_4620_series?serial=CN29K211MV05TN' is a Hewlett-Packard Deskjet_4620_series all-in-one
--------------------------
| DISCOVERED USB DEVICES |
--------------------------
Device URI Model
------------------------------------------------- --------------------------
hp:/usb/Deskjet_4620_series?serial=CN29K211MV05TN HP Deskjet 4620 series
---------------------------------
| INSTALLED CUPS PRINTER QUEUES |
---------------------------------
Deskjet_4620
Type: Printer
Device URI: hp:/usb/Deskjet_4620_series?serial=CN29K211MV05TN
PPD: /etc/cups/ppd/Deskjet_4620.ppd
warning: Failed to read /etc/cups/ppd/Deskjet_4620.ppd ppd file
PPD Description:
Printer status: printer Deskjet_4620 is idle. enabled since Sat 18 Apr 2026 12:49:00
Communication status: Good
Deskjet_4620_fax
----------------
Type: Fax
Device URI: hpfax:/usb/Deskjet_4620_series?serial=CN29K211MV05TN
PPD: /etc/cups/ppd/Deskjet_4620_fax.ppd
warning: Failed to read /etc/cups/ppd/Deskjet_4620_fax.ppd ppd file
PPD Description:
Printer status: printer Deskjet_4620_fax is idle. enabled since Sat 18 Apr 2026 12:49:00
Communication status: Good
HP_DeskJet_4670_series
----------------------
Type: Unknown
Device URI: usb://HP/DeskJet%204670%20series?serial=TH65O390JB0663&interface=1
PPD: /etc/cups/ppd/HP_DeskJet_4670_series.ppd
warning: Failed to read /etc/cups/ppd/HP_DeskJet_4670_series.ppd ppd file
PPD Description:
Printer status: printer HP_DeskJet_4670_series is idle. enabled since Fri 31 Mar 2023 19:44:05
warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend for HP-Devices.
--------------
| PERMISSION |
--------------
USB Deskjet_4620 Required - - OK Node:'/dev/bus/usb/001/004' Perm:' roo>
-----------
| SUMMARY |
-----------
Missing Required Dependencies
-----------------------------
error: 'cups' package is missing or 'cups' service is not running.
error: 'libcups2' package is missing/incompatible
error: 'python3-pyqt4' package is missing/incompatible
error: 'gtk2-engines-pixbuf' package is missing/incompatible
Missing Optional Dependencies
-----------------------------
error: 'python3-dbus.mainloop.qt' package is missing/incompatible
Total Errors: 3
Total Warnings: 1
Done. Offline
#12 2026-04-19 15:09:15
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
error: 'cups' package is missing or 'cups' service is not running.
Is cups installed and running?
Here is the Debian wiki page on scanning. There is a section there on HP AIOs that might yield some useful information.
Mark solved threads as [SOLVED] to make it easier for others to find solutions.
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#13 2026-04-19 18:58:59
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
jt1122 wrote:error: 'cups' package is missing or 'cups' service is not running.
Is cups installed and running?
Here is the Debian wiki page on scanning. There is a section there on HP AIOs that might yield some useful information.
Thanks. CUPS is running (it's available on http://localhost:631 ).
Nothing in the debug logs which can suggest what's wrong?.
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#14 2026-04-19 20:10:01
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
Nothing in the debug logs which can suggest what's wrong?.
error: SANE: Device busy (code=3)Apparently, the device is busy. Something has it tied up. Also:
error: cups CUPS - Common Unix Printing System REQUIRED 1.1 - ...and:
error: 'cups' package is missing or 'cups' service is not running. ...hp-scan is not picking up cups as installed.
From the link I posted:
HP all-in-one (aio) Machines
A backend for these devices is developed and supported by HP via HPLIP. The backend is named hpaio and is listed in the file hplip in /etc/saned/dll.d when libsane-hpaio is installed. Device detection support is provided by /lib/udev/rules.d/56-hpmud.rules, which is in the libsane-hpaio package. Be aware that not all aios support scanning from a computer over USB or the network.
The straightforward way to employ hpaio and 56-hpmud.rules is to install hplip and its recommended dependencies and create a print queue with hp-setup. This way leads to an automatic setup of the scanner because its device URI is derived from the USB printer URI by replacing hp:/... with hpaio:/.... Having hplip on the system also makes it easier to install a non-free plugin with hp-plugin if the scanner needs one.
As a matter of interest, all that is really needed for scanning with an aio scanner is the libsane-hpaio package, installed without its recommended packages, and, if necessary, a way to install a non-free plugin
Is libsane-hpaio installed?
What are the contents of /etc/saned/dll.d/hplip?
What are the contents of /etc/saned/dll.d/hpaio?
Did you use hp-setup?
Regarding cups, can you post back:
systemctl status cupsMark solved threads as [SOLVED] to make it easier for others to find solutions.
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#15 Yesterday 08:25:27
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
Is libsane-hpaio installed?
What are the contents of /etc/saned/dll.d/hplip?
What are the contents of /etc/saned/dll.d/hpaio?
Did you use hp-setup?
Regarding cups, can you post back:
systemctl status cups
regarding libsane-hpaio:
dpkg -L libsane-hpaio
/.
/etc
/etc/hp
/etc/hp/hplip.conf
/etc/sane.d
/etc/sane.d/dll.d
/etc/sane.d/dll.d/hplip
/usr
/usr/lib
/usr/lib/udev
/usr/lib/udev/rules.d
/usr/lib/udev/rules.d/56-hpmud.rules
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/sane
/usr/lib/x86_64-linux-gnu/sane/libsane-hpaio.so.1.0.0
/usr/share
/usr/share/doc
/usr/share/doc/libsane-hpaio
/usr/share/doc/libsane-hpaio/changelog.Debian.gz
/usr/share/doc/libsane-hpaio/copyright
/usr/share/doc/libsane-hpaio/hpaio.desc.gz
/usr/share/hplip
/usr/share/hplip/data
/usr/share/hplip/data/models
/usr/share/hplip/data/models/models.dat
/usr/share/lintian
/usr/share/lintian/overrides
/usr/share/lintian/overrides/libsane-hpaio
/usr/lib/x86_64-linux-gnu/sane/libsane-hpaio.so.1the contents of hplip:
c /etc/sane.d/dll.d/hplip
# dll.conf snippet for hplip
#
hpaioregarding
/etc/saned/dll.d/hpaio- it doesn't exist
I've used hp-setup to set a printer & a fax queue.
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#16 Yesterday 09:39:26
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
systemctl status cups?
Mark solved threads as [SOLVED] to make it easier for others to find solutions.
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#17 Yesterday 09:56:39
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
systemctl status cups?
systemctl staus cups
● cups.service - CUPS Scheduler
Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled; preset: enabled)
Active: active (running) since Mon 2026-04-20 10:20:40 IDT; 2h 34min ago
Invocation: 703686ca1cbd4c7498b0409377d80990
TriggeredBy: ● cups.socket
Docs: man:cupsd(8)
Main PID: 2842584 (cupsd)
Status: "Scheduler is running..."
Tasks: 1 (limit: 9113)
Memory: 2.8M (peak: 3.4M)
CPU: 53ms
CGroup: /system.slice/cups.service
└─2842584 /usr/sbin/cupsd -lI thought of reintalling hplip but
apt-cache search hplipfinds nothing.
Last edited by jt1122 (Yesterday 13:44:48)
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#18 Yesterday 14:45:01
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
It does exist though: https://packages.debian.org/sid/hplip.
What is installed?
apt-cache policy hplipMark solved threads as [SOLVED] to make it easier for others to find solutions.
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#19 Yesterday 14:47:47
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
It does exist though: https://packages.debian.org/sid/hplip.
What is installed?
apt-cache policy hplip
hplip:
Installed: (none)
Candidate: (none)
Version table:Nothing is there since I just now "apt purgeed" it in order to reinstall but now apt cache doesn't find it.
The scanner issues were there before I purged hplip.
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#20 Yesterday 14:55:21
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
If you haven't already done so, update the apt cache:
apt-get updateMaybe also look at your repo sources and/or use a different mirror.
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#21 Yesterday 15:59:54
- jt1122
- Member
- Registered: 2021-03-26
- Posts: 269
Re: Scanner not working
If you haven't already done so, update the apt cache:
apt-get updateMaybe also look at your repo sources and/or use a different mirror.
Thanks. This is my /etc/apt/sources.list:
deb http://deb.debian.org/debian testing main contrib non-free
deb-src http://deb.debian.org/debian testing main contrib non-free
deb http://deb.debian.org/debian-security testing-security/updates main contrib non-free
deb-src http://deb.debian.org/debian-security testing-security/updates main contrib non-free
deb http://deb-multimedia.org testing main non-freerunning apt update && apt-cache search hplip returns:
openprinting-ppds - OpenPrinting printer support - PostScript PPD files
printer-driver-pxljr - printer driver for HP Color LaserJet 35xx/36xx
hplip-data - HP Linux Printing and Imaging - data files
libhpmud0 - HP Multi-Point Transport Driver (hpmud) run-time libraries
printer-driver-hpcups - HP Linux Printing and Imaging - CUPS Raster driver (hpcups)Offline
#22 Yesterday 16:14:59
- ToZ
- Administrator
- From: Canada
- Registered: 2011-06-02
- Posts: 12,562
Re: Scanner not working
Ahhh. It looks like it was removed from testing. This might explain why you are having issues - this package appears to cause regressions.
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