[Resolved]External Monitor HDMI not Recognized

Gotit · 2020-12-27 01:37:31

Hi - I'm on Arch and just performed an update and now my external monitor is not recognized on the HDMI port.

I tried rolling back XFCE-settings and XFCE4-Power-manager (is it was a big jump 1.6 > 4.16), but no good.
I looked at xandr before and after connecting the HDMI cable and it's the same in both cases:

$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 170mm
   1920x1080     60.01*+  59.93  
   1680x1050     59.88  
   1400x1050     59.98  
   1600x900      60.00    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1368x768      60.00    59.88    59.85  
   1280x800      59.81    59.91  
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   640x360       59.84    59.32    60.00  
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

I looked at display setting editor and HDMI shows active my external monitor is listed.

I've tried restarting with and without the HDMI cable connected, no difference.

$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08)
00:13.0 Non-VGA unclassified device: Intel Corporation Sunrise Point-LP Integrated Sensor Hub (rev 21)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1)
00:1e.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO UART Controller #0 (rev 21)
00:1e.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO SPI Controller #0 (rev 21)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
02:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)

Also tried logging in as a different user, again no good, HDMI not recognized

Not suer where to go from here?

Last edited by Gotit (2020-12-27 16:52:30)

ToZ · 2020-12-27 11:22:41

Xrandr isn't even recognizing your hdmi, and Xfce uses libxrandr. Maybe try another hdmi cable?

Gotit · 2020-12-27 15:28:37

Hi ToZ - the cable's new and works with other laptops. My HDMI was working through the update and then I re-started my laptop after the update for good measure. No good deed...

Also, I tried booting the LTS kernel, but still NG.
Also, reinstalled libxrandr, still NG.

Gotit · 2020-12-27 16:45:44

OK, not sure what happened...
I was attempting to boot from a live USB to verify my HDMI port still worked with another OS. I never got it to boot to the USB, but when I let my laptop boot into Arch, HDMI is working again.

I like the new Display configuration panel. Nice that it has custom scaling. Only thing is, the Advanced tab does not show my old profiles. If I try to save a new profile with the same old name, it says that profile already exists, but it doesn't show. So I modified the name of the old profile in:

/home/gotit/.config/xfce4/xfconf/xfce-perchannel-xml/displays.xml

I could then name my new profile with the same old name (Extend Top) after a restart.

So, I guess this thread can be marked "Resolved" but not "Solved".

Last edited by Gotit (2020-12-27 16:46:47)

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#1 2020-12-27 01:37:31

[Resolved]External Monitor HDMI not Recognized

#2 2020-12-27 11:22:41

Re: [Resolved]External Monitor HDMI not Recognized

#3 2020-12-27 15:28:37

Re: [Resolved]External Monitor HDMI not Recognized

#4 2020-12-27 16:45:44

Re: [Resolved]External Monitor HDMI not Recognized

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