problem with the display manager

bdug · 2016-10-09 20:26:50

I installed a kali linux with xfce on an old eepc. It works fine except dual screen

If I boot without the external vga monitor plugged and then if after the login step I plug the vga monitor then I can successfully setup the extended display.

However If I reboot with the external monitor plugged then the laptop monitor will remain blank whatever I do, even if I unplug and replug the external monitor.

any help would be appreciated

Thx in advance

Last edited by bdug (2016-10-10 00:04:22)

ToZ · 2016-10-09 21:00:29

What version of Xfce does kali run and more specifically, which version of xfce4-settings? There have been a couple of bug fixes for external monitor issues in 4.12.1 (see: https://git.xfce.org/xfce/xfce4-settings/log/).

bdug · 2016-10-09 23:45:49

it is version 4.12

bdug · 2016-10-09 23:53:28

and xfce4-settings version is 4.12.1-1

ToZ · 2016-10-10 13:57:34

Perhaps you should file a bug report against xfce4-settings for this issue.

As for a workaround, does running:

xrandr --auto

...help with scenario #2?

If not, what does xrandr return when the VGA monitor is plugged in?

bdug · 2016-10-10 20:28:13

no effect at all
no value returned

I filed a bug

thx for your help

ToZ · 2016-10-10 21:07:45

bdug wrote:

no value returned

No response to "xrandr"? Not even an error message?? That's really odd. What graphics driver are you using?

bdug · 2016-10-11 02:41:39

no response at all not even an error message.

for the graphic driver I am not sure of where to look at.

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Atom Processor D2xxx/N2xxx Integrated Graphics Controller (rev 09)

egrep -i " connected|card detect|primary dev|Setting driver" /var/log/Xorg.0.log
[    22.754] (II) modeset(0): Output VGA-1 connected
[    22.754] (II) modeset(0): Output LVDS-1 connected

Last edited by bdug (2016-10-11 02:45:33)

ToZ · 2016-10-11 12:17:47

What does the following return?

lspci -v | grep -A10 VGA

bdug · 2016-10-11 18:17:27

lspci -v | grep -A10 VGA
00:02.0 VGA compatible controller: Intel Corporation Atom Processor D2xxx/N2xxx Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
	DeviceName:  Onboard IGD
	Subsystem: ASUSTeK Computer Inc. Atom Processor D2xxx/N2xxx Integrated Graphics Controller
	Flags: bus master, fast devsel, latency 0, IRQ 30
	Memory at dfc00000 (32-bit, non-prefetchable) [size=1M]
	I/O ports at f0e0 [size=8]
	[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [d0] Power Management version 2
	Capabilities: [b0] Vendor Specific Information: Len=07 <?>
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Kernel driver in use: gma500

ToZ · 2016-10-11 19:18:26

I'm by no means an expert on video cards/drivers, but your system is using the gma500 (poulsbo) driver. I believe you need to do some further configuration to get it to properly support xrandr and multiple monitors. Here are some references that I was able to locate:
- https://wiki.ubuntu.com/HardwareSupport … rdsPoulsbo
- https://wiki.archlinux.org/index.php/Intel_GMA_500
- http://forums.fedoraforum.org/showthread.php?t=286223

bdug · 2016-10-12 04:53:20

tyvm Toz but I dont want to enter into this since I would not know what I would be doing. I dont want to messup my system.
I found a manual workaround for dual screen to work: I switch on the external monitor after the boot sequence just before login in

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#1 2016-10-09 20:26:50

problem with the display manager

#2 2016-10-09 21:00:29

Re: problem with the display manager

#3 2016-10-09 23:45:49

Re: problem with the display manager

#4 2016-10-09 23:53:28

Re: problem with the display manager

#5 2016-10-10 13:57:34

Re: problem with the display manager

#6 2016-10-10 20:28:13

Re: problem with the display manager

#7 2016-10-10 21:07:45

Re: problem with the display manager

#8 2016-10-11 02:41:39

Re: problem with the display manager

#9 2016-10-11 12:17:47

Re: problem with the display manager

#10 2016-10-11 18:17:27

Re: problem with the display manager

#11 2016-10-11 19:18:26

Re: problem with the display manager

#12 2016-10-12 04:53:20

Re: problem with the display manager

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