#993608 xfce4: blank screen after login after changing resolution

Package:
xfce4
Source:
xfce4
Submitter:
Claude Heiland-Allen
Date:
2021-09-23 09:24:03 UTC
Severity:
normal
#993608#5
Date:
2021-09-03 15:56:04 UTC
From:
To:
Dear Maintainer,

   * What led up to the situation?

I installed Debian 11.0 amd64 netinst in a QEMU virtual machine.
I deselected GNOME and selected XFCE4.

On first boot, after login, I changed screen resolution to 1440x900
using XFCE4 display settings user interface.

The display was fine at the new resolution until the next time I started
the virtual machine, at which point after LightDM login the screen went
black (at the 1440x900 size).

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

I created a new user which allowed me to log in graphically, but the
default video resolution is tiny and unsuitable for what I need the VM for.

   * What outcome did you expect instead?

I expected the desktop still to work after a reboot.


Thanks for any help,


Claude
#993608#10
Date:
2021-09-03 16:01:28 UTC
From:
To:
More information:

I am starting QEMU like this:

qemu-system-x86_64 \
-m 8G -hda hda.img -cpu host -accel kvm -smp 8 \
-vga virtio -display gtk,gl=on,show-cursor=on \
-usb -device usb-tablet \
-audiodev id=pa,driver=pa,in.frequency=44100,out.frequency=44100 \
-device intel-hda -device hda-duplex,audiodev=pa

The host is running Bullseye (previously testing), configured with
amdgpu (OpenGL 4.6) and PipeWire.
#993608#15
Date:
2021-09-23 09:10:33 UTC
From:
To:
ctrl-alt-f1" then login and run

|xfconf-query -c xfwm4 -p /general/vblank_mode -s xpresent||
sudo service lightdm restart
||
[1] https://gitlab.com/postmarketOS/pmaports/-/issues/368

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