Fellow Debian users: I need help diagnosing an issue to be able to, at least, file a proper bug report.
Sometimes after unlocking my desktop I'm met by a blank screen with just a cursor. I can move the cursor and switch to another TTY, but that's about it. I fix it by restarting lightdm.
I had initially thought it was a bug in my locking app, light-locker, but I now replaced it with xfce4-screensaver and the bug still occurs. I have looked at X, lightdm and light-locker's logs but none of them show errors.
I appreciate any clue on where to look to diagnose the issue. It only happens after unlocking (not when logging in) and I'm running an up-to-date Debian testing with lightdm and Xfce.
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[SOLVED] Blank screen with visible cursor after unlocking
- Head_on_a_Stick
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Re: Blank screen with visible cursor after unlocking
Check the systemd journal and ~/.xsession-errors.
It sounds like your graphics drivers are bugging out, what are you using?
And if this is testing then it could just be a SNAFU. The development branches are like that sometimes. Users of testing are expected to be able to dig into such issues themselves, if you can't do that then stick to stable instead.
It sounds like your graphics drivers are bugging out, what are you using?
And if this is testing then it could just be a SNAFU. The development branches are like that sometimes. Users of testing are expected to be able to dig into such issues themselves, if you can't do that then stick to stable instead.
deadbang
Re: Blank screen with visible cursor after unlocking
Ah, thanks, I was thinking this was related to the locker itself or maybe lightdm. It's a Thinkpad X230t with intel graphics. This is the output of lshw -c display:It sounds like your graphics drivers are bugging out, what are you using?
Code: Select all
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:32 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:6000(size=64) memory:c0000-dffff
Yes, I know. I've been using testing for many years and that's usually the case, except when it comes to video or X. At least now I'm headed in the right direction. Thank you.Users of testing are expected to be able to dig into such issues themselves
- Head_on_a_Stick
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Re: Blank screen with visible cursor after unlocking
Are you sure? I think bullseye defaults to the modesetting driver for Intel cards now. If it is running the Intel DDX driver then try swapping to the modesetting driver, or vice versa.lufte wrote:The driver is xserver-xorg-video-intel
deadbang
Re: Blank screen with visible cursor after unlocking
Yeah, I read in the package description that this driver is no longer recommended but I tried uninstalling it and X won't start. I assumed the other driver (modesetting?) was installed by default but maybe that's not the case. I will investigate this further and try using the driver you recommend.
- Head_on_a_Stick
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Re: Blank screen with visible cursor after unlocking
The modesetting DDX driver is provided by the xserver-xorg-core package, which should already be installed.lufte wrote:I assumed the other driver (modesetting?) was installed by default but maybe that's not the case.
If X failed to start after you removed xserver-xorg-video-intel then check if you have any X.Org configuration files that may be attempting to force it. Otherwise check the X.Org log to see why it failed.
FWIW the modesetting driver can be used even with xserver-xorg-video-intel installed by creating a configuration file:
Code: Select all
# /etc/X11/xorg.conf.d/20-modesetting.conf
Section "Device"
Identifier "Device0"
Driver "modesetting"
EndSection
deadbang
Re: Blank screen with visible cursor after unlocking
I did indeed have a configuration file which set the "intel" driver. I now removed that file, uninstalled the xserver-xorg-video-intel package, and X starts normally . I haven't been able to reproduce the issue although it was kind of random, so I'm going to give it some time, but maybe this was it.
Thank you for your help. I'll mark the issue as solved if the bug doesn't come up during the next days.
Thank you for your help. I'll mark the issue as solved if the bug doesn't come up during the next days.