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zord

Member

Registered: 2023-10-12

Posts: 10

Compositor frozen on startup in KDE Plasma

Greetings.

This is a continuation from https://bbs.archlinux.org/viewtopic.php?id=289436.
I am running a Dell Precision 7550 with dual Intel and Nvidia GPUs and the proprietary Nvidia drivers. I use KDE Plasma with X11.

When I start the laptop, certain apps won't start properly, they show up only as transparent frames. Examples of apps affected in this way include System Settings, Dolphin, and pavucontrol-qt. Other apps like Firefox and Alacritty work as expected.
This seems to be due to the compositor being frozen, as suspending and resuming it (SHIFT+Alt+F12 twice) returns normal function to all windows until the next boot.

Here is the output of xwininfo on one of the affected apps

xwininfo: Window id: 0x360000c "Home — Dolphin"

  Absolute upper-left X:  589
  Absolute upper-left Y:  214
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1112
  Height: 674
  Depth: 24
  Visual: 0x792
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x360000b (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +589+214  -219+214  -219-192  +589-192
  -geometry 1112x674+589+214

In the last thread, we uninstalled the xf86-video-intel and removed the xorg.conf file. If any more information is needed, please just ask.

Thanks,
Simon

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,844

Re: Compositor frozen on startup in KDE Plasma

It's not an ARGB window - are the affected clients somehow autostarted?
Does resizing the window (instead of toggling the compositor) help as well?
Is this only after booting or also when logging out and back in?

qdbus org.kde.KWin /KWin supportInformation

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

zord

Member

Registered: 2023-10-12

Posts: 10

Re: Compositor frozen on startup in KDE Plasma

are the affected clients somehow autostarted?

I don't think so. I have not set any of them to be autostarted and I can find no mention of them being autostarted by systemd, SDDM, or Plasma.

Does resizing the window (instead of toggling the compositor) help as well?

No, resizing produces no change.

Is this only after booting or also when logging out and back in?

Logging out and back in has the same effect as rebooting, the problem reappears.

qdbus org.kde.KWin /KWin supportInformation

https://0x0.st/H4tj.txt

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,844

Re: Compositor frozen on startup in KDE Plasma

Try to disable the blur and contrast effects and see whether the issue remains.
Probaly a bug in kwin, but you ideally can narrow it down a bit before reporting it upstream.

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

zord

Member

Registered: 2023-10-12

Posts: 10

Re: Compositor frozen on startup in KDE Plasma

Disabling blur and contrast produce no change.

Excuse the additional questions from a newbie, but would reporting this upstream be done at https://bugs.kde.org/?

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 73,844

Re: Compositor frozen on startup in KDE Plasma

Yes, that's the KDE bugtracker.
Are all KDE/Qt based applications affected (and no other)?
Did you try to change the Qt style?

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc