Bug 441991

Summary:	screenshot problem on Intel TGL/X11
Product:	[Plasma] kwin	Reporter:	Guido <guido.iodice>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	guido.iodice, nate
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Guido 2021-09-04 10:51:42 UTC

SUMMARY
When I use Intel DDX driver (xf86-video-intel) instead of modesetting screenshots take a "old" screen. All is ok with modesetting. The problem does not depends on screenshot software (I tried a lot of them). The problem seems to emerge with Intel Tiger Lake GPU.


STEPS TO REPRODUCE
1. Configure Xorg to use "intel" DDX driver
2. Start a session, open some programs/windows, than try to take a screenshot


OBSERVED RESULT
Screenshot is taken from a "previous" screen.


EXPECTED RESULT
Screenshot is taken from the actual screen.

Comment 1 Guido 2022-11-04 18:01:16 UTC

I finda workaround (thanks to KDE forum).

In System settings > Display and Monitor > Compositor change Keep window thumbnails from Only from Shown windows to Never.

Could this bug be investigated? I know the Intel driver is deprecated, but SNA acceleration is still much better than glamour and I notice a big difference especially in certain applications like Libreoffice, so I still prefer the Intel driver over modesetting.

Comment 2 Guido 2022-11-04 18:12:57 UTC

a kind bump for this bug (sorry)

Comment 3 Guido 2023-01-09 19:11:38 UTC

Workaround:

In Xorg.conf:

Section "Device"
  Identifier "Intel Graphics"
  Driver "intel"
  Option "DRI" "iris"
EndSection

In KDE: disable thumbnails in compositor

Comment 4 Guido 2024-05-17 15:35:38 UTC

Intel DDX driver is unmaintaned now. Meanwhile the modesetting DDX driver has improved considerably (In particular, I recommend installing xorg-server from git) and with this driver the problem does not occur.