KDE severe flickering GUI with intel graphics

phalange

Active Member

Reaction score: 79
Messages: 187

Running 12.1 with quarterly packages (just updated)

T470s with intel graphics. Running drm-kmod and xf86-video-intel, and rc.conf has kld_list="/boot/modules/i915kms.ko"

Also xorg.conf has
Code:
Section "Device"
        Identifier  "Card0"
        Driver "intel"
        Option "AccelMethod" "sna"
        Option "TearFree" "true"
EndSection

The flicker happens any time I mouse over a KDE GUI element, like the panel or the popup menus. It does not happen with running apps. Only KDE elements.

Any ideas where to start troubleshooting this?
 

bsduck

Member

Reaction score: 21
Messages: 30

If you use drm-kmod you don't need xf86-video-intel neither those lines in xorg.conf.
I suggest you to get rid of them.
 
OP
P

phalange

Active Member

Reaction score: 79
Messages: 187

If you use drm-kmod you don't need xf86-video-intel neither those lines in xorg.conf.
I suggest you to get rid of them.
Thanks for spotting this, I eliminated KDE from this system so I can't test without re-installing. However I can confirm that removing those lines from xorg.conf and removing xf86-video-intel was ok. The system works without them.

I'm not sure I'm ready to get involved with installing KDE again. I was also hitting a very irritating gpg wallet issue, see Thread 78396 and possibly Thread 73386.
 

Mjölnir

Daemon

Reaction score: 1,103
Messages: 1,578

T470s with intel graphics. Running drm-kmod and xf86-video-intel, and rc.conf has kld_list="/boot/modules/i915kms.ko". Also xorg.conf has
Code:
[...]
        Option "AccelMethod" "sna" [...]

The flicker happens any time I mouse over a KDE GUI element, like the panel or the popup menus. It does not happen with running apps. Only KDE elements.

Any ideas where to start troubleshooting this?
1. It is not recommended to have a custom xorg.conf(5); if one fiddles around with, at least please RTFM. Better let Xorg(1) do it's automagic configuration.
2. From intel(4) (bold and italics to highlight what relates to your issue):
  • Option "AccelMethod" "string"
    [...] "UXA" (Unified Acceleration Architecture) is the mature backend that was introduced to support the GEM driver model. It is in the process of being superseded by "SNA" (Sandybridge's New Acceleration). Until that process is complete,...
Translation for consumers: the SNA accelerator is not stable yet.
 
Top