Bug 1212467

Summary: i915 Xorg display flashing in 2k mode
Product: [openSUSE] openSUSE Tumbleweed Reporter: Michal Suchanek <msuchanek>
Component: KernelAssignee: openSUSE Kernel Bugs <kernel-bugs>
Status: RESOLVED WORKSFORME QA Contact: E-mail List <qa-bugs>
Severity: Normal    
Priority: P5 - None CC: patrik.jakobsson, tiwai, tzimmermann
Version: Current   
Target Milestone: ---   
Hardware: Other   
OS: Other   
Whiteboard:
Found By: --- Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---
Attachments: dmesg
X log
xrandr
dmesg
lshw
dmesg 5.14
working xrandr
X log again

Description Michal Suchanek 2023-06-17 08:03:05 UTC
Created attachment 867636 [details]
dmesg

every few seconds the display would flash

I suspect buffer swap synchronization error

Linux localhost.localdomain 6.3.8-lp154.2.g627a49e-default #1 SMP PREEMPT_DYNAMIC Wed Jun 14 10:30:38 UTC 2023 (627a49e) x86_64 x86_64 x86_64 GNU/Linux
Comment 1 Michal Suchanek 2023-06-17 08:33:08 UTC
Also on 5.14.21-150500.53-default
Comment 2 Michal Suchanek 2023-06-17 08:33:30 UTC
Created attachment 867644 [details]
X log
Comment 3 Michal Suchanek 2023-06-17 08:33:53 UTC
Created attachment 867645 [details]
xrandr
Comment 4 Michal Suchanek 2023-06-17 08:34:17 UTC
Created attachment 867646 [details]
dmesg
Comment 5 Michal Suchanek 2023-06-17 08:34:57 UTC
Created attachment 867647 [details]
lshw
Comment 6 Michal Suchanek 2023-06-17 08:38:09 UTC
Created attachment 867648 [details]
dmesg 5.14
Comment 7 Michal Suchanek 2023-06-17 08:50:14 UTC
The rendering artifact is a horizontal band a few hundred of pixels wide showing wrong content momentarily.
Comment 8 Andreas Stieger 2023-06-17 08:56:25 UTC
*** Bug 1212468 has been marked as a duplicate of this bug. ***
Comment 9 Michal Suchanek 2023-06-17 09:12:37 UTC
Created attachment 867649 [details]
working xrandr
Comment 10 Michal Suchanek 2023-06-17 09:13:48 UTC
Created attachment 867650 [details]
X log again
Comment 11 Michal Suchanek 2023-06-17 09:16:12 UTC
note that running the eDP internal display in native mode requires more bandwidth than driving the external display, and works perfectly
Comment 12 Michal Suchanek 2023-06-17 09:17:33 UTC
unless the external display is 10bit, and the card somehow supports that
Comment 13 Michal Suchanek 2023-11-27 18:12:03 UTC
No longer reproducible with Linux 6.5.7-lp155.4.g4e7c99b-default