If it's trending to be caused by PSR (which it sounds like it is), try to
revert this patch:
https://github.com/torvalds/linux/commit/751281c55579f0cb0e56c9797d4663f689909681
> Short, massive flickering while running with parameters
"amdgpu.dcdebugmask=0x10 amdgpu.sg_display=0",
Have a try with
** Attachment added: "PXL_20230406_120734843.jpg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2009952/+attachment/5661609/+files/PXL_20230406_120734843.jpg
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Short, massive flickering while running with parameters
"amdgpu.dcdebugmask=0x10 amdgpu.sg_display=0", see video:
https://www.youtube.com/watch?v=7WPtMy1nrT8
I suspect this is a separate issue, as I have not seen flickering on
this scale before, it used to be a very quick, hardly noticeable tear.
Test 2, no external monitor connected
Another system halt with the following error:
Apr 6 12:51:59 rct14s kernel: [11686.738468] amdgpu :33:00.0: [drm]
*ERROR* [CRTC:72:crtc-0] flip_done timed out
I am now re-enabling "amdgpu.dcdebugmask=0x10" since that seemed to be
running quite well.
Test 1: amdgpu.dcdebugmask=0x10 amdgpu.sg_display=0
All well, no observations during a full workday.
Test 2: amggpu.sg_display=0
Flicker/tear is back, and a full screen freeze within 10 minutes.
About the screen freeze: contrary to yesterday the laptop was now
connected to a second screen. I
Hi Mario, thanks for your support!
I will test the following kernel parameter settings and report back:
Test 1: amdgpu.dcdebugmask=0x10 amdgpu.sg_display=0 (running now)
Test 2: amggpu.sg_display=0
Cheers,
Roemer
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There are potentially two bugs at play here. One with scatter/gather
and one for PSR. They both manifest really similarly, so let's try with
both disabled.
There is a parameter that is introduced in 6.3 for amdgpu.sg_display.
Can you please explicitly set that to "0" along with the PSR disable
I've tried 6.3rc5 (6.3.0-060300rc5-generic) without the parameter, and
the flickering is still there at times. It appears to be a lot less than
on 6.1/6.2 (without parameter set), though that's a very subjective
observation.
@Mario: Is there anything I can do to analyze further?
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I do think a double check against 6.3-rc4 would be worthwhile with no
parameters set.
The upstream issue is a bit confusing because it has both PSR and S/G
issues conflated.
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We probably don't need the confusing Invalid status on linux-oem-6.1
when that only exists for jammy.
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https://bugs.launchpad.net/bugs/2009952
Title:
[amdgpu][psr]
@Timo: I tried 6.1.21 recently, and an older 6.2 mainline kernel
(6.2.2?) from the kernel-ppa. The screen flicker/ tearing was still
present on both.
As a whole the system appeared somewhat unstable (occasional system
halt), but I did not investigate, just went back to linux-oem-6.1.
Should it
ah sorry, missed that this was already filed upstream and still
unresolved.. so the mainline builds probably won't help you
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do you see this with a mainline 6.2 or 6.3rc build?
https://kernel.ubuntu.com/~kernel-ppa/mainline/
** No longer affects: linux-meta-oem-6.1 (Ubuntu)
** Also affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.1 (Ubuntu)
Status:
** Summary changed:
- Screen flickering/ tearing on 6.1 kernel
+ [amdgpu][psr] Screen flickering/ tearing on 6.1 kernel
** Tags added: psr
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