The same issue on ubuntu 20.04(5.13.0-30) on Yoga slim 9 14ITL
Putting "i915.enable_psr=0" to GRUB_CMDLINE_LINUX_DEFAULT fixed issues
such as rendering, screen tearing, delaying.
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** Tags added: psr
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https://bugs.launchpad.net/bugs/1937072
Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws
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I had exact same issue on ubuntu 20.04 with same system "lenovo yoga slim7
14IIL05"
Putting "i915.enable_psr=0" to GRUB_CMDLINE_LINUX_DEFAULT fixed issues such as
rendering, screen tearing, delaying.
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Please file a bug against Intel graphics:
https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs
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https://bugs.launchpad.net/bugs/1937072
Title:
[Lenovo Yoga Slim 7
Thanks for doing that.
It would seem the only fix is still 'i915.enable_psr=0' so please
continue using that.
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Title:
[Lenovo Yoga Slim 7
Linux YOGA 5.14.0-051400rc5drmtip20210809-generic #202108082205 SMP Mon
Aug 9 02:21:27 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
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Title:
[Lenovo
OK, please verify the kernel version you're seeing the glitch in by
running:
uname -a
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes
Now I am able to boot into ubuntu in normal mode but there is screen
glitch problem.
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete
I have installed both files, Now what to do??
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws
To manage notifications
Yes we know. Recovery mode works by disabling performance and power
saving features so it will work around this bug. But that's not relevant
to actually fixing the bug. Nobody should stay in recovery mode long
term.
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before Testing one thing I want to tell you I won't able to boot in
ubuntu in normal mode but in recovery mode there is no issue related to
screen tearing
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You need to download at least two files:
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-
tip/2021-08-09/amd64/linux-image-
unsigned-5.14.0-051400rc5drmtip20210809-generic_5.14.0-051400rc5drmtip20210809.202108082205_amd64.deb
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-
Can you tell me in brief how to test drm-tip kernal and disble PSR2
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws
Mainly to test "drm/i915/display: Disable PSR2 if TGL Display stepping
is B1 from A0", though the CPU seems to be ICL.
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Title:
[Lenovo Yoga Slim
I'm not sure we need to bother with the above. We already know PSR is
the cause of the problem. I was assuming it just needs to be blacklisted
for this machine... unless it can be *fixed* somehow in later kernels
without being disabled?
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Please test latest drm-tip kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
Headers are not needed.
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Title:
[Lenovo Yoga
** Tags added: focal
** Also affects: linux-hwe-5.11 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-hwe-5.11 (Ubuntu)
Importance: Undecided => High
** Changed in: linux-hwe-5.11 (Ubuntu)
Status: New => Triaged
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