** 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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Please test latest drm-tip kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
Headers are not needed.
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https://bugs.launchpad.net/bugs/1937072
Title:
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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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:
[Leno
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 scree
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-
tip/2021-08-09/a
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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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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I have installed both files, Now what to do??
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws
Status in l
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
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 ca
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:
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
Please file a bug against Intel graphics:
https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs
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Title:
[Lenovo Yoga
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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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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** Tags added: psr
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Title:
[Lenovo Yoga Slim 7 14IIL05] PSR causes incomplete screen redraws
Status in linux package in Ubuntu:
T
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