I also have a Latitude 9430 and I can confirm the exact same behaviour.
While I didn't try Ubuntu 20.04 where it supposedly doesn't happen, I
can add that it happens in Fedora 41 as well.
The "fix" is exactly as the author describes, disabling panel self
refresh in grub.
Though it's unclear how m
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
[i91
@Daniel van Vugt (vanvugt)
Thanks, I'll give that a try. Just to note though that I think the jerky
mouse is just a symptom of the low refresh rate of the screen, the
display is generally unresponsive and you get a lot of graphical
glitches and screen tearing etc. No issues at all when using an ex
OK, got it. The testing kernel is for fixing another psr related issue.
I thought this could fix your problem too, but looks like it couldn't
fix the issue on your side.
You could file a bug to Intel:
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/
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A jerky mouse pointer can also be a symptom of an optimization that went
into Mutter 45 and 46. It seems to hurt some machines but not others. To
avoid that you can edit /etc/environment and add:
MUTTER_DEBUG_FORCE_KMS_MODE=simple
then reboot.
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@Hui Wang
I followed your instructions, installed the test kernel and removed
i915.enable_psr=0 from grub.
The performance is slightly better than on default Ubuntu 24.04, but the
mouse pointer still jumps around and the in-built display is still
laggy/unresponsive. I would still say it is unusab
Download linux-image-unsigned-6.8.0-1001-oem_6.8.0-1001.1+psr2_amd64.deb
and linux-modules-6.8.0-1001-oem_6.8.0-1001.1+psr2_amd64.deb to a local
folder (like /tmp/test), then $cd /tmp/test; $sudo dpkg -i *.deb, reboot
the sytem, in the grub, select linux-6.8.0-1001 to boot up (don't forget
remove i
Hi @Hui Wang,
Happy to test, but can you point me towards a guide on how to install &
enable the Kernel you linked to?
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Title:
[i915] Display is
@Jonathon,
Could you help test this kernel?
https://people.canonical.com/~hwang4/psr2-oem68/
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Title:
[i915] Display is Laggy/Unresponsive when P
