Please test latest drm-tip kernel without the PSR parameter:
https://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/
If it doesn't solve the issue, please file an upstream bug at
https://bugs.freedesktop.org/
Product: DRI
Component: DRM/i915
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** Summary changed:
- [Star LabTop (Mk III)] Screen backlight pulses rapidly when cursor is still.
+ [Star LabTop (Mk III)] Screen backlight pulses rapidly when cursor is still,
but i915.enable_psr=0 fixes it
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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You received
After adding the kernel parameter specified, the problem has been
resolved. Thank you so much for the help!
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https://bugs.launchpad.net/bugs/1850066
Title:
[Star LabTop (Mk III)]
** No longer affects: mutter (Ubuntu)
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https://bugs.launchpad.net/bugs/1850066
Title:
[Star LabTop (Mk III)] Screen backlight pulses rapidly when cursor is
still.
To manage
I wonder if the problem is related to panel self refresh, since it is
affected by hardware cursor movement.
Please try adding kernel parameter:
i915.enable_psr=0
to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and then run:
sudo update-grub
and reboot.
If that's the problem then it
The brightness number does not seem to fluctuate, so it might be a
different issue than the backlight that creates the pulsing effect.
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Title:
Does '/sys/class/backlight/intel_backlight/brightness' rapidly change
when this issue happens?
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https://bugs.launchpad.net/bugs/1850066
Title:
[Star LabTop (Mk III)] Screen backlight
apport information
** Tags added: apport-collected
** Description changed:
The backlight for my display appears to brighten and dim rapidly
whenever the mouse cursor is still, but stops when the cursor is being
moved. The pulsing backlight is distracting and causes eye strain. Same
** Package changed: gnome-shell (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Changed in: mutter (Ubuntu)
Status: Incomplete => New
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There is not an automatic brightness setting on my laptop.
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https://bugs.launchpad.net/bugs/1850066
Title:
[Star LabTop (Mk III)] Screen backlight pulses rapidly when cursor is
Please check to see if your laptop has this option, and if so then turn
it off:
Settings > Power > Automatic Brightness
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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** Summary changed:
- Screen backlight pulses rapidly when cursor is still.
+ [Star LabTop (Mk III)] Screen backlight pulses rapidly when cursor is still.
** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu)
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
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