*** This bug is a duplicate of bug 1950060 ***
https://bugs.launchpad.net/bugs/1950060
** This bug has been marked a duplicate of bug 1950060
Unable to adjust screen backlight brightness on Google Pixelbook Eve
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https://bugs.launchpad.net/bugs/1951692
Title:
Backlight adjustment doesn't work on Lenovo Ideapad Duet 3i
Status in Linux:
Unknown
Status in linux package in Ubuntu:
New
Status in linux-hwe package in Ubuntu:
New
Status in linux-hwe-5.13 package in Ubuntu:
New
Bug description:
Duet 3i backlight doesn't work with kernel 5.13 on jammy alpha. But it
is currently the same kernel with witch impish runs.
I suspect it needs the parameter i915.enable_dpcd_backlight=1 to make it work.
However this function is broken since 5.12, please backport the following
upstream patches.
https://patchwork.freedesktop.org/series/95127/
Freedesktop bug report
https://gitlab.freedesktop.org/drm/intel/-/issues/3680
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