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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1856134
and then change the status of the bug to 'Confirmed'.
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to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Bionic)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1856134
Title:
Support DPCD aux brightness control
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux source package in Bionic:
Incomplete
Status in linux-oem-osp1 source package in Bionic:
In Progress
Bug description:
[Impact]
A new Dell platform using DPCD aux to adjust the brightness, we need to
backport some patches which are still under discussing.
[Fix]
Here is the patchset we need.
https://patchwork.freedesktop.org/series/69914/
[Test]
Verified on new Dell platform which use DPCD aux to adjust brightness and
also others which using pwm to adjust brightness, no regression found.
[Regression Potential]
Low, the new DPCD method only taken effect on the platforms which are listed
in the quirk.
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