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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'.
If, due to the nature of the issue you have encountered, you are unable
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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