Public bug reported:
SRU justification:
[Impact]
Backlight can't be controlled on 5.11- version of kernel.
[Fix]
The panel needs DPCD to get control of backlight.
After 5.12 kernel introduced new Intel HDR backlight control, and it works well
on this panel.
Add quirk ID to enable DPCD on 5.11- kernel.
[Test]
Vendor Verified on hardware, with this quirk backlight can be changed on 5.10
and 5.11 kernel.
[Where problems could occur]
The panel backlight may not be changed.
** Affects: hwe-next
Importance: Undecided
Assignee: AaronMa (mapengyu)
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Focal)
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** No longer affects: linux-oem-5.10 (Ubuntu Hirsute)
** Also affects: hwe-next
Importance: Undecided
Status: New
** Changed in: hwe-next
Assignee: (unassigned) => AaronMa (mapengyu)
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https://bugs.launchpad.net/bugs/1930527
Title:
[SRU][OEM-5.10/H] Fix backlight control on Samsung 16727 panel
Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-oem-5.10 package in Ubuntu:
New
Status in linux-oem-5.10 source package in Focal:
New
Status in linux source package in Hirsute:
New
Bug description:
SRU justification:
[Impact]
Backlight can't be controlled on 5.11- version of kernel.
[Fix]
The panel needs DPCD to get control of backlight.
After 5.12 kernel introduced new Intel HDR backlight control, and it works
well
on this panel.
Add quirk ID to enable DPCD on 5.11- kernel.
[Test]
Vendor Verified on hardware, with this quirk backlight can be changed on 5.10
and 5.11 kernel.
[Where problems could occur]
The panel backlight may not be changed.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1930527/+subscriptions
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