Public bug reported:
[Impact]
Cannot change brightness on HP ZBook Fury with certain panel.
[Fix]
Add the panel to DPCD quirk table to use DPCD to control the panel
backlight.
[Test]
Changing backlight sysfs doesn't change the display brightness.
With the patch applied, changing sysfs backlight can really change the
display brightness.
[Where problems could occur]
This fix is specific to a single panel, so it's not likely to cause any
regression to other devices.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Medium
Status: Confirmed
** Affects: linux (Ubuntu Groovy)
Importance: Medium
Status: Confirmed
** Affects: linux-oem-5.10 (Ubuntu Groovy)
Importance: Undecided
Status: Won't Fix
** Tags: oem-priority originate-from-1909961 stella
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Groovy)
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
** Changed in: linux (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Groovy)
Status: New => Won't Fix
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Groovy)
Importance: Undecided => Medium
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => Medium
** Tags added: oem-priority originate-from-1909961 stella
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https://bugs.launchpad.net/bugs/1911001
Title:
Use DCPD to control HP DreamColor panel
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Confirmed
Status in linux-oem-5.10 source package in Focal:
Confirmed
Status in linux source package in Groovy:
Confirmed
Status in linux-oem-5.10 source package in Groovy:
Won't Fix
Bug description:
[Impact]
Cannot change brightness on HP ZBook Fury with certain panel.
[Fix]
Add the panel to DPCD quirk table to use DPCD to control the panel
backlight.
[Test]
Changing backlight sysfs doesn't change the display brightness.
With the patch applied, changing sysfs backlight can really change the
display brightness.
[Where problems could occur]
This fix is specific to a single panel, so it's not likely to cause any
regression to other devices.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1911001/+subscriptions
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