** Changed in: linux (Ubuntu Eoan)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Disco)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1813877
Title:
Can't adjust brightness on DELL UHD dGPU AIO
Status in HWE Next:
New
Status in OEM Priority Project:
New
Status in linux package in Ubuntu:
Invalid
Status in linux-oem package in Ubuntu:
New
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux source package in Bionic:
Fix Committed
Status in linux-oem source package in Bionic:
Fix Released
Status in linux-oem-osp1 source package in Bionic:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Status in linux source package in Eoan:
Fix Committed
Bug description:
[Impact]
The dell-uart-backlight driver has been loaded, but the backlight is
controller by graphics driver instead of scalar IC. The old way to determinate
weather the driver should be loaded is not working anymore, since the behavior
of scalar command, show firmware version, is not the same as old platforms.
[Fix]
Using more a reliable command, get_scalar_status, to check if scalar is in
charge of the AIO backlight.
For the old platforms which don't have the new command, I add a list to list
them all and use the old way to determinate the scalar IC.
[Test]
Verified on old and new Dell AIO platforms.
[Regression Potential]
Low. The quirk lists all old platforms which use the old way to check if
scalar IC is in use. So, it won't change the behavior on old platforms, and
apply the new method on new platforms.
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