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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1831587
Title:
brightness control not work with OLED panel
Status in OEM Priority Project:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
image: disco 19.04
kernel: 5.0.0-15-generic
also verified failed on linux-image-unsigned-5.2.0-050200rc2-generic
also refer to :
-
https://askubuntu.com/questions/824949/lenovo-thinkpad-x1-yoga-oled-brightness
- https://bugs.freedesktop.org/show_bug.cgi?id=97883
Linux can not control the brightness on the OLED panel in the traditional way
[1].
Although there's a workaround from the community [2] that to execute script
while brightness hotkey event is triggered. But if we want to upstream it, it's
still a problem to recognize the OLED panel so that the system knows when to go
workaround.
- EDID of my laptop which has OLED: https://paste.ubuntu.com/p/w7rVqJTYDy/
- EDID of the same model without OLED: https://paste.ubuntu.com/p/P3ChhX9yBJ/
there's a kernel patch related OLED for reference:
- https://patchwork.kernel.org/patch/6133471/
[1] https://wiki.ubuntu.com/Kernel/Debugging/Backlight
[2]
https://askubuntu.com/questions/824949/lenovo-thinkpad-x1-yoga-oled-brightness
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