Comment # 2
on bug 110407
from Kai-Heng Feng
(In reply to Ilia Mirkin from comment #1) > When in non-switchable mode, are there other things in /sys/class/backlight? > e.g. acpi_video0? No, nv_backlight (or nvidia_0) is the only interface. I also tried to call _BCM directly via acpidbg, but both Intel's and Nvidia's _BCM method changes nothing. Please refer to the original bug report [1]. > > Also, presumably this is on v5.0 or later? Prior to that, there was no > backlight support for Pascal. Yes, on both v5.0 and linux-next. [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821882
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