[Nouveau] [Bug 110407] /sys/class/backlight/nv_backlight doesn't work on Dell Precision 7530 GP107GLM [Quadro P1000 Mobile]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110407

--- Comment #2 from Kai-Heng Feng <kai.heng.feng at canonical.com> ---
(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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