Comment # 21
on bug 107045
from Andrey Grodzovsky
(In reply to taijian from comment #20) > OK, here is a new twist: upon further investigating this, I came across some > weird backlight behaviour that I originally reported here: > https://gitlab.gnome.org/GNOME/gnome-settings-daemon/issues/53. However, as > it turns out, this is not a gnome issue but a kernel one. > > Namely, doing > > echo X > /sys/class/backlight/intel_backlight/brightness > > will wake my dGPU, even though it really shouldn't be involved at all (and > does not have a /sys/class/backlight device registered). Furthermore, > repeatedly invoking this command before the dGPU has had the chance to go > back to sleep will not do anything. Thirdly, this seems to be a very good > way to get the system to hard lock up. > > So, is this an amdgpu issue? A i915 issue? ACPI? where should I take this > bug report? What do you mean by 'wake' the dGPU? This should be a separate ticket which you can submit here + attach dmesg after this 'wake'.
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