Comment # 1
on bug 108668
from Samantha McVey
In addition, even though there is a write error, when you read back the brightness value, it shows that the backlight is at level 0, while its brightness has actually been unchanged from before: echo 0 > /sys/devices/pci0000:00/0000:00:08.1/0000:05:00.0/backlight/amdgpu_bl0/brightness bash: echo: write error: Invalid argument cat /sys/devices/pci0000:00/0000:00:08.1/0000:05:00.0/backlight/amdgpu_bl0/brightness 0
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