--- Comment #4 from Hans de Jong <pipo2004(a)gmail.com> ---
I added the dmesg outputs for kernel 4.10.13-1-default and 4.11.4-1-default.
With the 4.10 kernel everything works fine. With the 4.11.4-1-default kernel,
/sys/class/backlight/acpi_video0 shows up instead of
/sys/class/backlight/intel_backlight and brightness cannot be changed even when
changing the value of brightness in that directory.
I also installed kernel 4.12 from OBS, but that one boots into a black screen
with no messages.
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