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[Bug 1040857] Screen brightness on skylake + optimus laptop with kernel 4.11
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Wed, 14 Jun 2017 14:02:44 +0000
  • Message-id: <>

--- Comment #4 from Hans de Jong <pipo2004@xxxxxxxxx> ---
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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