[Bug 82833] backlight-helper gets upset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82833

--- Comment #22 from Chris Wilson <chris at chris-wilson.co.uk> ---
Maybe try acpi_backlight=vendor on the kernel commandline. (I am never certain
which option is the right one).

Alternatively, you can try

echo blacklist dell-laptop >> /etc/modprobe.d/backlight.conf

and rebuild your initramfs just in case.

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