[Bug 62281] intel_backlight not working

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=62281

--- Comment #2 from Jani Nikula <jani.nikula at intel.com> ---
We should debug this with upstream vanilla kernel, without the patches. Please
use acpi_backlight=vendor kernel parameter and drm.debug=0xe module parameter.
The hotkeys won't work with this, but try changing backlight through the gui
and the sysfs file. Please attach dmesg all the way from boot to where you try
to change backlight. Thanks.

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