Re: [Intel-gfx] i915 black screen introduced by ACPI changes
From: Chris Li
Date: Fri Mar 15 2013 - 05:33:16 EST
On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula
<jani.nikula@xxxxxxxxxxxxxxx> wrote:
> Fun. The BIOS seems to ask for zero backlight. Maybe it means something
> else for Windows 8. White is the new black or something.
I did some experiment, I go to intel_backlight directory.
It show brightness is 4648, but actual_brightness is 0.
Then I do "echo 4648 > brightness", the screen actually
come back to light. X window function properly.
However, if I go to suspend and resume. It is black screen
again.
If I use the Fn+Brightness to adjust the brightness. It seems
the ACPI brightness is set to lowest. One press of "Fn+Brightness up"
will give me about 10% of the brightness. It does not feel like
white is the new black.
Chris
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