backlight problems on intel and new stuff

[Lyman]

Sergio Monteiro Basto 写道:
> Hi, for the records ,
> 
> backlight has gone mad after upgrade to fedora 10 and I can't work,
> backlight flicks and flicks , especially after press lid button or
> hibernate.
> I don't found what component have the bug. 
> My laptop Compaq nx6110 is an old laptop with almost 3 years of life
> time, which have an empty /sys/class/backlight/, to me seems to be the
> problem try control backlight when doesn't have ACPI registers and have
> one i915GM .
> 
> I downgrade kernel to 2.6.26 , xorg server to 1.4.2 , Mesa to 7.0.4,
> libdrm to 2.3.0 , and xorg-x11-drv-intel to 2.2.1 , and backlight have
> cool down, after a while  .
> 
> Any suggestion ? 
You might need xrandr to control backlight.

1, select a working backlight control mode
   eg. xrandr --output LVDS --set BACKLIGHT_CONTROL legacy
2, set backlight level
   eg. xrandr --output LVDS --set BACKLIGHT ${VALUE}

"man intel" will give you more information about BACKLIGHT &&
BACKLIGHT_CONTROL.

> 
> I try understand if the problem is in kernel or in mesa or in Intel
> drive but can't figure out where is the problem.
> 
> Thanks,
> 
> 
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