@Po-Hsu, Please skip comment #7.
Since latest kernel fixes this issue, it should be win8 backlight issue. Backlight control is moved to gfx after win8. video.use_native_backlight=1 is set as default after 3.16-r2.
Utopic release should fix this issue.
@Po-Hsu,
Please skip comment #7.
Since latest kernel fixes this issue, it should be win8 backlight issue. native_ backlight= 1 is set as default after 3.16-r2.
Backlight control is moved to gfx after win8.
video.use_
Utopic release should fix this issue.