Comment 49 for bug 311716

after the latest update (a day or two ago) i've experience two problems (one mentioned already)

1) my fn up+down don't change brightness
2) when gnome-power-manager dims the backlight, it dims slowly and clunkily and spikes my CPU usage to 100% and makes any playing audio skip

however adding acpi_backlight=video fixes this

but this is a major regression for me

i'm running 8.10 x64 on a dell xps m1530