For sure this isn't a BIOS issue
UX31A.218
01/31/2013
The Fn+f5 and Fn+f6 for decrease and increase brightness work but only
from 10 to 9 decreasing and get stuck at 9. Then increasing works from 9
to 10 and gets stuck at 10. Also Fn+f7 works to toggle the backlight on
and off.
With xev I get for brightness increase and decrease
FocusOut event, serial 555, synthetic NO, window 0x3e00001,
mode NotifyGrab, detail NotifyAncestor
FocusOut event, serial 555, synthetic NO, window 0x3e00001,
mode NotifyUngrab, detail NotifyPointer
FocusIn event, serial 555, synthetic NO, window 0x3e00001,
mode NotifyUngrab, detail NotifyAncestor
KeymapNotify event, serial 555, synthetic NO, window 0x0,
keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RRNotify event, serial 555, synthetic NO, window 0x3e00001,
subtype XRROutputPropertyChangeNotifyEvent
output eDP1, property Backlight, timestamp 30495514, state NewValue
Previous serial was 553 and next is 557
Is that giving some information where to search for thsi bug? With
previous GNOME Shell(same BIOS) this was working fine but keyboard
illuminations was buggy, but that is now OK.
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https://bugs.launchpad.net/bugs/1400050
Title:
Brightness doesn't change anymore in X.Org / GNOME Shell in 14.10
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