User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:25.0) Gecko/20100101
Firefox/25.0
Build Identifier: 

LCD brightness control keys doesn't work.
I've tried a lot of ACPI boot param -non helped.
It worked in 13.1 (just KDE OSD was not shown).

I'am able to change brightness via battery monitor widget but not via fn keys.

Reproducible: Always




tried
#######################

acpi_osi=""!Windows 2012""

acpi_os_name=Linux acpi_osi=

acpi_osi=Linux

"acpi_backlight=vendor" "acpi_osi=linux"

acpi_osi=\"!Windows 2012\"

"DISABLE AUTOLOGIN"

xev on 13.1 (not registred on 13.2)
#######################
KeyRelease event, serial 41, synthetic NO, window 0x3800001,
    root 0x7f, subw 0x0, time 603182, (-430,434), root:(153,457),
    state 0x0, keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown),
same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

FocusOut event, serial 41, synthetic NO, window 0x3800001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 41, synthetic NO, window 0x3800001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 41, synthetic NO, window 0x0,
    keys:  1   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   2   0   0   

KeyRelease event, serial 41, synthetic NO, window 0x3800001,
    root 0x7f, subw 0x0, time 603564, (-430,434), root:(153,457),
    state 0x0, keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp),
same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False