Bug 324032

Summary: Hardware brightness change not detected
Product: [Frameworks and Libraries] solid Reporter: Kai Uwe Broulik <kde>
Component: powermanagement-daemonAssignee: Dario Freddi <drf>
Status: RESOLVED WORKSFORME    
Severity: normal CC: m2k.networx
Priority: NOR    
Version: 4.11.0   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed In:

Description Kai Uwe Broulik 2013-08-25 21:57:03 UTC
When changing the brightness using my Fn keys (which act weird, and seem to do some ACPI magic directly), PowerDevil doesn't pick up the brightness changes, so neither OSD shows up, nor battery monitor slider adjusts.

udevadm monitor shows the events:
KERNEL[3110.548241] change   /devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 (backlight)
UDEV  [3110.548567] change   /devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 (backlight)
KERNEL[3110.548931] change   /devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 (backlight)
UDEV  [3110.549284] change   /devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 (backlight)

xrandr knows the brightness too:
        BACKLIGHT: 1 (0x00000001)       range:  (0,10)
        Backlight: 1 (0x00000001)       range:  (0,10)


Reproducible: Always
Comment 1 Laurent 2014-01-26 16:28:08 UTC
Hi,

Fixed for me on Lenovo T440p.

See: https://bugs.kde.org/show_bug.cgi?id=323516 , comment 24