Bug 324032 - Hardware brightness change not detected
Summary: Hardware brightness change not detected
Status: RESOLVED WORKSFORME
Alias: None
Product: solid
Classification: Frameworks and Libraries
Component: powermanagement-daemon (show other bugs)
Version: 4.11.0
Platform: unspecified Linux
: NOR normal
Target Milestone: ---
Assignee: Dario Freddi
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-08-25 21:57 UTC by Kai Uwe Broulik
Modified: 2015-01-26 21:05 UTC (History)
1 user (show)

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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