https://bugzilla.kernel.org/show_bug.cgi?id=43148
Summary: Backlight control doesn't work with Acer Aspire 5745DG
Product: ACPI
Version: 2.5
Kernel Version: 3.3.2
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: acpi_power-vi...@kernel-bugs.osdl.org
ReportedBy: sma....@gmx.de
Regression: No
Controlling the backlight doesn't work.
I've tried:
Normal boot (no Grub options)
=============================
--> control via echo 3 > /sys/class/backlight/acpi_video0/brightness --> no
action happens (a cat shows the new value 3 (old value 9)
--> Via FN+Cursor Up / Down --> no action happens
ACPI Vendor boot (acpi_backlight=vendor)
=============================
--> control via echo 3 > /sys/class/backlight/acpi_video0/brightness --> no
action happens (a cat shows the new value 3 (old value 9)
--> Via FN+Cursor Up / Down --> no action happens
NOACPI boot (acpi=off)
=============================
--> control via echo 3 > /sys/class/backlight/acpi_video0/brightness --> no
action happens (a cat shows the new value 3 (old value 9)
--> Via FN+Cursor Up / Down --> no action happens
Win7 Boot
=============================
--> Via FN+Cursor Up / Down --> Brightness control works ;-(
Created Files:
==============
Files where created in normal boot mode. (Without parameters)
Files where created created after pressing FN+Cursor Up / Down and after
control via sys/class/...
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