[Bug 428910] Re: Acer Aspire 5520 has backlight broken in Karmic Koala

[Abraham Smith]

I know this is marked as fixed, but I am having what appears to be the
same problem on an Acer aspire timelineX 1830T in karmic kubuntu, fully
updated.  I wondering if it is a regression or if this model needs
another patch.

With either xbacklight or the hotkeys, no change is made.

After applying  acpi_backlight=vendor to the grub config and rebooting, a backlight directory appears as: /sys/devices/platform/acer-wmi/backlight/acer-wmi/
actual_brightness
bl_power
brightness
device 
max_brightness 
power
subsystem
uevent

max_brightness is 9.
I can echo into brightness, and that number changes, but no effect in the display.
actual_brightness is always stuck at 0.

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Acer Aspire 5520 has backlight broken in Karmic Koala
https://bugs.launchpad.net/bugs/428910
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