[Bug 775624] Re: Screen brightness slider has no effect

[piccobello]

I have the same problem since natty upgrade, on a Panasonic Toughbook CF-T5
Also Fn keys for screen brightness stopped working, they used to work out of the box in Lucid.
 Volume up/down/mute Fn keys work as usual.
I do have a /sys/class/backlight/panasonic/brightness that can be manually changed,
and that works.

I did look into ACPI events a long time ago, but I have a feeling a lot changed since then,
so any hint about where to look first would be appreciated. Actually I did not even get 
how to run acpid with -d option with the new "upstart" system.

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https://bugs.launchpad.net/bugs/775624

Title:
  Screen brightness slider has no effect