[arch-general] sleep + lid events + kde => new problem

Martín Cigorraga msx at archlinux.us
Tue Sep 18 20:26:40 EDT 2012

On Mon, Sep 17, 2012 at 10:21 PM, Genes MailLists <lists at sapience.com>

> unplugging a/c and going to battery - laptop beeps - but screen no
> longer dims -
> Again - I can dim screen by hand by doing something like this:
>   echo '11' > /sys/class/backlight/acpi_video0/brightness
> This has been flaky a while but usually worked at least some of the time
> - now its just not working period.

Good tip, didn't knew about it.
In my particular case I need to add acpi_backlight=vendor to the kernel
line in order to be able to control screen bright with the fn+function keys
combination (only in KDE SC, this don't work in dwm or Awesome), may be you
can try this to solve your problem.

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