I've Archlinux installed on my laptop Fujitsu Amilo Pi 2*** and I cannot find any log at /var/log that has the StackTrace.

The Kernel panics ALWAYS when I try to modify screen brightness.

Where are those Logs or StackTraces?

Do I have to install any package to catch that StackTrace?

Where should I send that Log/StackTrace?

Thanks for reading.

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UPDATE 1 I cannot change brightness trough console: xbacklight -get and any other parameter as -dec or -inc always returns:

[kangcoding@Pi2530Arch ~]$ xbacklight -set 100
No outputs have backlight property

I still cannot find log files or stacktraces of this Kernel Panic. Here is a Photo: