[arch-general] Persistent black screen of death issues with radeon graphics

[Martti Kühne]

I had a similar issue on my laptop on very rare occasions.
Make sure it's not just a setting of 0 on your
/sys/class/backlight/*/brightness... Otherwise you might have to set
it on the kernel command line or in /etc/modprobe.*.

Cheers!
mar77i