(In reply to comment #0)
> Created attachment 69420 [details]
> seat 0 config
> 
> I'm running a multiseat setup with 2 radeon (ATI3650HD and ATI5450HD) and 1
> intel cpus, I'm using libdrm, mesa and xf86-video-ati from git on gentoo.
> 
> I'm syncing with the repos every thursday, yesterday I've syned with the
> repos and after boot today, all the screens connected to radeon are black.
> 
> in the sync last thursday everything worked ok, also when downgrading to
> xf86-video-ati-6.14.6, the system works.
> 
> when observing the commit logs on xf86-video-ati of this timeframe, the only
> commit is enabling 2D tiling.

thats gpus instead of cpus, my bad