Created attachment 112734 [details]
LIBGL_DEBUG=verbose steam

It's more then a week that I've faced a new issue with steam. 
I haven't played since November so I don't know if it's a known bug or a dumb
configuration.

In Dota2 settings I get only 10 (or less) FPS but as soon as I start a game I
have almost 30 FPS. The GPU is an R7-265 with an FX-8320@4.4GHz.
I'm sure that back in November I can run Dota settings at about 50+ FPS. What's
going on? I can't see any warning in dmesg.

Is this a common behaviour or it's a configuration problem?
I'm running kernel from agd5f git repo, drm-fixes-3.19 branch.
I've tried also with mesa in Debian Sid branch or with llvm3.6. No changes at
all.

I've run:
$ LIBGL_DEBUG=verbose steam > dota2.txt

I hope this can help.

PS: I build mesa on a separate 32bit chroot.