Created attachment 121557 [details]
backtrace

Since yesterday night, I've been unable to get a window manage running (see
attached backtrace). After bisecting Mesa (was the only thing recompiled), I
found out that the following commit was the culprit. Any application being
launched while bisecting from and after that commit ends up with a
"r600_texture.c:562: r600_texture_get_htile_size: Assertion `0' failed" error.

294ec530c9829aead97487b1feb06361ef97cc2d is the first bad commit
commit 294ec530c9829aead97487b1feb06361ef97cc2d
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Sat Jan 30 01:52:58 2016 +0100

    gallium/radeon: just get num_tile_pipes from the winsys

    Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

:040000 040000 71cb2da01a5912443f2ca74f97e46533f50f50d8
964978b8372e95f18eb09db4158b032bf25611fb M    src