I compiled 3.17rc7 with the packet0 patch. You can find a dmesg log just above this message. Running firefox with RADEON_DUMP_CS=1 didn't produce any dump. Is it because I need the mesa dbg packages (not currently installed)? I guess it should appear on the console output, right? Or is it writen to a file? (Sorry about those noob questions. First time debugging this kind of problem...)