Created attachment 115519 [details] Xorg.0.log of the crashed session I experienced a lockup/freeze without any specific reason. Operating system: Kubuntu 14.10 Linux Kernel: 3.19.0 libglamor version: 0.6.0+git20140801.347ef4f0-0ubuntu0sarvatt libdrm-radeon version: 2.4.60+git20150416.0d78b37b-0ubuntu0ricotz2~utopic xserver/radeon version: 7.4.99+git20140806.fbf575cb-0ubuntu0sarvatt3 MESA version: 10.6.0~git20150423.1 At the time of the hang I had started some rsync copying quite some data between two remote NFS mounts on different servers. When X freeze'd, the display went black and monitors turned into standby. Changing to another terminal was not possible, although keys like NumLock still reacted. In addition, all other processes - even foreground processes inside the X sessions' terminal windows - continued to run (like the rsync). The actual backtrace of the X freeze (debugging symbols where not installed up to now, sorry): (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7ff7b4c1c986] (EE) 1: /usr/bin/X (0x7ff7b4a66000+0x1bab69) [0x7ff7b4c20b69] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7ff7b2798000+0x36eb0) [0x7ff7b27ceeb0] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7ff7b2798000+0x98168) [0x7ff7b2830168] (EE) 4: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x16e7ce) [0x7ff7ac8b07ce] (EE) 5: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x16ebd2) [0x7ff7ac8b0bd2] (EE) 6: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x16f51a) [0x7ff7ac8b151a] (EE) 7: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x1c604f) [0x7ff7ac90804f] (EE) 8: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x1604fa) [0x7ff7ac8a24fa] (EE) 9: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x16076a) [0x7ff7ac8a276a] (EE) 10: /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so (0x7ff7ac742000+0x160a78) [0x7ff7ac8a2a78] (EE) 11: /usr/lib/xorg/modules/libglamoregl.so (0x7ff7ade2a000+0x223e4) [0x7ff7ade4c3e4] (EE) 12: /usr/lib/xorg/modules/libglamoregl.so (0x7ff7ade2a000+0x225d2) [0x7ff7ade4c5d2] (EE) 13: /usr/lib/xorg/modules/libglamoregl.so (0x7ff7ade2a000+0x13b31) [0x7ff7ade3db31] (EE) 14: /usr/lib/xorg/modules/libglamoregl.so (0x7ff7ade2a000+0x13f0a) [0x7ff7ade3df0a] (EE) 15: /usr/bin/X (0x7ff7b4a66000+0x140103) [0x7ff7b4ba6103] (EE) 16: /usr/bin/X (0x7ff7b4a66000+0x53cd0) [0x7ff7b4ab9cd0] (EE) 17: /usr/bin/X (0x7ff7b4a66000+0x57077) [0x7ff7b4abd077] (EE) 18: /usr/bin/X (0x7ff7b4a66000+0x5b286) [0x7ff7b4ac1286] (EE) 19: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7ff7b27b9ec5] (EE) 20: /usr/bin/X (0x7ff7b4a66000+0x456ae) [0x7ff7b4aab6ae] (EE) (EE) Bus error at address 0x7ff7b4914000 (EE) Fatal server error: (EE) Caught signal 7 (Bus error). Server aborting
Created attachment 115520 [details] Excerpt from syslog from the time of the freeze
Created attachment 115521 [details] lspci -vnvn -s 01:00
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