kwin crash

gistfile1.txt

[  1258.635] (WW) NVIDIA(GPU-0):     for mode "720x576".
[  1421.672] (EE) 
[  1421.672] (EE) Backtrace:
[  1421.672] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7f9972239e96]
[  1421.672] (EE) 1: /usr/bin/X (0x7f9972083000+0x1bb099) [0x7f997223e099]
[  1421.672] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f996fdb7000+0x36eb0) [0x7f996fdedeb0]
[  1421.672] (EE) 3: /usr/bin/X (0x7f9972083000+0x53d7f) [0x7f99720d6d7f]
[  1421.672] (EE) 4: /usr/bin/X (0x7f9972083000+0x571c7) [0x7f99720da1c7]
[  1421.672] (EE) 5: /usr/bin/X (0x7f9972083000+0x5b3d6) [0x7f99720de3d6]
[  1421.672] (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f996fdd8ec5]
[  1421.672] (EE) 7: /usr/bin/X (0x7f9972083000+0x4576e) [0x7f99720c876e]
[  1421.672] (EE) 
[  1421.672] (EE) Floating point exception at address 0x7f99720d6d7f
[  1421.672] (EE) 
Fatal server error:
[  1421.672] (EE) Caught signal 8 (Floating point exception). Server aborting
[  1421.672] (EE) 
[  1421.672] (EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[  1421.672] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[  1421.673] (EE) 
[  1422.192] (EE) Server terminated with error (1). Closing log file.