Comment 17 for bug 994203

Oh no, it still exists for GeForce 210 but it is just more seldom...
Now I got the following in my Xorg.log:

[ 829.352] (EE) Backtrace:
[ 829.353] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f3d522b0b76]
[ 829.353] (EE) 1: /usr/bin/X (0x7f3d52108000+0x1ac9a9) [0x7f3d522b49a9]
[ 829.353] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f3d51418000+0xfcb0) [0x7f3d51427cb0]
[ 829.353] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7f3d50068000+0x802ef) [0x7f3d500e82ef]
[ 829.353] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (__libc_malloc+0x75) [0x7f3d500eafb5]
[ 829.353] (EE) 5: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (0x7f3d50f80000+0x45e3b) [0x7f3d50fc5e3b]
[ 829.353] (EE) 6: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (0x7f3d50f80000+0x46e54) [0x7f3d50fc6e54]
[ 829.353] (EE) 7: /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 (pixman_region_subtract+0x9c) [0x7f3d50fc85dc]
[ 829.353] (EE) 8: /usr/lib/xorg/modules/libexa.so (0x7f3d4e068000+0x5af6) [0x7f3d4e06daf6]
[ 829.353] (EE) 9: /usr/lib/xorg/modules/libexa.so (0x7f3d4e068000+0x83e0) [0x7f3d4e0703e0]
[ 829.353] (EE) 10: /usr/lib/xorg/modules/libexa.so (0x7f3d4e068000+0x4d3f) [0x7f3d4e06cd3f]
[ 829.353] (EE) 11: /usr/bin/X (0x7f3d52108000+0x130550) [0x7f3d52238550]
[ 829.353] (EE) 12: /usr/bin/X (ValidateGC+0x24) [0x7f3d52170324]
[ 829.353] (EE) 13: /usr/bin/X (0x7f3d52108000+0x12371c) [0x7f3d5222b71c]
[ 829.353] (EE) 14: /usr/bin/X (miCompositeRects+0x8a) [0x7f3d5222b8ca]
[ 829.353] (EE) 15: /usr/bin/X (0x7f3d52108000+0x12b615) [0x7f3d52233615]
[ 829.353] (EE) 16: /usr/bin/X (0x7f3d52108000+0x55a91) [0x7f3d5215da91]
[ 829.353] (EE) 17: /usr/bin/X (0x7f3d52108000+0x4456a) [0x7f3d5214c56a]
[ 829.353] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f3d5008976d]
[ 829.353] (EE) 19: /usr/bin/X (0x7f3d52108000+0x448ad) [0x7f3d5214c8ad]
[ 829.353] (EE)
[ 829.353] (EE) Segmentation fault at address 0x254024e90

Unfortunately it seems that nouveau is not stable enough yet in Ubuntu...