I have similar problems but I don't see any "Xid" errors. This caused my system to lock up and then reboot itself:
Jan 3 17:34:37 localhost kernel: [97047.912612] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912622] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912629] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912633] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912637] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912641] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912645] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912650] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912656] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912662] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912669] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912675] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:34:37 localhost kernel: [97047.912681] NVRM: os_map_kernel_space: can't map 0xe0008000, invalid context! Jan 3 17:35:33 localhost syslogd 1.4.1#21ubuntu3: restart.
I have similar problems but I don't see any "Xid" errors. This caused my system to lock up and then reboot itself:
Jan 3 17:34:37 localhost kernel: [97047.912612] NVRM: os_map_ kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context! kernel_ space: can't map 0xe0008000, invalid context!
Jan 3 17:34:37 localhost kernel: [97047.912622] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912629] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912633] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912637] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912641] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912645] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912650] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912656] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912662] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912669] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912675] NVRM: os_map_
Jan 3 17:34:37 localhost kernel: [97047.912681] NVRM: os_map_
Jan 3 17:35:33 localhost syslogd 1.4.1#21ubuntu3: restart.