It just froze again after user switch. I could connect from another computer via ssh. What happens is that the X server is taking 100% of CPU while doing nothing. Here is the result of top: top - 10:24:48 up 2:23, 5 users, load average: 0.96, 0.63, 0.44 Tasks: 296 total, 2 running, 294 sleeping, 0 stopped, 0 zombie Cpu(s): 12.6%us, 0.0%sy, 0.0%ni, 87.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 16412940k total, 4394816k used, 12018124k free, 353460k buffers Swap: 20971516k total, 0k used, 20971516k free, 1703748k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2509 root 20 0 197m 81m 20m R 100.1 0.5 3:39.16 X Here is the end of dmesg (full log attached): [ 9.767452] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 11.095246] NVRM: Your system is not currently configured to drive a VGA console [ 11.095249] NVRM: on the primary VGA device. The NVIDIA Linux graphics driver [ 11.095250] NVRM: requires the use of a text-mode VGA console. Use of other console [ 11.095251] NVRM: drivers including, but not limited to, vesafb, may result in [ 11.095252] NVRM: corruption and stability problems, and is not supported. [ 11.272563] jme 0000:03:00.0: p1p1: Link is up at ANed: 100 Mbps, Full-Duplex, MDI-X [ 12.163589] IPv6: ADDRCONF(NETDEV_CHANGE): p1p1: link becomes ready [ 18.928156] fuse init (API version 7.20) [ 18.937985] SELinux: initialized (dev fuse, type fuse), uses genfs_contexts [ 18.958490] SELinux: initialized (dev fusectl, type fusectl), uses genfs_contexts [ 397.734049] TCP: lp registered [ 807.384111] SELinux: initialized (dev fuse, type fuse), uses genfs_contexts [ 900.445624] usb 2-1.2: usbfs: interface 1 claimed by usblp while 'xsane' sets config #1 [ 911.880596] usb 2-1.2: usbfs: interface 1 claimed by usblp while 'xsane' sets config #1 [ 1514.963116] SELinux: initialized (dev fuse, type fuse), uses genfs_contexts [ 5379.310344] nepomukservices[4370]: segfault at 0 ip (null) sp 00007fff23a794e8 error 14 in nepomukservicestub[400000+7000] [ 8423.252973] usb 2-1.2: usbfs: interface 0 claimed by usbfs while 'xsane' sets config #1 [ 8428.030674] usb 2-1.2: usbfs: interface 0 claimed by usbfs while 'xsane' sets config #1 [ 8481.203974] NVRM: GPU at 0000:01:00: GPU-a26ca184-dbb8-cb76-a255-3c1db789ce86 [ 8481.203978] NVRM: Xid (0000:01:00): 38, 0002 0000902d 00000000 00000000 00000100 00000000 [ 8483.259787] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context [ 8485.256822] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context [ 8486.657367] NVRM: Xid (0000:01:00): 38, 0002 00000000 00000000 00000000 00000000 00000000 [ 8488.098020] NVRM: Xid (0000:01:00): 38, 0000 00000000 00000000 00000000 00000000 00000000 Does this help? Frédéric
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