Comment 20 for bug 993187

It looks like we may have two separate bugs. People who have their xsession mostly freeze but can still access the console and move the mouse, and those whose systems completely lock up. I'm getting the 'completely locked up' problem.

I started with the default nvidia drivers. I would get almost daily system freezes so I upgraded to the latest ones available from the 'Additional Drivers' menu. I still had daily system freezes, so I disabled the nvidia drivers from the 'Additional Drivers' menu and started using the nouveau drivers. This still locks up daily. It doesn't matter if I'm using the system or not, sometimes I'll find it frozen when I get up in the morning.

I'm using 12.04 64 bit with kernel 3.2.0-24-generic #37-Ubuntu SMP. This computer was rock solid before my upgrade to 12.04. I can see errors in the /var/log/syslog file at the time of the system freeze. I get messages like the one below. Sometimes I'll get many register dumps, one for each CPU in my 8 core system. The process name is always different as well, but it's always a BUG: soft lockup error. For those experiencing just the X freezes, but can still log in remotely or on the console, it would be good to know if you see something similar. It might help determine whether these are two separate bugs or the same bug that affects people differently.

May 10 12:41:54 bread kernel: [58856.680822] BUG: soft lockup - CPU#1 stuck for 22s! [gvfs-gdu-volume:3807]
May 10 12:41:54 bread kernel: [58856.680826] Modules linked in: autofs4 bnep ppdev rfcomm bluetooth nfsd binfmt_misc nfs lockd fscache auth_rpcgss nfs_acl sunrpc dm_crypt snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device psmouse snd serio_raw pl2303 usbserial soundcore snd_page_alloc i7core_edac edac_core ioatdma dca mac_hid shpchp lp parport nouveau firewire_ohci firewire_core crc_itu_t usbhid hid e1000e ttm mptsas drm_kms_helper mptscsih mptbase drm scsi_transport_sas i2c_algo_bit mxm_wmi wmi video floppy [last unloaded: parport_pc]
May 10 12:41:54 bread kernel: [58856.680882] CPU 1
May 10 12:41:54 bread kernel: [58856.680884] Modules linked in: autofs4 bnep ppdev rfcomm bluetooth nfsd binfmt_misc nfs lockd fscache auth_rpcgss nfs_acl sunrpc dm_crypt snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device psmouse snd serio_raw pl2303 usbserial soundcore snd_page_alloc i7core_edac edac_core ioatdma dca mac_hid shpchp lp parport nouveau firewire_ohci firewire_core crc_itu_t usbhid hid e1000e ttm mptsas drm_kms_helper mptscsih mptbase drm scsi_transport_sas i2c_algo_bit mxm_wmi wmi video floppy [last unloaded: parport_pc]
May 10 12:41:54 bread kernel: [58856.680926]
May 10 12:41:54 bread kernel: [58856.680930] Pid: 3807, comm: gvfs-gdu-volume Not tainted 3.2.0-24-generic #37-Ubuntu Supermicro X8DA6/X8DA6
May 10 12:41:54 bread kernel: [58856.680935] RIP: 0010:[<ffffffff8103db25>] [<ffffffff8103db25>] __ticket_spin_lock+0x25/0x30
May 10 12:41:54 bread kernel: [58856.680944] RSP: 0018:ffff880622ef9b48 EFLAGS: 00000297
May 10 12:41:54 bread kernel: [58856.680946] RAX: 00000000000053e5 RBX: ffff880622ef9e3c RCX: 0000000001c10ac2
May 10 12:41:54 bread kernel: [58856.680949] RDX: 00000000000053e6 RSI: ffffc9000291bf10 RDI: ffffffff81c04440
May 10 12:41:54 bread kernel: [58856.680952] RBP: ffff880622ef9b48 R08: ffff880333c36fe0 R09: 0000000000000000
May 10 12:41:54 bread kernel: [58856.680955] R10: 0000000000000000 R11: 0000000000000006 R12: 00000000f76f2000
May 10 12:41:54 bread kernel: [58856.680958] R13: 0000000000000002 R14: ffff880628192de0 R15: ffff880301813900
May 10 12:41:54 bread kernel: [58856.680961] FS: 0000000000000000(0000) GS:ffff880333c20000(0063) knlGS:00000000f7057740
May 10 12:41:54 bread kernel: [58856.680964] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
May 10 12:41:54 bread kernel: [58856.680967] CR2: 00000000f76f2000 CR3: 0000May 10 12:46:20 bread kernel: imklog 5.8.6, log source = /proc/kmsg started.