Triggered a reboot: Nov 22 11:34:38 Philinux kernel: [ 106.085237] __ratelimit: 3 callbacks suppressed Nov 22 11:34:38 Philinux kernel: [ 106.085250] python[1917]: segfault at 900c0c ip 0808e110 sp bf8c0530 error 4 in python2.6[8048000+1d3000] Nov 22 11:38:10 Philinux kernel: imklog 4.2.0, log source = /var/run/rsyslog/kmsg started.
Triggered a reboot: Nov 22 11:39:35 Philinux kernel: [ 113.942371] __ratelimit: 3 callbacks suppressed Nov 22 11:39:35 Philinux kernel: [ 113.942385] deskbar-applet[2308]: segfault at c35d5f9e ip 00d1ade7 sp bfafe724 error 5 in libc-2.10.1.so[c14000+13e000] Nov 22 11:40:03 Philinux kernel: [ 142.089533] BUG: Bad page map in process apport-checkrep pte:00c92025 pmd:32b91067 Nov 22 11:40:03 Philinux kernel: [ 142.089549] page:c104b240 flags:00000004 count:0 mapcount:-1 mapping:(null) index:0 Nov 22 11:40:03 Philinux kernel: [ 142.089559] addr:002e0000 vm_flags:08000075 anon_vma:(null) mapping:f6db833c index:df Nov 22 11:40:03 Philinux kernel: [ 142.089574] vma->vm_ops->fault: filemap_fault+0x0/0x340 Nov 22 11:40:03 Philinux kernel: [ 142.089582] vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x50 Nov 22 11:40:03 Philinux kernel: [ 142.089591] Pid: 2988, comm: apport-checkrep Tainted: P 2.6.31-15-generic #50-Ubuntu Nov 22 11:40:03 Philinux kernel: [ 142.089598] Call Trace: Nov 22 11:40:03 Philinux kernel: [ 142.089613] [<c01c8a89>] print_bad_pte+0x139/0x1f0 Nov 22 11:40:03 Philinux kernel: [ 142.089622] [<c01ca5e7>] zap_pte_range+0x3d7/0x3e0 Nov 22 11:40:03 Philinux kernel: [ 142.089631] [<c01ca866>] unmap_vmas+0x186/0x350 Nov 22 11:40:03 Philinux kernel: [ 142.089640] [<c01cf780>] exit_mmap+0xa0/0x160 Nov 22 11:40:03 Philinux kernel: [ 142.089651] [<c014361e>] mmput+0x2e/0xa0 Nov 22 11:40:03 Philinux kernel: [ 142.089659] [<c0147bb2>] exit_mm+0xe2/0x120 Nov 22 11:40:03 Philinux kernel: [ 142.089667] [<c0147ddc>] do_exit+0xfc/0x2e0 Nov 22 11:40:03 Philinux kernel: [ 142.089676] [<c01527dd>] ? dequeue_signal+0x2d/0x170 Nov 22 11:40:03 Philinux kernel: [ 142.089685] [<c0161dab>] ? sched_clock_cpu+0xeb/0x1a0 Nov 22 11:40:03 Philinux kernel: [ 142.089693] [<c0147ffa>] do_group_exit+0x3a/0xb0 Nov 22 11:40:03 Philinux kernel: [ 142.089702] [<c015403f>] get_signal_to_deliver+0x18f/0x300 Nov 22 11:40:03 Philinux kernel: [ 142.089712] [<c03b27b8>] ? scsi_finish_command+0x98/0x100 Nov 22 11:40:03 Philinux kernel: [ 142.089721] [<c010304b>] do_signal+0x6b/0x160 Nov 22 11:40:03 Philinux kernel: [ 142.089730] [<c0152f88>] ? send_signal+0x38/0x70 Nov 22 11:40:03 Philinux kernel: [ 142.089738] [<c0154227>] ? force_sig_info+0x77/0xc0 Nov 22 11:40:03 Philinux kernel: [ 142.089747] [<c015427f>] ? force_sig+0xf/0x20 Nov 22 11:40:03 Philinux kernel: [ 142.089756] [<c0571479>] ? do_trap+0xb9/0xc0 Nov 22 11:40:03 Philinux kernel: [ 142.089764] [<c010318d>] do_notify_resume+0x4d/0x60 Nov 22 11:40:03 Philinux kernel: [ 142.089772] [<c0103448>] work_notifysig+0x13/0x1b Nov 22 11:41:52 Philinux kernel: imklog 4.2.0, log source = /var/run/rsyslog/kmsg started. Triggered a reboot: Nov 22 11:42:28 Philinux pulseaudio[1842]: ratelimit.c: 1 events suppressed Nov 22 11:42:34 Philinux pulseaudio[1842]: ratelimit.c: 2 events suppressed Nov 22 11:42:57 Philinux kernel: [ 93.236038] Clocksource tsc unstable (delta = -165929002 ns) Nov 22 11:45:22 Philinux kernel: [ 238.053692] __ratelimit: 3 callbacks suppressed Nov 22 11:45:22 Philinux kernel: [ 238.053705] update-python-m[2997]: segfault at 97ba81c ip 0808e8db sp bfad1100 error 4 in python2.6[8048000+1d3000] In all three cases, the crash followed immediately a __ratelimit: 3 callbacks suppressed message. Even when the machine does not hard crash / freeze, I can see at least one desktop application crash (usually a segfault) for each reboot, during the time the desktop initializes. The crashing application varies from time to time. I have also seen several cases of a full freeze (or even a direct reboot) during the loading firefox. And one time, I had a full freeze (keyboard and soft power button dead) when the machine speakers produced a loud, random "static noise": A noise similar to that of a radio tuned to no station on a short AM waveband. It looks more and more to me that the problem is related to pulseaudio, but the next step would be to see if the problem still occurs with pulseaudio out of the way. Could anyone tell me how to prevent pulseaudio and all of its drivers to load at all at boot time? -- Karmic: frequent freezes https://bugs.launchpad.net/bugs/479296 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
