Here are some hints about frequency of occurrence. ( cd /var/log/ ; zgrep "Oops" $( ls -1b syslog syslog.1 syslog.?.gz syslog.??.gz syslog.???.gz | tac ; ) ; ) syslog.91.gz:Feb 23 14:53:20 n55sf-l kernel: [35002.379231] Oops: 0002 [#1] SMP syslog.85.gz:Mar 1 13:47:35 n55sf-l kernel: [68865.856716] Oops: 0002 [#1] SMP syslog.68.gz:Mar 28 12:54:24 n55sf-l kernel: [23266.494142] Oops: 0002 [#1] SMP syslog.67.gz:Mar 29 20:21:43 n55sf-l kernel: [11758.414392] Oops: 0002 [#1] SMP syslog.59.gz:Apr 8 21:33:06 n55sf-l kernel: [ 5516.858854] Oops: 0002 [#1] SMP syslog.58.gz:Apr 9 12:01:16 n55sf-l kernel: [14994.873453] Oops: 0002 [#1] SMP syslog.58.gz:Apr 9 21:38:43 n55sf-l kernel: [34407.716338] Oops: 0002 [#1] SMP syslog.57.gz:Apr 10 16:51:33 n55sf-l kernel: [30054.201816] Oops: 0002 [#1] SMP syslog.31.gz:May 9 08:26:27 n55sf-l kernel: [184444.450319] Oops: 0002 [#1] SMP syslog.26.gz:May 14 15:11:42 n55sf-l kernel: [268666.886048] Oops: 0002 [#1] SMP syslog.18.gz:May 22 09:51:16 n55sf-l kernel: [328070.610715] Oops: 0002 [#1] SMP syslog.18.gz:May 22 18:16:48 n55sf-l kernel: [14544.693352] Oops: 0002 [#1] SMP syslog.10.gz:May 30 22:50:54 n55sf-l kernel: [68868.692654] Oops: 0002 [#1] SMP
May 30 22:50:54 n55sf-l kernel: [68868.692631] BUG: unable to handle kernel NULL pointer dereference at 0000000000000040 May 30 22:50:54 n55sf-l kernel: [68868.692642] IP: [<ffffffff814d86d3>] xhci_free_dev+0x63/0x160 May 30 22:50:54 n55sf-l kernel: [68868.692650] PGD 0 May 30 22:50:54 n55sf-l kernel: [68868.692654] Oops: 0002 [#1] SMP May 30 22:50:54 n55sf-l kernel: [68868.692659] CPU 2 May 30 22:50:54 n55sf-l kernel: [68868.692661] Modules linked in: bbswitch(O) pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) rfcomm parport_pc ppdev bnep binfmt_misc nls_iso8859_1 dm_crypt arc4 ath9k mac80211 uvcvideo snd_hda_codec_realtek snd_hda_intel videobuf2_core ath9k_common videodev ath9k_hw snd_hda_codec videobuf2_vmalloc snd_hwdep snd_pcm videobuf2_memops ath ath3k snd_seq_midi joydev btusb snd_rawmidi bluetooth snd_seq_midi_event snd_seq kvm_intel snd_timer mei snd_seq_device kvm mac_hid asus_nb_wmi lpc_ich asus_wmi snd cfg80211 mxm_wmi soundcore sparse_keymap microcode psmouse wmi snd_page_alloc serio_raw coretemp lp parport usb_storage hid_generic usbhid hid ghash_clmulni_intel cryptd i915 drm_kms_helper ahci libahci atl1c drm i2c_algo_bit video May 30 22:50:54 n55sf-l kernel: [68868.692733] May 30 22:50:54 n55sf-l kernel: [68868.692735] Pid: 46, comm: khubd Tainted: G W O 3.5.0-31-generic #52-Ubuntu ASUSTeK Computer Inc. N55SF/N55SF -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1132129 Title: Kernel crash and oops since 3.5.0-24-generic (3.5.0-23 ok). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1132129/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs