I no longer have the machine in question immediately accessible unfortunately. Perhaps someone else has a machine with the same problem?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/966151 Title: Kernel oops when unplugging USB devices Status in The Linux Kernel: Incomplete Status in “linux” package in Ubuntu: Confirmed Bug description: I have a keyboard and USB wifi dongle attached to a USB hub which is attached via a cable to my PC. I noticed the keyboard stopped responding so reached for the USB hub and unplugged it. Instantly got a kernel oops screen. [ 9881.300460] usb 1-1.1.4: USB disconnect, device number 6 [ 9881.300462] usb 1-1.1.4.3: USB disconnect, device number 7 [ 9881.302713] usb 1-1.1.4: clear tt 1 (0070) error -71 [ 9881.558614] usb 1-1.1.4.4: USB disconnect, device number 8 [ 9881.797709] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 [ 9881.797750] IP: [<ffffffffa02766e4>] r8712_read32+0x14/0x20 [r8712u] [ 9881.797785] PGD 0 [ 9881.797796] Oops: 0000 [#1] SMP [ 9881.797814] CPU 5 [ 9881.797824] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables xt_state ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter pci_stub vboxpci(O) ipt_MASQUERADE vboxnetadp(O) iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables vboxnetflt(O) x_tables vboxdrv(O) bridge stp snd_hda_codec_hdmi snd_hda_codec_realtek rfcomm bnep bluetooth binfmt_misc snd_hda_intel snd_hda_codec snd_ctxfi uvcvideo videodev v4l2_compat_ioctl32 i915 snd_usb_audio snd_hwdep snd_usbmidi_lib snd_seq_midi r8712u(C) snd_pcm joydev drm_kms_helper snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device drm snd lp i2c_algo_bit soundcore ppdev snd_page_alloc video shpchp parport_pc parport mei(C) psmouse mac_hid serio_raw r8169 usbhid hid btrfs zlib_deflate libcrc32c [last unloaded: kvm] [ 9881.798213] [ 9881.798223] Pid: 1225, comm: wlan1 Tainted: G C O 3.2.0-20-generic #32-Ubuntu MSI MS-7680/H61M-E23 (MS-7680) [ 9881.798268] RIP: 0010:[<ffffffffa02766e4>] [<ffffffffa02766e4>] r8712_read32+0x14/0x20 [r8712u] [ 9881.798308] RSP: 0018:ffff88022f659e10 EFLAGS: 00010246 [ 9881.798330] RAX: 0000000000000000 RBX: ffff880219ab38a0 RCX: 0000000000000005 [ 9881.798359] RDX: 0000000000000000 RSI: 0000000010250370 RDI: 0000000000000048 [ 9881.798387] RBP: ffff88022f659e10 R08: ffff88022f658000 R09: 000000000000035a [ 9881.798415] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8802308b8780 [ 9881.798443] R13: 000000000000001d R14: ffff8802308b8dd8 R15: ffff8802315fee00 [ 9881.798472] FS: 0000000000000000(0000) GS:ffff88023fb40000(0000) knlGS:0000000000000000 [ 9881.798504] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 9881.798527] CR2: 00000000000000a8 CR3: 0000000001c05000 CR4: 00000000000406e0 [ 9881.798554] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 9881.798582] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 9881.798611] Process wlan1 (pid: 1225, threadinfo ffff88022f658000, task ffff88023085dbc0) [ 9881.798643] Stack: [ 9881.798652] ffff88022f659e40 ffffffffa026f5b8 ffff88022f659e50 ffff880036e20dc0 [ 9881.798689] ffff8802308b8780 ffff8802308b8e08 ffff88022f659e80 ffffffffa026f659 [ 9881.798726] 0000000000000286 ffff8802308b8e18 ffff88022f659e80 ffff8802308b8780 [ 9881.798763] Call Trace: [ 9881.798781] [<ffffffffa026f5b8>] r871x_internal_cmd_hdl+0x98/0xe0 [r8712u] [ 9881.798811] [<ffffffffa026f659>] cmd_hdl_filter+0x59/0x120 [r8712u] [ 9881.798841] [<ffffffffa026f899>] r8712_cmd_thread+0xb9/0x250 [r8712u] [ 9881.798870] [<ffffffffa026f7e0>] ? r8712_fw_cmd_data+0x50/0x50 [r8712u] [ 9881.798898] [<ffffffff8108a45c>] kthread+0x8c/0xa0 [ 9881.798922] [<ffffffff81666674>] kernel_thread_helper+0x4/0x10 [ 9881.798947] [<ffffffff8108a3d0>] ? flush_kthread_worker+0xa0/0xa0 [ 9881.798973] [<ffffffff81666670>] ? gs_change+0x13/0x13 [ 9881.798993] Code: 48 8b 87 40 07 00 00 48 8d 78 48 ff 90 a0 00 00 00 5d c3 0f 1f 40 00 55 48 89 e5 66 66 66 66 90 48 8b 87 40 07 00 00 48 8d 78 48 <ff> 90 a8 00 00 00 5d c3 0f 1f 40 00 55 48 89 e5 66 66 66 66 90 [ 9881.799134] RIP [<ffffffffa02766e4>] r8712_read32+0x14/0x20 [r8712u] [ 9881.799157] RSP <ffff88022f659e10> [ 9881.799167] CR2: 00000000000000a8 [ 9881.864461] ---[ end trace c202cdf2a0fe8bfd ]--- ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-20-generic 3.2.0-20.32 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: aplay: device_list:252: no soundcards found... ApportVersion: 1.95-0ubuntu1 Architecture: amd64 ArecordDevices: arecord: device_list:252: no soundcards found... CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Date: Tue Mar 27 12:38:40 2012 HibernationDevice: RESUME=UUID=9b3ebbe4-b26e-41d8-935f-7a88c47ea356 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120102) MachineType: MSI MS-7680 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=3d53ca44-6af4-422d-b1b0-adf30c679a2f ro quiet splash vt.handoff=7 RfKill: SourcePackage: linux StagingDrivers: r8712u mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/23/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V10.8 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: H61M-E23 (MS-7680) dmi.board.vendor: MSI dmi.board.version: 2.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 2.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV10.8:bd05/23/2011:svnMSI:pnMS-7680:pvr2.0:rvnMSI:rnH61M-E23(MS-7680):rvr2.0:cvnMSI:ct3:cvr2.0: dmi.product.name: MS-7680 dmi.product.version: 2.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/966151/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
