Looking back through my dmesg, it looks like the last messages there regarding USB are from when I had my phone plugged in to the USB and it looks like some USB subsystem crashed:
[11262.908000] usb 1-4: new full speed USB device using ohci_hcd and address 6 [11263.092000] usb 1-4: device descriptor read/64, error -62 [11263.380000] usb 1-4: device descriptor read/64, error -62 [11278.872000] usb 1-4: new full speed USB device using ohci_hcd and address 8 [11279.108000] usb 1-4: configuration #1 chosen from 1 choice [11279.384000] usbcore: registered new interface driver libusual [11279.420000] Initializing USB Mass Storage driver... [11279.420000] scsi6 : SCSI emulation for USB Mass Storage devices [11279.420000] usbcore: registered new interface driver usb-storage [11279.420000] usb-storage: device found at 8 [11279.420000] usb-storage: waiting for device to settle before scanning [11279.420000] USB Mass Storage support registered. [11284.424000] usb-storage: device scan complete [11288.016000] scsi 6:0:0:0: Direct-Access Motorola Z3 2.31 PQ: 0 ANSI: 2 [11288.276000] SCSI device sdb: 246017 512-byte hdwr sectors (126 MB) [11310.628000] usb 1-4: reset full speed USB device using ohci_hcd and address 8 [11310.812000] usb 1-4: device descriptor read/64, error -62 [11311.100000] usb 1-4: device descriptor read/64, error -62 [11311.380000] usb 1-4: reset full speed USB device using ohci_hcd and address 8 [11311.620000] usb 1-4: USB disconnect, address 8 [11311.620000] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000 [11311.620000] printing eip: [11311.620000] c0258315 [11311.620000] *pde = 00000000 [11311.620000] Oops: 0000 [#1] [11311.620000] SMP [11311.620000] Modules linked in: usb_storage libusual snd_rtctimer vmnet(P) vmmon(P) binfmt_misc rfcomm l2cap bluetooth ppdev powernow_k8 cpufreq_powersave cpufreq_conservative cpufreq_userspace cpufreq_ondemand cpufreq_stats freq_table pcc_acpi tc1100_wmi sony_acpi dev_acpi button ac ipv6 sbs i2c_ec dock battery video container asus_acpi backlight sbp2 lp fuse snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_emu10k1 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_util_mem snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd wlan_scan_sta xpad nvidia(P) agpgart soundcore ath_rate_sample af_packet sr_mod cdrom ath_pci wlan emu10k1_gp gameport pcspkr ath_hal(P) k8temp parport_pc parport shpchp pci_hotplug i2c_nforce2 i2c_core evdev tsdev ext3 jbd mbcache sg sd_mod pata_amd generic ata_generic usbhid hid floppy ohci1394 ieee1394 forcedeth ehci_hcd sata_nv libata scsi_mod ohci_hcd usbcore thermal processor fan fbcon tileblit font bitblit softcursor vesafb capability commoncap [11311.620000] CPU: 0 [11311.620000] EIP: 0060:[<c0258315>] Tainted: P VLI [11311.620000] EFLAGS: 00010202 (2.6.20-15-generic #2) [11311.620000] EIP is at make_class_name+0x35/0xa0 [11311.620000] eax: 00000000 ebx: ffffffff ecx: ffffffff edx: 0000000b [11311.620000] esi: f88dbc91 edi: 00000000 ebp: 00000000 esp: dfa0fe50 [11311.620000] ds: 007b es: 007b ss: 0068 [11311.620000] Process khubd (pid: 2024, ti=dfa0e000 task=df9ef560 task.ti=dfa0e000) [11311.620000] Stack: f4e0b204 f88edec0 f4e0b1fc f4e0b204 f88ede40 c0258591 00000000 f88edec8 [11311.620000] f4e0b1fc d7694800 00000246 ffffffed c0258618 f4e0b000 f88d5a50 f4e0b000 [11311.620000] d7694800 f88d312b d7694830 d7694800 f88cd825 d7694af4 f7c0aa18 f8f40f60 [11311.620000] Call Trace: [11311.620000] [<c0258591>] class_device_del+0xa1/0x120 [11311.620000] [<c0258618>] class_device_unregister+0x8/0x10 [11311.620000] [<f88d5a50>] __scsi_remove_device+0x30/0x80 [scsi_mod] [11311.620000] [<f88d312b>] scsi_forget_host+0x4b/0x60 [scsi_mod] [11311.620000] [<f88cd825>] scsi_remove_host+0x55/0xe0 [scsi_mod] [11311.620000] [<f8f32cae>] storage_disconnect+0xe/0x20 [usb_storage] [11311.620000] [<f8885d20>] usb_unbind_interface+0x50/0xa0 [usbcore] [11311.620000] [<c02578a8>] __device_release_driver+0x68/0xa0 [11311.620000] [<c0257dd3>] device_release_driver+0x23/0x40 [11311.620000] [<c025721c>] bus_remove_device+0x5c/0x90 [11311.620000] [<c0255672>] device_del+0x152/0x1b0 [11311.620000] [<f88831ee>] usb_disable_device+0x7e/0xe0 [usbcore] [11311.620000] [<f887f597>] usb_disconnect+0x97/0x130 [usbcore] [11311.620000] [<f88802ff>] hub_thread+0x26f/0xc20 [usbcore] [11311.620000] [<c013adf0>] autoremove_wake_function+0x0/0x50 [11311.620000] [<f8880090>] hub_thread+0x0/0xc20 [usbcore] [11311.620000] [<c013ac3a>] kthread+0xba/0xf0 [11311.620000] [<c013ab80>] kthread+0x0/0xf0 [11311.620000] [<c01044c7>] kernel_thread_helper+0x7/0x10 [11311.620000] ======================= [11311.620000] Code: ff ff 89 6c 24 10 31 ed 89 d9 89 74 24 08 89 c6 89 7c 24 0c 89 c7 89 e8 89 14 24 f2 ae f7 d1 49 8b 04 24 89 ca 89 d9 8b 38 89 e8 <f2> ae f7 d1 49 8d 44 0a 02 ba d0 00 00 00 e8 38 ae f1 ff ba f4 [11311.620000] EIP: [<c0258315>] make_class_name+0x35/0xa0 SS:ESP 0068:dfa0fe50 [11311.620000] <5>sdb: Write Protect is off [11311.624000] sdb: Mode Sense: 00 00 00 00 [11311.624000] sdb: assuming drive cache: write through [11311.624000] sdb : READ CAPACITY failed. [11311.624000] sdb : status=0, message=00, host=1, driver=00 [11311.624000] sdb : sense not available. [11311.624000] sdb: Write Protect is off [11311.624000] sdb: Mode Sense: 00 00 00 00 [11311.624000] sdb: assuming drive cache: write through [11311.624000] sdb : READ CAPACITY failed. [11311.624000] sdb : status=0, message=00, host=1, driver=00 [11311.624000] sdb : sense not available. [11311.624000] sdb: Write Protect is off [11311.624000] sdb: Mode Sense: 00 00 00 00 [11311.624000] sdb: assuming drive cache: write through [11311.624000] sd 6:0:0:0: Attached scsi removable disk sdb [11311.624000] sd 6:0:0:0: Attached scsi generic sg2 type 0 [11311.656000] sdb : READ CAPACITY failed. [11311.656000] sdb : status=0, message=00, host=1, driver=00 [11311.656000] sdb : sense not available. [11311.656000] sdb: Write Protect is off [11311.656000] sdb: Mode Sense: 00 00 00 00 [11311.656000] sdb: assuming drive cache: write through [11311.656000] sdb : READ CAPACITY failed. [11311.656000] sdb : status=0, message=00, host=1, driver=00 [11311.656000] sdb : sense not available. [11311.656000] sdb: Write Protect is off [11311.656000] sdb: Mode Sense: 00 00 00 00 [11311.656000] sdb: assuming drive cache: write through [11311.660000] sdb : READ CAPACITY failed. [11311.660000] sdb : status=0, message=00, host=1, driver=00 [11311.660000] sdb : sense not available. [11311.660000] sdb: Write Protect is off [11311.660000] sdb: Mode Sense: 00 00 00 00 [11311.660000] sdb: assuming drive cache: write through [11311.660000] sdb : READ CAPACITY failed. [11311.660000] sdb : status=0, message=00, host=1, driver=00 [11311.660000] sdb : sense not available. [11311.660000] sdb: Write Protect is off [11311.660000] sdb: Mode Sense: 00 00 00 00 [11311.660000] sdb: assuming drive cache: write through -- usb flash drive not working. Lsusb hangs with no output. https://bugs.launchpad.net/bugs/77971 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
