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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1320894

Title:
  usbaudio issues when powering on and off the device

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  [157242.574746] WARNING: CPU: 4 PID: 71 at /build/buildd/linux-3.13.0/fs/sysfs/group.c:214 sysfs_remove_group+0xc6/0xd0()
  [157242.574748] sysfs group ffffffff81cab480 not found for kobject 'card3'
  [157242.574750] Modules linked in: nls_utf8 isofs nls_iso8859_1 ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables rfcomm bnep bluetooth dm_crypt binfmt_misc gpio_ich intel_rapl x86_pkg_temp_thermal snd_hda_codec_hdmi coretemp kvm_intel kvm snd_hda_codec_realtek crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel snd_hda_intel aes_x86_64 snd_hda_codec lrw gf128mul hid_logitech_dj glue_helper ablk_helper snd_usb_audio cryptd snd_usbmidi_lib snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_page_alloc uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_core videodev snd_seq snd_seq_device snd_timer snd mei_me lpc_ich mei soundcore parport_pc ppdev mac_hid lp parport raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx hid_generic usbhid hid xor usb_storage raid6_pq raid1 raid0 multipath linear nouveau i915 mxm_wmi video ttm firewire_ohci i2c_algo_bit e1000e psmouse drm_kms_helper firewire_core drm ptp ahci libahci crc_itu_t pps_core wmi
  [157242.574822] CPU: 4 PID: 71 Comm: khubd Tainted: G        W    3.13.0-24-generic #47-Ubuntu
  [157242.574824] Hardware name: LENOVO 7052B9U/        , BIOS 9HKT47AUS 01/10/2012
  [157242.574825]  0000000000000009 ffff88042759fa60 ffffffff81715ac4 ffff88042759faa8
  [157242.574829]  ffff88042759fa98 ffffffff810676bd 0000000000000000 ffffffff81cab480
  [157242.574833]  ffff880426baac10 ffff880421cd3030 0000000000000000 ffff88042759faf8
  [157242.574837] Call Trace:
  [157242.574841]  [<ffffffff81715ac4>] dump_stack+0x45/0x56
  [157242.574845]  [<ffffffff810676bd>] warn_slowpath_common+0x7d/0xa0
  [157242.574848]  [<ffffffff8106772c>] warn_slowpath_fmt+0x4c/0x50
  [157242.574852]  [<ffffffff81230c8e>] ? sysfs_get_dirent_ns+0x4e/0x70
  [157242.574855]  [<ffffffff81231f76>] sysfs_remove_group+0xc6/0xd0
  [157242.574859]  [<ffffffff81494ed3>] dpm_sysfs_remove+0x43/0x50
  [157242.574863]  [<ffffffff8148a905>] device_del+0x45/0x1c0
  [157242.574866]  [<ffffffff8148aa9e>] device_unregister+0x1e/0x60
  [157242.574874]  [<ffffffffa041287f>] snd_card_disconnect+0x14f/0x1e0 [snd]
  [157242.574881]  [<ffffffffa04f6480>] usb_audio_disconnect+0x80/0x1b0 [snd_usb_audio]
  [157242.574886]  [<ffffffff81541d54>] usb_unbind_interface+0x64/0x1c0
  [157242.574891]  [<ffffffff8148e61f>] __device_release_driver+0x7f/0xf0
  [157242.574895]  [<ffffffff8148e6b3>] device_release_driver+0x23/0x30
  [157242.574899]  [<ffffffff8148df38>] bus_remove_device+0x108/0x180
  [157242.574902]  [<ffffffff8148a9e9>] device_del+0x129/0x1c0
  [157242.574906]  [<ffffffff8153f730>] usb_disable_device+0xb0/0x290
  [157242.574909]  [<ffffffff815342ad>] usb_disconnect+0xad/0x200
  [157242.574913]  [<ffffffff81536d65>] hub_port_connect_change+0xd5/0xb50
  [157242.574917]  [<ffffffff8153e134>] ? usb_control_msg+0xd4/0x110
  [157242.574920]  [<ffffffff81537ca4>] hub_events+0x4c4/0xa20
  [157242.574924]  [<ffffffff81538235>] hub_thread+0x35/0x160
  [157242.574928]  [<ffffffff810aae90>] ? prepare_to_wait_event+0x100/0x100
  [157242.574931]  [<ffffffff81538200>] ? hub_events+0xa20/0xa20
  [157242.574935]  [<ffffffff8108b312>] kthread+0xd2/0xf0
  [157242.574938]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0
  [157242.574942]  [<ffffffff817263fc>] ret_from_fork+0x7c/0xb0
  [157242.574945]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon May 19 09:18:06 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-04-22 (27 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 7052B9U
  ProcFB:
   0 nouveaufb
   1 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=4e81f491-6a97-49a1-91f2-756b22da2b99 ro quiet splash nomdmonddf nomdmonisw vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127.2
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/10/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9HKT47AUS
  dmi.board.vendor: LENOVO
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnLENOVO:bvr9HKT47AUS:bd01/10/2012:svnLENOVO:pn7052B9U:pvrThinkCentreM91p:rvnLENOVO:rn:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: 7052B9U
  dmi.product.version: ThinkCentre M91p
  dmi.sys.vendor: LENOVO

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