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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Benedikt, could you please boot into the default Ubuntu kernel (not a mainline one) and then execute the following:
apport-collect 1439694

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Title:
  Can not connect to Nexus 4 device (Android 5.1)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I can not connect to an nexus 4 device with current vivid. I see the
  following messages in syslog:

  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.132021] usb 1-3: new high-speed USB device number 16 using xhci_hcd
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.261235] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.261241] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.261243] usb 1-3: Product: Nexus 4
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.261245] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.261248] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.276487] usb 1-3: USB disconnect, device number 16
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.548230] usb 1-3: new high-speed USB device number 17 using xhci_hcd
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.677291] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.677296] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.677298] usb 1-3: Product: Nexus 4
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.677300] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.677301] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.689716] usb 1-3: USB disconnect, device number 17
  Apr  2 15:16:39 benediktZ50-70 kernel: [ 3492.960443] usb 1-3: new high-speed USB device number 18 using xhci_hcd
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.089519] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.089524] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.089526] usb 1-3: Product: Nexus 4
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.089528] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.089529] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:40 benediktZ50-70 mtp-probe: checking bus 1, device 18: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-3"
  Apr  2 15:16:40 benediktZ50-70 mtp-probe: bus: 1, device: 18 was not an MTP device
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.103095] usb 1-3: USB disconnect, device number 18
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.372719] usb 1-3: new high-speed USB device number 19 using xhci_hcd
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.501867] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.501872] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.501874] usb 1-3: Product: Nexus 4
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.501876] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.501877] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.525156] usb 1-3: USB disconnect, device number 19
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.796966] usb 1-3: new high-speed USB device number 20 using xhci_hcd
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.925705] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.925709] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.925711] usb 1-3: Product: Nexus 4
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.925712] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.925714] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:40 benediktZ50-70 kernel: [ 3493.937356] usb 1-3: USB disconnect, device number 20
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.209206] usb 1-3: new high-speed USB device number 21 using xhci_hcd
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.338672] usb 1-3: New USB device found, idVendor=18d1, idProduct=4ee7
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.338677] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.338679] usb 1-3: Product: Nexus 4
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.338681] usb 1-3: Manufacturer: LGE
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.338682] usb 1-3: SerialNumber: 007a279647d4254f
  Apr  2 15:16:41 benediktZ50-70 mtp-probe: checking bus 1, device 21: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-3"
  Apr  2 15:16:41 benediktZ50-70 mtp-probe: bus: 1, device: 21 was not an MTP device
  Apr  2 15:16:41 benediktZ50-70 kernel: [ 3494.351098] usb 1-3: USB disconnect, device number 21

  I will test with a new upstream kernel shortly.
  --- 
  ApportVersion: 2.17-0ubuntu1
  Architecture: amd64
  DistroRelease: Ubuntu 15.04
  InstallationDate: Installed on 2014-12-21 (102 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141218)
  Package: linux (not installed)
  Tags:  vivid
  Uname: Linux 4.0.0-rc6+ x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True

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