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[Robert Ancell <robert.ancell@xxxxxxxxxxxxx>]

4.0.0-040000-generic - WWW
4.1.0-040100-generic - WWW

So that suggests to me the issue came between 4.1 and 4.2-rc1.

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https://bugs.launchpad.net/bugs/1498667

Title:
  [Toshiba P50W-B00F] Touchscreen no longer working

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Sometime in the last month or so my touchscreen stopped working on my
  Toshiba P50W. The dmesg log shows it constantly reconnecting to it:

  [  556.407964] usb 1-4: new full-speed USB device number 119 using xhci_hcd
  [  556.538341] usb 1-4: New USB device found, idVendor=04f3, idProduct=0381
  [  556.538347] usb 1-4: New USB device strings: Mfr=4, Product=14, SerialNumber=0
  [  556.538349] usb 1-4: Product: Touchscreen
  [  556.538351] usb 1-4: Manufacturer: ELAN
  [  556.538505] usb 1-4: ep 0x2 - rounding interval to 64 microframes, ep desc says 80 microframes
  [  556.547788] input: ELAN Touchscreen as /devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/0003:04F3:0381.04A1/input/input2374
  [  556.600478] hid-multitouch 0003:04F3:0381.04A1: input,hiddev0,hidraw4: USB HID v1.10 Device [ELAN Touchscreen] on usb-0000:00:14.0-4/input0
  [  556.600584] usb 1-4: USB disconnect, device number 119

  [  556.860456] usb 1-4: new full-speed USB device number 120 using xhci_hcd
  [  556.990494] usb 1-4: New USB device found, idVendor=04f3, idProduct=0381
  [  556.990500] usb 1-4: New USB device strings: Mfr=4, Product=14, SerialNumber=0
  [  556.990503] usb 1-4: Product: Touchscreen
  [  556.990506] usb 1-4: Manufacturer: ELAN
  [  556.990755] usb 1-4: ep 0x2 - rounding interval to 64 microframes, ep desc says 80 microframes
  [  557.001248] input: ELAN Touchscreen as /devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.0/0003:04F3:0381.04A2/input/input2376
  [  557.002517] hid-multitouch 0003:04F3:0381.04A2: input,hiddev0,hidraw4: USB HID v1.10 Device [ELAN Touchscreen] on usb-0000:00:14.0-4/input0
  [  557.013831] usb 1-4: USB disconnect, device number 120

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-11-generic 4.2.0-11.13
  ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
  Uname: Linux 4.2.0-11-generic x86_64
  ApportVersion: 2.18.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bob        2041 F.... pulseaudio
   /dev/snd/controlC0:  bob        2041 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep 23 09:46:25 2015
  HibernationDevice: RESUME=UUID=5033984a-21af-482d-a1fd-c075e818cd12
  InstallationDate: Installed on 2013-12-26 (635 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: TOSHIBA Satellite P50W-B
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-11-generic root=UUID=885f0f10-b818-4eb4-8ff4-d067e16bef2f ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-11-generic N/A
   linux-backports-modules-4.2.0-11-generic  N/A
   linux-firmware                            1.148
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2013-12-26 (635 days ago)
  dmi.bios.date: 08/08/2014
  dmi.bios.vendor: INSYDE Corp.
  dmi.bios.version: 1.40
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: Type2 - Board Product Name1
  dmi.board.vendor: Type2 - Board Vendor Name1
  dmi.board.version: Type2 - Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: OEM Chassis ManuFacturer
  dmi.chassis.version: OEM Chassis Version
  dmi.modalias: dmi:bvnINSYDECorp.:bvr1.40:bd08/08/2014:svnTOSHIBA:pnSatelliteP50W-B:pvrPSVP2A-00F002:rvnType2-BoardVendorName1:rnType2-BoardProductName1:rvrType2-BoardVersion:cvnOEMChassisManuFacturer:ct10:cvrOEMChassisVersion:
  dmi.product.name: Satellite P50W-B
  dmi.product.version: PSVP2A-00F002
  dmi.sys.vendor: TOSHIBA

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