Thank you for taking the time to report this bug and helping to make Ubuntu 
better.
Could you please test the latest upstream kernel available (not the daily 
folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow 
additional upstream developers to examine the issue. Once you've tested the 
upstream kernel, please comment on which kernel version specifically you 
tested. If this bug is fixed in the mainline kernel, please add the following 
tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For 
example:
kernel-fixed-upstream-v3.13-rc1

This can be done by clicking on the yellow circle with a black pencil icon next 
to the word Tags located at the bottom of the bug description. As well, please 
remove the tag:
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If the mainline kernel does not fix this bug, please add the following tags:
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kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

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

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https://bugs.launchpad.net/bugs/1254581

Title:
  USB stops working after a while

Status in System76:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After leaving my workstation for a while, and then returning, my USB
  keyboard and USB mouse stop working.  Actually, all USB ports stop
  working.

  The peripherals are plugged into the USB hub on my monitor.  When I
  return, and the monitor wakes up, USB is dead.  Plugging them into
  other USB ports has no effect.

  As far as I can tell, the only way to fix this is to reboot.  Is there
  a better workaround, like removing and reinserting a kernel module?  I
  tried this with "ahci", but it gives me "Error: Module ahci is in
  use".  Having to reboot every time is quite bothersome.

  Here's what may be useful from the syslog:

  Nov 24 14:41:02 snake kernel: [108346.613267] xhci_hcd 0000:00:14.0: Timeout 
while waiting for address device command
  Nov 24 14:41:07 snake kernel: [108351.815323] xhci_hcd 0000:00:14.0: Timeout 
while waiting for address device command
  Nov 24 14:41:08 snake kernel: [108352.019314] usb 3-1.4: device not accepting 
address 112, error -62
  Nov 24 14:41:08 snake kernel: [108352.103502] usb 3-1.4: new high-speed USB 
device number 113 using xhci_hcd
  Nov 24 14:41:12 snake whoopsie[1274]: online
  Nov 24 14:41:13 snake kernel: [108357.101470] xhci_hcd 0000:00:14.0: Timeout 
while waiting for address device command
  Nov 24 14:41:18 snake kernel: [108362.303556] xhci_hcd 0000:00:14.0: Timeout 
while waiting for address device command
  Nov 24 14:41:18 snake kernel: [108362.507519] usb 3-1.4: device not accepting 
address 113, error -62
  Nov 24 14:41:24 snake kernel: [108368.513290] xhci_hcd 0000:00:14.0: xHCI 
host not responding to stop endpoint command.
  Nov 24 14:41:24 snake kernel: [108368.513301] xhci_hcd 0000:00:14.0: Assuming 
host is dying, halting host.
  Nov 24 14:41:24 snake kernel: [108368.513347] Bluetooth: hci0 urb 
ffff880403ba5540 failed to resubmit (22)
  Nov 24 14:41:24 snake kernel: [108368.513356] Bluetooth: hci0 urb 
ffff880403ba5e40 failed to resubmit (22)
  Nov 24 14:41:24 snake kernel: [108368.513362] Bluetooth: hci0 urb 
ffff880403e466c0 failed to resubmit (22)
  Nov 24 14:41:24 snake kernel: [108368.513384] hub 3-1:1.0: cannot disable 
port 4 (err = -110)
  Nov 24 14:41:24 snake kernel: [108368.513390] xhci_hcd 0000:00:14.0: HC died; 
cleaning up
  Nov 24 14:41:29 snake kernel: [108373.511466] xhci_hcd 0000:00:14.0: Timeout 
while waiting for a slot
  Nov 24 14:41:29 snake kernel: [108373.511475] xhci_hcd 0000:00:14.0: Abort 
the command ring, but the xHCI is dead.
  Nov 24 14:41:29 snake kernel: [108373.511498] xHCI xhci_free_dev called with 
unaddressed device
  Nov 24 14:41:34 snake kernel: [108378.509722] xhci_hcd 0000:00:14.0: Timeout 
while waiting for a slot
  Nov 24 14:41:34 snake kernel: [108378.509732] xhci_hcd 0000:00:14.0: Abort 
the command ring, but the xHCI is dead.
  Nov 24 14:41:34 snake kernel: [108378.509754] xHCI xhci_free_dev called with 
unaddressed device
  Nov 24 14:41:34 snake kernel: [108378.509792] usb 3-1: USB disconnect, device 
number 109
  Nov 24 14:41:34 snake kernel: [108378.509797] usb 3-1.1: USB disconnect, 
device number 110
  Nov 24 14:41:34 snake kernel: [108378.542604] usb 3-1.2: USB disconnect, 
device number 111
  Nov 24 14:41:34 snake bluetoothd[583]: Adapter /org/bluez/583/hci0 has been 
disabled
  Nov 24 14:41:34 snake bluetoothd[583]: Unregister path: /org/bluez/583/hci0
  Nov 24 14:41:34 snake bluetoothd[583]: Endpoint unregistered: sender=:1.70 
path=/MediaEndpoint/A2DPSink
  Nov 24 14:41:34 snake bluetoothd[583]: Endpoint unregistered: sender=:1.70 
path=/MediaEndpoint/A2DPSource
  Nov 24 14:41:34 snake bluetoothd[583]: Endpoint unregistered: sender=:1.70 
path=/MediaEndpoint/HFPAG
  Nov 24 14:41:34 snake bluetoothd[583]: Endpoint unregistered: sender=:1.70 
path=/MediaEndpoint/HFPHS
  Nov 24 14:41:34 snake kernel: [108378.634281] usb 3-2: USB disconnect, device 
number 13
  Nov 24 14:41:34 snake kernel: [108378.634593] usblp0: removed
  Nov 24 14:41:34 snake kernel: [108378.635507] usb 3-4: USB disconnect, device 
number 4
  Nov 24 14:41:34 snake kernel: [108378.637049] usb 3-10: USB disconnect, 
device number 5
  Nov 24 14:41:34 snake colord: device removed: sysfs-Generic-BisonCam__NB_Pro
  Nov 24 14:41:34 snake udev-configure-printer: remove 
/devices/pci0000:00/0000:00:14.0/usb3/3-2
  Nov 24 14:41:34 snake colord: device removed: sysfs-04f9-0217
  Nov 24 14:41:34 snake kernel: [108378.681797] usb 4-1: USB disconnect, device 
number 14
  Nov 24 14:41:34 snake kernel: [108378.681831] usb 4-1: Failed to set U1 
timeout to 0x0,error code -19
  Nov 24 14:41:34 snake kernel: [108378.681833] usb 4-1: Set SEL for 
device-initiated U1 failed.
  Nov 24 14:41:34 snake kernel: [108378.681835] usb 4-1: Set SEL for 
device-initiated U2 failed.
  Nov 24 14:41:34 snake kernel: [108378.681897] usb 4-1: Failed to set U1 
timeout to 0x0,error code -19
  Nov 24 14:41:34 snake kernel: [108378.681899] usb 4-1: Set SEL for 
device-initiated U1 failed.
  Nov 24 14:41:34 snake kernel: [108378.681901] usb 4-1: Set SEL for 
device-initiated U2 failed.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-13-generic 3.11.0-13.20
  ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
  Uname: Linux 3.11.0-13-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  colan      2408 F.... pulseaudio
   /dev/snd/controlC1:  colan      2408 F.... pulseaudio
   /dev/snd/pcmC1D0p:   colan      2408 F...m pulseaudio
   /dev/snd/controlC0:  colan      2408 F.... pulseaudio
  Date: Sun Nov 24 22:22:31 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=a9d32626-3b65-4683-a561-cb1c17e0fcba
  MachineType: System76, Inc. Galago UltraPro
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic 
root=UUID=9a35e457-d298-41c4-9274-a5e8eb9f78c5 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-13-generic N/A
   linux-backports-modules-3.11.0-13-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/09/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Galago UltraPro
  dmi.board.vendor: System76, Inc.
  dmi.board.version: galu1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: System76, Inc,
  dmi.chassis.version: galu1
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd07/09/2013:svnSystem76,Inc.:pnGalagoUltraPro:pvrgalu1:rvnSystem76,Inc.:rnGalagoUltraPro:rvrgalu1:cvnSystem76,Inc,:ct9:cvrgalu1:
  dmi.product.name: Galago UltraPro
  dmi.product.version: galu1
  dmi.sys.vendor: System76, Inc.

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