Public bug reported:

since the upgrade to kubuntu 12.10 my usb ports are not working properly
anymore. i can use a device that is plugged in while booting or is
plugged in shortly after booting.

if i plug the device in a bit (seconds?) later the device is not
detected and nothing shows in /var/log/syslog. similarly as soon as i
unplug/replug or suspend/resume the device is not detected.

the attached dmesg shows the follwing experiment

1) boot (until [99.4] )
2) wait a couple of seconds
3) plug in external mouse, nothing happens
4) perform the follwing commands from second [923] onwards (i think that 1a.7 
and 1d.7 are my two usb ports)
echo "0000:00:1a.7" > /sys/bus/pci/drivers/ehci_hcd/unbind
sleep 5
echo "0000:00:1d.7" > /sys/bus/pci/drivers/ehci_hcd/unbind
sleep 5
echo 1 > /sys/devices/pci0000\:00/0000\:00\:1d.7/remove
sleep 5
echo 1 > /sys/devices/pci0000\:00/0000\:00\:1a.7/remove
sleep 5
echo 1 > /sys/devices/pci0000\:00/pci_bus/0000\:00/rescan
5) plug in mouse in front usb port, works, unplug
6) plug in mouse in back usb port, works
7) suspend/wakup
8) mouse doesnt react
9) unplug/replug mouse, works

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-generic 3.5.0-17.28
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  peter      2902 F.... pulseaudio
CRDA:
 country DE:
        (2400 - 2483 @ 40), (N/A, 20)
        (5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
        (5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
        (5470 - 5725 @ 40), (N/A, 26), DFS
Date: Sun Nov 11 16:11:37 2012
InstallationDate: Installed on 2012-02-08 (276 days ago)
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Apple Inc. MacBook4,1
MarkForUpload: True
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic 
root=UUID=0e34c330-bddc-4b09-9a19-21d64bbd2d15 ro pcie_aspm=force 
i915.i915_enable_rc6=1 i915.lvds_downclock=1 i915.i915_enable_fbc=1 quiet 
splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-17-generic N/A
 linux-backports-modules-3.5.0-17-generic  N/A
 linux-firmware                            1.95
SourcePackage: linux
UpgradeStatus: Upgraded to quantal on 2012-10-20 (22 days ago)
dmi.bios.date: 02/09/08
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MB41.88Z.00C1.B00.0802091535
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F22788A9
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 2
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F22788A9
dmi.modalias: 
dmi:bvnAppleInc.:bvrMB41.88Z.00C1.B00.0802091535:bd02/09/08:svnAppleInc.:pnMacBook4,1:pvr1.0:rvnAppleInc.:rnMac-F22788A9:rvrPVT:cvnAppleInc.:ct2:cvrMac-F22788A9:
dmi.product.name: MacBook4,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug quantal

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https://bugs.launchpad.net/bugs/1077649

Title:
  usb ports not working since upgrade to kubuntu 12.10

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