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Title: Traceback when unplugging USB port replicator Status in linux package in Ubuntu: Fix Released Bug description: I have a lenovo USB 2.0 port replicator with Digtial Video (MODEL #VDK8736). I discovered that whenever I unplugged my port replicator, there would be a kernel traceback. My laptop has a VGA port which I plug an external monitor into, and I use the port replicator for network, keyboard, mouse, and sound (ie, I don't use the digital video on the port replicator). This configuration works fine until I unplug the port replicator and I get a traceback (see attached logs). The system is mostly usable in this state, though it can cause problems later with suspend/resume/unlock where the screensaver sometimes can't receive input. I can still trigger the traceback if I only use the port replicator without using an external monitor. Booting into the linux-image-3.12.0-2-generic (3.12.0-2.7), I don't get a traceback when unplugging the port replicator. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-18-generic 3.13.0-18.38 ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6 Uname: Linux 3.13.0-18-generic x86_64 ApportVersion: 2.13.3-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jamie 2869 F.... pulseaudio CurrentDesktop: Unity Date: Fri Mar 21 07:03:38 2014 HibernationDevice: RESUME=UUID=c4c5dbc0-d41a-428d-8af4-b680b67dd3dc InstallationDate: Installed on 2011-06-28 (996 days ago) InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110425.2) Lsusb: Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: LENOVO 5129CTO ProcFB: 0 inteldrmfb 1 udldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-18-generic root=UUID=88689ad2-74b5-442c-9290-8ae60b63e16b ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-18-generic N/A linux-backports-modules-3.13.0-18-generic N/A linux-firmware 1.126 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2013-11-04 (136 days ago) dmi.bios.date: 02/24/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET64WW (1.34 ) dmi.board.name: 5129CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6QET64WW(1.34):bd02/24/2011:svnLENOVO:pn5129CTO:pvrThinkPadX201s:rvnLENOVO:rn5129CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 5129CTO dmi.product.version: ThinkPad X201s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1295646/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp