I have similar behavior. I am on 11.10, and have seen this for a couple of years (certainly 10.04, maybe 9.04). For me it is a keyboard and mouse plugged into my ThinkPad docking station that die. If I plug them into my laptop's ports, they work fine. I also occasionally have my laptop's keyboard and trackpoint die in the same way, in which case I have to reboot. All works fine after reboot, at least for a while. Like the OP, it's random and hard to reproduce. Unlike the OP, I've never once had it start working again. lsusb -v segfaults when this happens:
# lsusb -v Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Couldn't open device, some information will be missing Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 9 Hub bDeviceSubClass 0 Unused bDeviceProtocol 0 Full speed (or root) hub bMaxPacketSize0 64 idVendor 0x1d6b Linux Foundation idProduct 0x0002 2.0 root hub bcdDevice 3.00 iManufacturer 3 iProduct 2 iSerial 1 bNumConfigurations 1 Segmentation fault Note the warning after the first line of text. Sadly, it doesn't say which device it is looking for. When this happens, there is a light on the lid that turns on. It has a square with three dots in a triangle shape in it. That light never lights for any other reason. Currently the audio port on the laptop (but not the ports on the dock) do not work, speakers do work, and the camera does not work. I suspect this is because of the USB problem. Generally they work fine. Finally, I am on a ThinkPad W510, and was on a T61 before this with the same problem. Linux glup 3.0.0-26-generic #42-Ubuntu SMP Wed Sep 5 08:37:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Ubuntu 3.0.0-26.42-generic 3.0.42 Note that this is both a mouse and a keyboard, and now maybe other devices, but not flash drives. The same devices work ok in different USB ports, but it's less convenient if the dock ports don't work and really bad if the camera and audio stop working. It's happened with different keyboards and mice. Thanks, --jh-- ** Attachment added: "lspci-vvnn" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1016267/+attachment/3373363/+files/lspci-vvnn -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1016267 Title: 0458:003a USB mouse stops working after unplug/replug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1016267/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
