Tonight I am being reminded several times per hour that something weird is happening here. I have a mouse and keyboard USB disconnect problem that has been hanging around for a couple of years now. Across the room where my old computer sits quietly running, the red light in the mouse keeps flashing as it goes off then comes back on, even though this computer is idle. So I checked /var/log/messages, and sure enough, messages appear there that correspond with the times the red light flashes. Messages like these crop up regularly and often in /var/log/messages Computer 1: Apr 24 02:47:40 geurig kernel: [1086766.208280] usb 5-1: New USB device found, idVendor=046d, idProduct=c03e Apr 24 02:47:40 geurig kernel: [1086766.208286] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Apr 24 02:47:40 geurig kernel: [1086766.208292] usb 5-1: Product: USB-PS/2 Optical Mouse Apr 24 02:47:40 geurig kernel: [1086766.208296] usb 5-1: Manufacturer: Logitech Apr 24 02:47:40 geurig kernel: [1086766.432055] __ratelimit: 1 messages suppressed Apr 24 02:48:13 geurig kernel: [1086799.620065] usb 5-1: USB disconnect, address 109 Apr 24 02:48:14 geurig kernel: [1086799.872028] usb 5-1: new low speed USB device using uhci_hcd and address 110 Apr 24 02:48:14 geurig kernel: [1086800.024007] usb 5-1: configuration #1 chosen from 1 choice Apr 24 02:48:14 geurig kernel: [1086800.065154] input: Logitech USB-PS/2 Optical Mouse as /class/input/input112 Apr 24 02:48:14 geurig kernel: [1086800.092124] input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:10.1-1 This PC is running Debian Lenny kernel 2.6.26-1-686. Same thing often used to happen with the USB keyboard, too. Now I'm using a PS2 keyboard in this PC, which does not result in these disconnect messages, but still seeing these messages about the mouse. Sometimes this happens over and over again many times within a short period of time (several times/minute). There were lockup problems related to this problem when I was running Etch, after this keyboard or mouse USB disconnect thing had disconnected and reconnected some large number of times, I think it was well over a hundred times. Keyboard and/or mouse would no longer accept input, forcing me to have to ssh in and reboot it, or if I couldn't do that, had to hard reboot. Restart X is not enough to fix this. This has happened with various different mice and keyboards. So we installed a USB card, thinking this might be a hardware problem with the USB ports, but no, the same problem crops up no matter if the mouse or keyboard is plugged into the card, or into the USB ports in the case. Then we thought it might be a problem in Etch, so we upgraded to Lenny. But it still happens. Also happens in Ubuntu. The latest issue (see below) was a long string of these disconnect/reconnects, then a lockup of the mouse and I believe keyboard. Had to ssh in to stop the problem (by shutting down). This new build is using my used hard drive, but I don't think that is relevant. Below is only a small piece of var/log/messages, where the problem seemed to change after several hours from the familiar mouse disconnect/reconnect, to something else. These mmessages were repeated many times (over a hundred): Apr 24 13:16:24 geurig kernel: [1124490.152288] usb 5-1: New USB device found, idVendor=046d, idProduct=c03e Apr 24 13:16:24 geurig kernel: [1124490.152294] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Apr 24 13:16:24 geurig kernel: [1124490.152300] usb 5-1: Product: USB-PS/2 Optical Mouse Apr 24 13:16:24 geurig kernel: [1124490.152304] usb 5-1: Manufacturer: Logitech Apr 24 13:17:24 geurig kernel: [1124550.713733] usb 5-1: USB disconnect, address 53 Apr 24 13:17:25 geurig kernel: [1124551.128022] usb 5-1: new low speed USB device using uhci_hcd and address 54 Apr 24 13:17:25 geurig kernel: [1124551.280008] usb 5-1: configuration #1 chosen from 1 choice Apr 24 13:17:25 geurig kernel: [1124551.324800] input: Logitech USB-PS/2 Optical Mouse as /class/input/input812 Apr 24 13:17:25 geurig kernel: [1124551.356089] input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:10.1-1 Apr 24 13:17:25 geurig kernel: [1124551.356251] usb 5-1: New USB device found, idVendor=046d, idProduct=c03e Apr 24 13:17:25 geurig kernel: [1124551.356257] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Apr 24 13:17:25 geurig kernel: [1124551.356263] usb 5-1: Product: USB-PS/2 Optical Mouse Apr 24 13:17:25 geurig kernel: [1124551.356267] usb 5-1: Manufacturer: Logitech Apr 24 13:18:26 geurig kernel: [1124611.968623] usb 5-1: USB disconnect, address 54 Apr 24 13:18:26 geurig kernel: [1124612.468024] usb 5-1: new low speed USB device using uhci_hcd and address 55 Apr 24 13:18:58 geurig kernel: [1124644.288028] usb 5-1: new low speed USB device using uhci_hcd and address 56 Apr 24 13:19:30 geurig kernel: [1124676.032024] usb 5-1: new low speed USB device using uhci_hcd and address 57 Apr 24 13:19:40 geurig kernel: [1124686.684056] usb 5-1: new low speed USB device using uhci_hcd and address 58 Apr 24 13:19:54 geurig kernel: [1124700.008027] uhci_hcd 0000:00:10.1: Controller not stopped yet! Apr 24 13:20:21 geurig kernel: [1124727.772025] usb 5-1: new low speed USB device using uhci_hcd and address 59 Apr 24 13:20:53 geurig kernel: [1124759.608024] usb 5-1: new low speed USB device using uhci_hcd and address 60 Apr 24 13:21:25 geurig kernel: [1124791.352042] usb 5-1: new low speed USB device using uhci_hcd and address 61 Apr 24 13:21:36 geurig kernel: [1124802.006763] usb 5-1: new low speed USB device using uhci_hcd and address 62 Apr 24 13:21:46 geurig kernel: [1124812.767430] __ratelimit: 29 messages suppressed Apr 24 13:21:50 geurig kernel: [1124816.008030] uhci_hcd 0000:00:10.1: Controller not stopped yet! Apr 24 13:22:17 geurig kernel: [1124843.804029] usb 5-1: new low speed USB device using uhci_hcd and address 63 Apr 24 13:22:49 geurig kernel: [1124875.424045] usb 5-1: new low speed USB device using uhci_hcd and address 64 Apr 24 13:23:21 geurig kernel: [1124907.168043] usb 5-1: new low speed USB device using uhci_hcd and address 65 Apr 24 13:23:31 geurig kernel: [1124917.820026] usb 5-1: new low speed USB device using uhci_hcd and address 66 Apr 24 13:23:45 geurig kernel: [1124931.012844] uhci_hcd 0000:00:10.1: Controller not stopped yet! This problem is not limited to this PC. Just built a brand new computer, and it's happening in the new computer, too, running Debian Lenny kernel 2.6.26-2-686 on a totally different motherboard. These two sets of entries show both keyboard and mouse events: Computer 2. Apr 19 23:14:31 lancer kernel: [261130.697577] usb 3-2: USB disconnect, address 62 Apr 19 23:14:32 lancer kernel: [261131.262914] usb 3-2: new low speed USB device using ohci_hcd and address 64 Apr 19 23:14:32 lancer kernel: [261131.453627] usb 3-2: configuration #1 chosen from 1 choice Apr 19 23:14:32 lancer kernel: [261131.465284] input: CHESEN USB Keyboard as /class/input/input59 Apr 19 23:14:32 lancer kernel: [261131.493292] input,hidraw1: USB HID v1.10 Keyboard [CHESEN USB Keyboard] on usb-0000:00:13.0-2 Apr 19 23:14:32 lancer kernel: [261131.501293] input: CHESEN USB Keyboard as /class/input/input60 Apr 19 23:14:32 lancer kernel: [261131.549291] input,hidraw2: USB HID v1.10 Device [CHESEN USB Keyboard] on usb-0000:00:13.0-2 Apr 19 23:14:32 lancer kernel: [261131.549291] usb 3-2: New USB device found, idVendor=0a81, idProduct=0101 Apr 19 23:14:32 lancer kernel: [261131.549291] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Apr 19 23:14:32 lancer kernel: [261131.549291] usb 3-2: Product: USB Keyboard Apr 19 23:14:32 lancer kernel: [261131.549291] usb 3-2: Manufacturer: CHESEN Apr 19 23:25:27 lancer kernel: [261787.827069] usb 3-2: USB disconnect, address 64 Apr 19 23:25:28 lancer kernel: [261788.160461] usb 3-2: new low speed USB device using ohci_hcd and address 65 Apr 19 23:25:28 lancer kernel: [261788.344991] usb 3-2: configuration #1 chosen from 1 choice Apr 19 23:25:28 lancer kernel: [261788.356166] input: CHESEN USB Keyboard as /class/input/input61 Apr 19 23:25:28 lancer kernel: [261788.384180] input,hidraw1: USB HID v1.10 Keyboard [CHESEN USB Keyboard] on usb-0000:00:13.0-2 Apr 19 23:25:28 lancer kernel: [261788.392173] input: CHESEN USB Keyboard as /class/input/input62 Apr 19 23:25:28 lancer kernel: [261788.448169] input,hidraw2: USB HID v1.10 Device [CHESEN USB Keyboard] on usb-0000:00:13.0-2 Apr 19 23:25:28 lancer kernel: [261788.448169] usb 3-2: New USB device found, idVendor=0a81, idProduct=0101 Apr 19 23:25:28 lancer kernel: [261788.448169] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Apr 19 23:25:28 lancer kernel: [261788.448169] usb 3-2: Product: USB Keyboard Apr 19 23:25:28 lancer kernel: [261788.448169] usb 3-2: Manufacturer: CHESEN -- and -- Apr 23 09:34:28 lancer kernel: [58666.642632] usb 1-1: USB disconnect, address 4 Apr 23 09:34:30 lancer kernel: [58668.138801] usb 1-1: new low speed USB device using ohci_hcd and address 7 Apr 23 09:34:30 lancer kernel: [58668.327037] usb 1-1: configuration #1 chosen from 1 choice Apr 23 09:34:30 lancer kernel: [58668.335045] input: USB Optical Mouse as /class/input/input6 Apr 23 09:34:30 lancer kernel: [58668.355048] input,hidraw2: USB HID v1.10 Mouse [USB Optical Mouse] on usb-0000:00:12.0-1 Apr 23 09:34:30 lancer kernel: [58668.355048] usb 1-1: New USB device found, idVendor=15ca, idProduct=00c3 Apr 23 09:34:30 lancer kernel: [58668.355048] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 Apr 23 09:34:30 lancer kernel: [58668.355048] usb 1-1: Product: USB Optical Mouse Had same problem in this new PC, running a recent Ubuntu Hardy (8.04) install. This PC is only a few weeks old, now with a fresh install of Lenny in its own partition. Only the hard drive and the DVD drive are not brand-new. I possibly (maybe?) solved the keyboard issue in this PC by specifying the correct type of keyboard in Settings > Peripherals > Keboard (in KDE). Not sure if it's really gone or not. But now getting hundreds of messages about the mouse, as above. Computer 3. It's also happening in my daughter's computer, that has the exact same motherboard and almost the same CPU as computer 2. Hers is running Ubuntu 8.04 2.6.24-23.52 (running Gnome), just updated last week. She has never complained about any lockup problem, but she reboots more often than I do. Apr 12 22:19:53 wanda kernel: [ 3543.266303] usb 1-2: USB disconnect, address 3 Apr 12 22:19:53 wanda kernel: [ 3543.348070] usb 1-2: new low speed USB device using ohci_hcd and address 4 Apr 12 22:19:53 wanda kernel: [ 3543.431718] usb 1-2: configuration #1 chosen from 1 choice Apr 12 22:19:53 wanda kernel: [ 3543.446738] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:12.0/usb1/1-2/1-2:1.0/input/input6 Apr 12 22:19:53 wanda kernel: [ 3543.465380] input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:12.0-2 Apr 12 22:22:09 wanda kernel: [ 3595.885419] usb 1-2: USB disconnect, address 4 Apr 12 22:22:10 wanda kernel: [ 3595.973146] usb 1-2: new low speed USB device using ohci_hcd and address 5 Apr 12 22:22:10 wanda kernel: [ 3596.056975] usb 1-2: configuration #1 chosen from 1 choice Apr 12 22:22:10 wanda kernel: [ 3596.059711] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:12.0/usb1/1-2/1-2:1.0/input/input7 Apr 12 22:22:10 wanda kernel: [ 3596.079690] input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:12.0-2 Computer 4. I believe this also happens in the laptop, a Dell Inspiron 1525n, running (now) Ubuntu Hardy (this came with Ubuntu 7.10 pre-uinstalled). Cannot post /var/log/messages from this today, since this laptop is away with daughter. But the same messages appear in that one, too. Has anyone run into this before, and if so, did you get it fixed? Thanks very much, Liz J