I have the stuck keys problem as well.  Every time it happens, I get a
syslog message like this:

  usb 2-1: reset low speed USB device using uhci_hcd and address 3

The usb device in question is my Logitech MouseMan Wheel, model number
B-BD53.  I have never seen this happen when I plug it in using its usb
to ps2 adapter, only when I plug directly into one of my computer's usb
ports.

I first noticed the problem while typing in a terminal window and
running a virtual machine in the background.  However, it definitely
happens even while my computer is idle.  (The log entries below were
written during idle time.)

"carlosbrolotobar" on ubuntuforums.org has the same problem, also correlated 
with usb device reset messages:
http://ubuntuforums.org/showpost.php?p=4610774&postcount=22

Some general hardware info:
ps/2 keyboard
intel penryn core 2 duo cpu
Intel P35/ICH9 chipset

Some software info:
Ubuntu 8.04 (Hardy Heron)
Linux heron 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux
X.Org X Server 1.4.0.90
nVidia proprietary driver 169.12
xfce 4.4.2

A longer syslog excerpt, starting when I plugged in my mouse:
May 15 20:49:08 heron kernel: [ 2628.533383] usb 2-1: new low speed USB device 
using uhci_hcd and address 3
May 15 20:49:08 heron kernel: [ 2628.706961] usb 2-1: configuration #1 chosen 
from 1 choice
May 15 20:49:08 heron kernel: [ 2628.725028] input: Logitech USB Mouse as 
/devices/pci0000:00/0000:00:1a.1/usb2/2-1/2-1:1.0/input/input7
May 15 20:49:08 heron kernel: [ 2628.785569] input,hidraw0: USB HID v1.10 Mouse 
[Logitech USB Mouse] on usb-0000:00:1a.1-1
May 15 20:55:56 heron kernel: [ 3036.521260] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 20:56:31 heron kernel: [ 3070.725849] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 20:57:25 heron kernel: [ 3124.876792] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 20:57:45 heron kernel: [ 3145.234291] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:01:03 heron kernel: [ 3342.411627] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:01:48 heron kernel: [ 3387.133258] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:02:08 heron kernel: [ 3407.103576] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:03:39 heron kernel: [ 3498.057674] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:06:10 heron kernel: [ 3648.539500] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:06:18 heron kernel: [ 3657.025783] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3
May 15 21:07:11 heron kernel: [ 3709.851493] usb 2-1: reset low speed USB 
device using uhci_hcd and address 3

-- 
Keyboard keys get stuck and repeat (Feisty, Gutsy)
https://bugs.launchpad.net/bugs/124406
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