I'm currently on a fully up2date RHL 8.0 system w/ 2 PII CPUs running the
kernel-smp-2.4.18-19.8.0 kernel.

Sometimes, after periods of inactivity, my USB keyboard will be "hung". The LEDs
will blink, and the keyboard will not respond to any key presses. Unplugging and
replugging the keyboard in resets it and makes it responsive again.

Messages displayed while the keyboard is hung:

Jan 12 12:15:20 verdande kernel: usb-uhci.c: interrupt, status 3, frame# 920
Jan 12 12:15:25 verdande kernel: usb-uhci.c: interrupt, status 3, frame# 1864
Jan 12 12:15:30 verdande kernel: usb-uhci.c: interrupt, status 3, frame# 760
Jan 12 12:15:35 verdande kernel: usb-uhci.c: interrupt, status 3, frame# 1704

every 5 seconds

then unplug and replug:

Jan 12 12:15:39 verdande kernel: usb.c: USB disconnect on device 3
Jan 12 12:15:40 verdande kernel: hub.c: USB new device connect on bus1/2, assign
ed device number 4
Jan 12 12:15:40 verdande kernel: input0: USB HID v1.00 Keyboard [QTRONIX USB Key
board and Mouse] on usb1:4.0
Jan 12 12:15:40 verdande kernel: input1: USB HID v1.00 Mouse [QTRONIX USB Keyboa
rd and Mouse] on usb1:4.1
Jan 12 12:15:44 verdande /etc/hotplug/usb.agent: Setup hid for USB product 5c7/2
011/110
Jan 12 12:15:44 verdande /etc/hotplug/usb.agent: Setup keybdev mousedev for USB 
product 5c7/2011/110


and it works again, at least until it hangs again.

This isn't specific to this 19.8 kernel -- I saw it with older 8.0 kernels as well.

It only seems to occur when the keyboard is idle for a while and only while in X
(but I tend to always be in X on that system, so that may or may not be
required; similarly, I presume its a kernel problem, but it might be an X
problem since I've only seen it there)

usbview describes the keyboard as:

USB Keyboard and Mouse
Manufacturer: QTRONIX
Speed: 1.5Mb/s (low)
USB Version:  1.00
Device Class: 00(>ifc )
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 8
Number of Configurations: 1
Vendor Id: 05c7
Product Id: 2011
Revision Number:  1.10

Config Number: 1
	Number of Interfaces: 2
	Attributes: a0
	MaxPower Needed:  50mA

	Interface Number: 0
		Name: hid
		Alternate Number: 0
		Class: 03(HID  ) 
		Sub Class: 1
		Protocol: 1
		Number of Endpoints: 1

			Endpoint Address: 81
			Direction: in
			Attribute: 3
			Type: Int.
			Max Packet Size: 8
			Interval: 20ms

	Interface Number: 1
		Name: hid
		Alternate Number: 0
		Class: 03(HID  ) 
		Sub Class: 1
		Protocol: 2
		Number of Endpoints: 1

			Endpoint Address: 82
			Direction: in
			Attribute: 3
			Type: Int.
			Max Packet Size: 3
			Interval: 10ms

I'm using the usb-uhci controller module. This system's USB controller is:

00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 01)