Hi Vojtech,
USB HID support under 2.5.8-final prints a lot of the following errors:
hid-core.c: control queue full
usb-uhci.c: ENXIO 80000400, flags 0, urb cf89fc40, burb cf89fbc0
The relevant dmesg output...
usb-uhci.c: $Revision: 1.275 $ time 23:28:14 Apr 14 2002
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 9 for device 00:04.2
PCI: Sharing IRQ 9 with 00:04.3
PCI: Sharing IRQ 9 with 00:09.0
PCI: Sharing IRQ 9 with 00:09.1
PCI: Sharing IRQ 9 with 00:0d.0
usb-uhci.c: USB UHCI at I/O 0xd400, IRQ 9
usb-uhci.c: Detected 2 ports
hcd.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found at /
hub.c: 2 ports detected
PCI: Found IRQ 9 for device 00:04.3
PCI: Sharing IRQ 9 with 00:04.2
PCI: Sharing IRQ 9 with 00:09.0
PCI: Sharing IRQ 9 with 00:09.1
PCI: Sharing IRQ 9 with 00:0d.0
usb-uhci.c: USB UHCI at I/O 0xd000, IRQ 9
usb-uhci.c: Detected 2 ports
hcd.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found at /
hub.c: 2 ports detected
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
usb.c: registered new driver hiddev
usb.c: registered new driver hid
hid-core.c: v1.31:USB HID core driver
usb.c: registered new driver usbscanner
hub.c: new USB device on bus 1 path /1, assigned address 2
hub.c: new USB device on bus 1 path /2, assigned address 3
hub.c: USB hub found at /2
hub.c: 5 ports detected
hub.c: new USB device on bus 1 path /2/1, assigned address 4
hid-core.c: control queue full
hid-core.c: control queue full
hid-core.c: control queue full
hid-core.c: control queue full
... <lots more of these>
usb-uhci.c: ENXIO 80000400, flags 0, urb cf89fc40, burb cf89fbc0
usb-uhci.c: ENXIO 80000400, flags 0, urb cf89fc40, burb cf89fbc0
usb-uhci.c: ENXIO 80000400, flags 0, urb cf89fc40, burb cf89fbc0
usb-uhci.c: ENXIO 80000400, flags 0, urb cf89fc40, burb cf89fbc0
... <lots more of these>
hiddev0: USB HID v1.10 Pointer [EIZO EIZO USB HID Monitor] on usb1:2.1
hub.c: new USB device on bus 2 path /2, assigned address 2
hub.c: USB hub found at /2
hub.c: 4 ports detected
-Udo.