weird USB problem: need help

[jotacekm]

I need to make a printing server using linux. The printer is a deskjet 3550, usb.
I have installed cups, ESP ghostscript, HPLIP and hpijs (official HP driver stuff). But it isnt working, i have a device_not_found error.

I use a USB mouse, and it works perfectly. If i unplug and plug my mouse again, this is what happens at /var/log/messages:

Mar 8 10:49:09 localhost kernel: usb 2-1: USB disconnect, address 5
Mar 8 10:49:11 localhost kernel: usb 2-1: new low speed USB device using uhci_hcd and address 6
Mar 8 10:49:11 localhost kernel: input: HID 1241:1177 as /class/input/input5
Mar 8 10:49:11 localhost kernel: input: USB HID v1.10 Mouse [HID 1241:1177] on usb-0000:00:1d.1-1

Weird thing is that: I plug and unplug my printer usb cable lots of times, on all usb slots, and there is no message at /var/log/messages. No changes at /proc/bus/usb/devices. I have even recompiled my kernel with built-in USB printer support and UHCI.

Anyone got any clue on why this happens? I dont know what else to do. Thanks.

[Roxoff]

Look I know it's a stupid question, but I gotta ask it. When you plug in the printer, you do turn its power on dont you? It's just that a mouse has no external power supply, but printers do.

[jotacekm]

Look I know it's a stupid question, but I gotta ask it. When you plug in the printer, you do turn its power on dont you? It's just that a mouse has no external power supply, but printers do.

yeah,power is on.