Antes de mais a placa abordada nesta página é a Huawei connect card 3G e220.

Quando obtiverem um erro do estilo:

Mar  6 15:32:57 pluto kernel: usb 2-1: device descriptor read/64, error -71
Mar  6 15:32:57 pluto kernel: usb 2-1: device descriptor read/64, error -71
Mar  6 15:32:57 pluto kernel: usb 2-1: USB disconnect, address 3
Mar  6 15:32:57 pluto kernel: option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Mar  6 15:32:57 pluto kernel: option 2-1:1.0: device disconnected
Mar  6 15:32:57 pluto kernel: option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
Mar  6 15:32:57 pluto kernel: option 2-1:1.1: device disconnected
Mar  6 15:32:57 pluto kernel: usb 2-1: new full speed USB device using uhci_hcd and address 4
Mar  6 15:32:57 pluto kernel: usb 2-1: device not accepting address 4, error -71
Mar  6 15:32:58 pluto kernel: usb 2-1: new full speed USB device using uhci_hcd and address 5

Então precisam do seguinte ficheiro /usr/share/hal/fdi/preprobe/20thirdparty/10-huawei-e220.fdi com o seguinte conteúdo:

<?xml version="1.0" encoding="UTF-8"?>

<deviceinfo version="0.2">
	<device>
		<match key="usb.vendor_id" int="0x12d1"> <!-- Huawei -->
			<match key="usb.product_id" int="0x1003"> <!-- E220 -->
				<merge key="info.ignore" type="bool">true</merge>
			</match>
		</match>
	</device>
</deviceinfo>

service haldaemon restart

e já deve funcionar.