Am Monday 26 January 2009 08:27:53 schrieb Andrew Morton: > > I've got a Lenovo X200 with an Ericsson F3507g Mobile Broadband Module > > (a 3G cellular data card with built-in GPS), which uses the cdc_acm > > driver. I've experienced a couple of problems with it. First, it > > tends to hang the system after I've been using it for a while. This > > occurs whenever it's sending a lot of data to/from the computer, > > whether it's a PPP connection or a GPS data stream. I'm not sure how > > to debug this; the Caps Lock light isn't flashing, so I'm not sure if > > it's a panic or just a hang. Second, if I read one of the TTYs using > > "cat", I get a ton of blank lines. To make any sense of the data > > stream, I have to do cat /dev/ttyACM0 | grep -v "^$". > > > > If anyone could help me debug this, I'd be greatly appreciative. It is probably necessary to setup a watchdog. Can you do that? As for the blank lines, I am not sure this is a bug. Your device may indeed send a lot of newlines. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
