Hi. I've become a permanent Linux newbie because I've never been able to get a modem to work for me on Linux. As my machine is dual-boot, I inevitably switch back to Windows, where the modem does work. A year or two ago, I got a Motorola Surfboard SB5100i (256k) cable modem installed by Blueyonder. Wonderful in Windows (after a 56k), known to work with Linux but no joy for me.
I've tried several installations - Suse 9.1/9.2/10.0, and live distros including the latest Knoppix, and got no joy. Except for Suse 9.3 live distro, which went straight out to the web, no trouble! Hope at last, I thought. But when I downloaded Suse 10.0 (through Windows!) it all went flat - no link.
When I dug down into the settings (and I'm a lost sheep when it comes to any form of comms) I found eth0 device: realtek: Semiconductors Ltd. RTL-8139/8139c/8139c+ (rev10), which might as well be Greek to me. Guessing that the modem might not be properly installed, I tried to install it and was told that "DHCP client is already running on eth0". So I went back to the live distro (i.e. the one working Linux partnership) and this identified what I take to be 2 network cards: AOpen (the mother board name) plus the 8139 string above, and "Motorola ING USB Cable Modem".
I suspect that the live distro may be working because it's not setting up eth0 for local networking (which I don't do anyway), but other distros do set it up. But I'm totally lost on this, and frustrated at not being able to move on with Linux. Any ideas anyone? Please!