I am facing a weird problem. I am connecting to my dsl modem via ethernet.

After booting, sometimes Ubuntu 10.10 does not detect the eth0 card properly or does not connect to the modem.

I have made the following observations:

1. My modem is fully on. All indicators are on except ethernet, which is blinking continuously.
2. My network indicator applet informs me that I am connected to modem, but I am not able to browse as it has not established connection with modem.
3. I need to power off and on (restart) the modem several times OR disconnect/connect (via network applet) several times, before the system can establish a connection with the modem.
4. Once it establishes the connection, the ethernet LED (on modem) stops blinking and glows continuously.

However, I do not see this problem every time I reboot or start my computer. 3/5 time, it connects to the modem in a single attempt.

Friends, I am not able to understand root cause of this problem. Plus I do not know what kind of logs should be attached. If you want any logs please give me command to run, and I will paste the result for you.

Note: I ran system testing when above problem happened. Follow this link to download result.