Lose Network after Windows 7

[sfeinst]

I don't know if this is a Windows 7 issue, a PCLOS issue or a hardware issue, but this is what happens.  If I boot into Linux, no problems connecting to internet.  If I boot into Windows 7, no problems connecting to internet.  But if I boot into Linux after having boot into Windows 7, I can not connect to internet.  I have to Configure Network and re-establish my settings.  It doesn't matter if I power off first, I still have to do this.

The only thing I could think of is that possibly Windows 7 sets something on the network card when it connects that causes Linux to not recognize the card from a prior setting and it has to reconfigure to pick up the change.  But that is based on absolutely no information other than what I just wrote.

According to Hardware my ethernet card is a Realtek RTL8111/8168B PCI Express Gigabit Ethernet controller.  I am wired to router, not using wireless.

thanks for any ideas.

[MBantz]

Just a wild guess,

one thing in common could be arp tables in your router/firewall that mismatch between Linux/Windows boots. To test, reset your router after shutting Windows down. If Linux internet works after the reset then the problem is narrowed down,

cheers,
MBantz

[menotu]

What version of PCLOS are you using?

I've found since going to 2010 Beta1 that my NIC doesn't start immediately - I have to wait approx 30 secs and then I get the "Network is up on interface etc etc" and then everything is hunky dory - no connections issues.

Have you tried waiting a minute or two to see if anything happens?

[sfeinst]

Just a wild guess,

one thing in common could be arp tables in your router/firewall that mismatch between Linux/Windows boots. To test, reset your router after shutting Windows down. If Linux internet works after the reset then the problem is narrowed down,

cheers,
MBantz

My router has required restarts lately (don't know if it is related to Win 7, new PC or new PS3).  Usually when I have to restart router, nothing connects.  With the router restarts, I was thinking the router was starting to go, but I haven't had to restart in 2 weeks now.  But to answer your question, restarting router does fix this as well (though it takes longer).  If the arp tables are different (and no I have no idea what an arp table is), wouldn't Win 7 have issues connecting after PCLOS was used?  If they are different, is there anything I can do or am I stuck?

Thanks

[sfeinst]

What version of PCLOS are you using?

I've found since going to 2010 Beta1 that my NIC doesn't start immediately - I have to wait approx 30 secs and then I get the "Network is up on interface etc etc" and then everything is hunky dory - no connections issues.

Have you tried waiting a minute or two to see if anything happens?

Using 2009 with KDE4.  I have waited for up to 5 minutes (and my family longer because I wasn't home from work yet to fix the problem) so I don't think it is a length of time issue.

[MBantz]

Even wilder guess (but narrowed down:-) the mac adress from the card are reported differently from Windows and Linux. The protocol Arp is used to match ip addresses to mac addresses.

You can try a couple of things:
- Update the firmware in the router
- Temporarily change your router (what type is it btw?)
- Temporarily use a fixed IP in both Windows and Linux - and check if the mac address are reported as the same in both os'es.

cheers,
MBantz