I have recently upgraded to a Gigabyte 8KNXP mobo with onboard Intel LAN.
I also use a PCI ADSL modem with conexant chipset.
When I put the new board in I loaded the Gigabyte drivers including the Intel LAN drivers for the ethernet port.
I found the modem would connect to the exchange and I could dial my ISP (Demon). However, I could not access web pages or download mail.
The only fix was to complete a system restore to the point before I loaded the drivers and then disable the onboard LAN in the BIOS to stop XP Pro recognising the hardware at boot.
I have also tried the new Intel drivers on the XP update site. The same issue occurs.
I also installed an external modem with a TI chipset and the same fault occured.
Anyone seen this problem? Any fixes?