Hi
Downloaded and installed the latest drivers from Dell but still no good. Will only connect at 100Mbps.
Have tried the newer Realtek drivers, from Realtek, as well but still no good.
Ran the Dell Diagnostics and it passed. All OK.
As I originally pointed out I ran the Laptop using Ubuntu and it would still only connect at 100Mbps.
This seems to point to an hardware fault.
There are lots of examples of this fault on the Realtek PCIe GBE controller on the internet BUT there doesn't seem to be any answers.
Regards
Nigel