I have an old laptop HP Compaq nx 7400 which used to run Lubuntu 15.10. Wired and WiFi worked fine. Then I changed to Xubuntu 15.10, which actually feels quicker on my laptop than Lubuntu. But the problem is, I can't connect to internet anymore, neither wired nor WiFi. Wired worked during LiveCD mode, where you can try Xubuntu without installing and also during installation it had a connection. But after the installation was done and after rebooting, it couldn't connect anymore. I even tried reinstalling, but it was the same.
What should I do? I really like Xubuntu and I hope we can figure this out and I don't have go back to Lubuntu.
Thanks in advance.