I finally managed to install the sk98lin driver. After rmmod sky2 rmmod sk98lin and modprobe sk98lin everything is fine.
I'm not sure my folks could have done it without my help though. I hope it will get fix in the next stock kernel of K/Ubuntu. Thanks. -- sky2 driver freezing system after ifdown and ifup https://launchpad.net/bugs/38865 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
