AFAIS it is a kernel driver problem. The NIC is detected as 06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
The problem was not present with 2.6.35-32-server (r8169 was used) and appeared on the system (natty) upon switch to 2.6.38-13-server (r8169 again). Apparently, adding /etc/modprobe.d/blacklist-r8169.conf with blacklist r8169 is a possible workaround, now r8168 is in use. After trying to switch the driver forth and back with modprobe the NIC got stuck and could not detect the connection any more. Reboot did not help, so I had to power off the server completely (pull the cable) to reset. BTW, the current driver from Realtek (v. 8.028.00) has a buggy src/Makefile. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864750 Title: Realtek R8111E not working in Oneiric To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/864750/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs