I also have a laptop with the Broadcom Corporation BCM4401-B0 100Base-TX (rev 02) chipset. I am using the b44 kernel driver. If I load it without doing anything, the link goes up then down, and this cycles with a delay from one down to the next up. Playing with the option of the kernel module I found out that this problem disappears when setting the speed limit at 10 Mbps.
# ethtool -s eth0 speed 10 autoneg off (replace eth0 by what applies to your situation). I have no problems when I use this option. I realize it is not a perfect solution, since it limits the speed of the network connection, but slower network is better than no network at all. I have been looking for solutions for this issue from time to time on forums but no explanation for this issue have come up yet. I have never seen any notice on the fact that setting the speed limit at 10 Mbps makes the problem disappear. Maybe it can provide a hint to people trying to get rid of this behaviour, if it is confirmed that it helps getting rid of faulty behaviour at 100 Mbps. Hope this helps. PS: my graphic chipset is an Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03), I am not sure graphic chipsets have anything to do with the issue. -- Unreliable network connection with B44 driver https://bugs.launchpad.net/bugs/279102 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
