I've same problem. To fix it I've add "blacklist wl" in "/etc/modprobe.d/blacklist" file.
Now all work perfectly. I've this hardware : 02:00.0 Network controller: Broadcom Corporation BCM4328 802.11a/b/g/n (rev 03) on MacBook laptop. -- I cannot connect to any server. Conection hangs up at "channel 0: open confirm rwindow 0 rmax 32768" https://bugs.launchpad.net/bugs/237894 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