It seems the problem did not really disapeared for me. The CTS protection somehow got disabled on my AP. After a power failure, my AP rebooted with CTS protection enabled, and the freezes came back.
My above patch still fix the issue for me. I've just uploaded a patched lum package in my ppa (http://ppa.launchpad.net/cschieli/ubuntu) -- [Gutsy] System freeze when bringing up rt2500pci interface https://bugs.launchpad.net/bugs/129183 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
