Some times ago I got rid of that issue. I has something to do with the wireless driver. I think you have to install linux-backport-module to solve it. Try that
-- Jaunty 'randomly' freezes with flashing/blinking Caps Lock on Acer Aspire 6920G https://bugs.launchpad.net/bugs/384147 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
