Martin, is this still an issue for you? Try running lsusb with and without the usb cable connected. Also, watch the output of dmesg while connecting and disconnecting the usb cable.
Since your usb ports otherwise work fine, like you mentioned, it might be your UPS that's broken (even if there's no driver for your ups, it should at least be visible as an unsupported device in lsusb) -- UPS USB connection causes power management to freeze system in Hardy https://bugs.launchpad.net/bugs/254309 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
