I'm marking this as confirmed based on multiple users reporting the same behavior (and based upon the workaround I posted).
** Changed in: linux-source-2.6.15 (Ubuntu) Status: Unconfirmed => Confirmed -- NetVista 6824 becomes unresponsive after some time, OK after reboot https://launchpad.net/bugs/35274 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs