Also getting something similar - If I leave the PC running for a couple of hours idle, I lose all connectivity through the ACX111 card. A reboot gets things back to normal. I've attached a section of my kern.log with all the errors, including the one above (the whole log file grew to 1.3GB!). The card runs without trouble in Windows and has done for over a year, perhaps an ACX111 Linux driver issue?
** Attachment added: "kern.log extract with messages relating to the failing of the ACX111 card/driver" http://librarian.launchpad.net/5018216/kern.log.extract.txt.tar.gz -- [acx] failed to free tx buffers - maybe card too hot https://launchpad.net/bugs/69717 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
