I can confirm the bug with kernel 3.5.0-34-generic (on Kubuntu 12.04 LTS). I don't think it is a hardware issue.
I'm not sure if this helps, but high CPU loads prevent the system freezes. I am using the Kubuntu machine to control lab equipment over Ethernet (SCPI, low cpu load, some network, a couple of GB memory) . I had regular freezes every 12 to 36 hours. Inserting some random computation (inverting a 16x16 matrix at least once a second) fixed the problem. Uptime is now 11 days and still counting. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1154006 Title: [dynabook TX/66E] 12.04 freezes many times daily To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1154006/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs