I am experiencing the same issue. I believe this issue started some where around kernel version 2.6.30 when i used to run Gentoo last year. I don't believe it is a hardware issue or bios bug. I have tried several different bios version, video drivers and xserver version. As far as i can tell its a kernel bug as sysreq does not work and cannot log in through ssh.
Hardware is listed bellow. Asus A8V Deluxe running bios 1015.002, 1017, and 1018.002 AMD Athlon 4400+ 4GB OCZ Ram - Tested and no errors found BFG Nvidia 6800OC 128MB -- random complete system freeze in 10.04 https://bugs.launchpad.net/bugs/645741 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