I saw this issue with an Asus p5q-deluxe motherboard, Intel E8400 Core 2 Duo processor, and Ubuntu 14.04.1 (Nov 1, 2014). The computer would freeze on average once per day (usb inputs would no longer work, screen frozen, no way to recover, etc.). After disabling C1E in the BIOS, the issue was resolved. I waited about 14 days to make sure that the change actually fixed the problem. It did.
During the process of troubleshooting, I switched out the video card (this motherboard does not have onboard video). The problem occurred both before and after the swap, so further evidence that the issue is an interaction with the p5q motherboard, 8400 CPU, C1E, and Ubuntu. Not sure if this is worth looking into anymore since the motherboard is relatively old and is probably not still being used too much. But thankfully this thread from 2008-2009 was here. Otherwise I never would have found the workaround. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/260639 Title: Freeze on mobo P5Q and C1E enabled Status in “linux” package in Ubuntu: Fix Released Bug description: My system is E8400, mainboard Asus P5Q. If I leave C1E cpu feature enabled the system freezes every 2 minutes. C1E is enabled by default! With C1E disabled Intrepid Ibex works well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/260639/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
