I own a Dell Optiplex 760 from 2009 and I have the exact same problem on Debian Jessie (running kernel 3.16.0-4-amd64).
I have been running BIOS version A04 (from 2009) and just upgraded to the latest A16 BIOS version. I can keep you informed if this fixes the ugly bug. FYI, I did the following to upgrade the BIOS, took me around 5mins: - copied an USB FreeDOS 1.1 image onto an empty USB drive. I used this one (don't forget to bunzip2): http://derek.chezmarcotte.ca/wp-content/uploads/2012/01/FreeDOS-1.1-USB-Boot.img.bz2 - copied the latest O760-A15.exe BIOS update file for my Dell 760 onto the thumbdrive - booted into FreeDOS and ran the bios update -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1402331 Title: System will periodically lockup with [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402331/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
