On Mon, Dec 15, 2014 at 08:02:13AM -0600, Chris wrote:
I'm hoping I can get some advice/help here on this list with the above problem that is causing system lockups. I didn't want to post to the main list as I'm not sure it would be appropriate, I'm not even sure it's appropriate here but I'll give it a try. If someone has a better list to post to please let me know.
I have noticed the lockups periodically since 09/13/2014. I can't remember what kernel version was in use then possibly kernel 3.13.0-35-generic or -36. It has continued periodically through versions -39; -40 and now to -43. The last time this has happened was Dec 13 14:40:57 localhost kernel: [154858.820009] [drm:i915_hangcheck_ elapsed] *ERROR* Hangcheck timer elapsed... render ring idle. At times when it locks up I will have a cursor on a black screen and will have to press the power button to restart other times it will lockup whenever I'm in an application. At that time I can usually CTRL>ALT-F1 log in and run 'sudo reboot' to restart the system.
Kernel version information is:
Linux version 3.13.0-43-generic (buildd@tipua) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 (Ubuntu 3.13.0-43.72-generic 3.13.11.11)
That's a very old distro-specific kernel, try building a kernel.org release (like 3.18) and see if the problem is still there or not. No one in the community can help with old, distro-specific kernels, except for the distro itself. There are lots of Intel graphic driver changes happening in the kernel, I strongly recommend updating if you have an issue with your hardware. I got 2 _hours_ battery life extension in the 3.17 kernel alone due to Intel driver fixes. good luck, greg k-h