My problem is that my laptop, Dell Inspiron N5110, running ubuntu 12.04, is overheating, and occasionally shuts down voluntarily. The fan is working non-stop.
I know much has been reported/asked/answered about problems similar to mine, but I've been reading and experimenting with solutions suggested for days now, and none of them helped.
My current diagnostic is that:
- when not using
nvidia-current, the laptop overheats and shuts down very often.
- when using
nvidia-current, I think the overheating problem gets better, but unity falls back to unity-2d (
Xlib: extension "GLX" missing on display ":0.0". Error: GLX is not available on the system), which I dislike.
All the answers I found about the opengl/unity problem involve getting rid of the nvidia drivers.
- The fan is working non-stop. AFAICT, this isn't a fan-hardware problem.
- As suggested in many places, I'm using
/etc/default/grub. It doesn't seem to make a difference.
- The only way I found to prevent my laptop from shutting down too often, is by using
Jupiter, and setting its mode to
Performance -> Power Saving. Obviously, this sucks. It stills shuts down occasionally, tough.
- I'm currently using ubuntu 12.04 and kernel 3.2.0-40-generic. I had the same problems with ubuntu 11.10 / kernel 3.0.
Additional command output
% lspci| grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 540M] (rev a1)