I've had the same problem in both Ubuntu 12.10 and Linux Mint 15. I've tried taking my Acer laptop apart and cleaned and resat the GPU and CPU heatsinks and fan (with fresh heat paste of course).
$ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +64.0°C (crit = +102.0°C) temp2: +43.0°C (crit = +96.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +66.0°C (high = +95.0°C, crit = +105.0°C) Core 2: +63.0°C (high = +95.0°C, crit = +105.0°C)
It's helped a little, my 'temp 2' used to be higher, and it took much longer to cool down if I ran a game, but my CPUs are still running very hot (the above is just with chromium and a terminal open in Cinammon). I've installed the latest proprietary drivers (not the ones you can select in 'drivers,' which broke X). Instead I'm running 331.
$ inxi -Gxx Graphics: Card: NVIDIA GT216M [GeForce GT 320M] bus-ID: 02:00.0 X.Org: 1.13.4 drivers: nvidia (unloaded: fbdev,vesa,nouveau) Resolution: firstname.lastname@example.org GLX Renderer: GeForce GT 320M/PCIe/SSE2 GLX Version: 3.3.0 NVIDIA 331.13 Direct Rendering: Yes
Despite being 'better than before' my computer still crashes not long after starting any kind of graphics intensive task. Even the game 'Thomas is not along' (seems relatively simple visually) is too much. Now it takes about 20 minutes to crash (rather than 5), but I really would like my laptop to stop overheating so easily. =(
I tried installing Bumblebee as I read it's due to some kind of issue that forces the GPU to run but, again, X stopped working. I uninstalled it, and have since spent time trying to find a solution. My googlefu is failing me, so I turn to you for help. Do I need to step back from my nvidia updates to get bumblebee working? Is there a more up to date version I should be using?
Maybe it's not the GPU (I would have thought that's what temp 2 is reading, and it's cool). Maybe something is happening to make my CPU run through the roof?
$ inxi -fxz CPU: Dual core Intel Core i5 CPU M 430 (-HT-MCP-) cache: 3072 KB bmips: 9043.48 Clock Speeds: 1: 1199.00 MHz 2: 1199.00 MHz 3: 1199.00 MHz 4: 1199.00 MHz CPU Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida arat dtherm tpr_shadow vnmi flexpriority ept vpid
EDIT: I just tried the 'Advanced' install here: https://wiki.ubuntu.com/Bumblebee installing bumblebee-nvidia, virtualgl and virtualgl-libs-ia32 and had the same problem (X server stopped working).