yep, I have the same screen as poliva. As you said, it's not always clearly visible.... for the first few hours I wasn't even aware of the problem and thought everything was fine.
Printable View
Yes, Unity 3D with Compiz. My temperatures were taken during a little light web browsing, but I never see the temperature rising by more than a couple of degrees during normal usage(Minecraft excepted :evil: ).
Have you tried using the top program to see if you have any runaway processes?
@jonny
I've completely shutdown graphics (sudo lightdm stop), run powertop and i7z and shut down some offenders (like the sound modules) and still I've got high temps. Here is the output from powertop:
What kernel are you running? Here is mine from uname -a:Code:PowerTOP version 1.13 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 3.3%) Turbo Mode 0.9%
polling 1.1ms ( 0.0%) 1.71 Ghz 0.0%
C1 mwait 0.4ms ( 0.6%) 1.60 Ghz 0.0%
C2 mwait 0.6ms ( 0.4%) 1500 Mhz 0.0%
C3 mwait 1.0ms ( 0.1%) 800 Mhz 99.1%
C4 mwait 7.8ms (95.6%)
Wakeups-from-idle per second : 143.9 interval: 15.0s
no ACPI power usage estimate available
Top causes for wakeups:
37.0% (189.3) [Rescheduling interrupts] <kernel IPI>
15.0% ( 76.7) [i915] <interrupt>
8.8% ( 45.2) kworker/0:1
6.0% ( 30.7) [kernel scheduler] Load balancing tick
5.8% ( 29.7) [ehci_hcd:usb2] <interrupt>
5.4% ( 27.6) firefox
3.8% ( 19.2) USB device 2-1.2.4 : USB Receiver (Logitech)
3.4% ( 17.6) kworker/0:0
2.3% ( 12.0) USB device 2-1.1 : Card Reader (Apple)
Linux randall-MacBookAir 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
and my current readings:
When I'm running OSX in the same environment, my core temps are 50C (15C less!).Code:coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +64.0°C (high = +86.0°C, crit = +100.0°C)
Core 0: +65.0°C (high = +86.0°C, crit = +100.0°C)
Core 1: +63.0°C (high = +86.0°C, crit = +100.0°C)
applesmc-isa-0300
Adapter: ISA adapter
Exhaust : 3812 RPM (min = 3806 RPM)
berryman77, I'm on exactly the same kernel. And my laptop's running a little cooler today at 49C - no warmer than in OS X and the fan's at the minimum 2000RPM.
I have added 'i915.i915_enable_rc6=1' to my GRUB startup parameters as suggested 10-20 pages back. Could that be making a difference?
@jonny
That worked! Thank you!
My new readings, a drop of nearly 10C:
Code:coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +56.0°C (high = +86.0°C, crit = +100.0°C)
Core 0: +56.0°C (high = +86.0°C, crit = +100.0°C)
Core 1: +57.0°C (high = +86.0°C, crit = +100.0°C)
applesmc-isa-0300
Adapter: ISA adapter
Exhaust : 1994 RPM (min = 2000 RPM)
@berryman77, that's a huge difference! I'll add something to the wiki when I get a chance.
Yes; we found this to be the only flag of significance. Its been in the post-install script for quite some time.
@jonny
I edited the wiki here: https://help.ubuntu.com/community/Ma...ir4-2#GPUPower
Thanks again.