HP G42 overheating like crazy

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HP G42 overheating like crazy

Postby Stosskraft on Tue Nov 22, 2011 5:50 am

Ok I am in a new situation. I have a HP G42 as my personal computer, and I am running linux mint 11... I do love it but it does get hot to the point of discomfort and I have to use a large fan pointed at the lap top.

Now the crazy part is my new job just gave me vertially the same laptop (Compaq version) with a small harddrive running windows 7. It has been great to compare WIN 7 to mint and I must say that 7 has come a long way from the vista crap. Or course I love my mint set up, but using the laptops I have come to some conclusions:

1. The windows laptop almost never gets hot.. the mint one is really really hot...even touching the mouse pad is alarming.
2. the battery last at least 40% longer with windows..and I tried this with both batteries on both machines.

In all other respects I prefer mint...but using 2 very similar laptops (and hardware) my linux pc is on the verge of frying itself.

It has an ATI Redeao 4200 HDMI video card.

Any suggestions please?
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Re: HP G42 overheating like crazy

Postby xenopeek on Tue Nov 22, 2011 6:32 am

The kernel used with Linux Mint 11 has a power regression in the code, that causes it to not be as conservative with power use as previous kernel versions. This warning is in the release notes. For Linux Mint 11 they are at http://www.linuxmint.com/rel_katya.php, and it also directs you to read the Ubuntu 11.04 release notes (as it is based on that). From https://wiki.ubuntu.com/NattyNarwhal/ReleaseNotes#Linux_kernel you can see to expect 10% to 30% increase in power consumption in laptops (and thus reduced battery life and increased heat).

This is well known and heavily documented and investigated at Phoronix. There is a patch available however, for kernel 3.2, and it will likely be included default in the next kernel. Details: http://www.phoronix.com/scan.php?page=article&item=linux_aspm_solution&num=1. Linux Mint however uses the 2.6.38 kernel versions, so that doesn't help you. Switching to Linux Mint 12 and manually patching your kernel might be an option (you will have to compile your kernel).

Another alternative is to force your CPU to use a lower operating frequency. This will save power (and heat, and battery life) also. Add the CPU Frequency Monitor (or something like that) to the panel (right-click it, select add to panel) and you can set the frequency or power conservation method there. You need to add one for each core on your CPU BTW.
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Re: HP G42 overheating like crazy

Postby ej64 on Wed Nov 23, 2011 9:44 am

Sorry that I disagree with you, Vincent, in this case it's not the power regessions (maybe to a lesser extent) with the newer kernels.

In my experience (had an quite similar Asus with integrated HD3200, AMD CPU and chipset), the latest AMD Catalyst driver (11.11) will solve the heating. It includes drivers for the chipset, the low power states of both cpu and integrated graphics and usually installs like a charm. Give it a go! -> AMD
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Re: HP G42 overheating like crazy

Postby Stosskraft on Tue Nov 29, 2011 5:39 am

ej64 wrote:Sorry that I disagree with you, Vincent, in this case it's not the power regessions (maybe to a lesser extent) with the newer kernels.

In my experience (had an quite similar Asus with integrated HD3200, AMD CPU and chipset), the latest AMD Catalyst driver (11.11) will solve the heating. It includes drivers for the chipset, the low power states of both cpu and integrated graphics and usually installs like a charm. Give it a go! -> AMD


Sorry can you tell me how to do that? I am willing to try anything.
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Re: HP G42 overheating like crazy

Postby ej64 on Tue Nov 29, 2011 6:27 am

Stosskraft wrote:Sorry can you tell me how to do that? I am willing to try anything.

Well, usually I'm helpful ... but at that point I have to say: if you're not able to install the catalyst driver on your own (AMD provides some links with a lot of reading and howtos) then I think it might be too dangerous to tell you some simple commands that engage deeply into the system ...

Sorry, no offence meant. :roll:
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