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I had earlier been running on Ubuntu 13.04 with the AMD Radeon HD 7670M graphics driver with the driver installed as given in What is the correct way to install proprietary ATI Catalyst Video Drivers (fglrx) directly from AMD?.

Recently i installed Ubuntu 14.04. The AMD support website "http://support.amd.com/en-us/download/desktop?os=Linux%20x86_64#amd-catalyst-packages" shows 2 drivers - their beta driver and the catalyst 14.4 and both show my Radeon HD 7600M series as being supported in the release notes. But when i tried installing either , i am getting an error that my graphics card is not supported.

I even tried the driver i was earlier running on in ubuntu 13.04, but that too is now giving the same error.

Finally i installed a proprietary driver found under Additional Hardware and selected the Intel graphics card under switchable graphics in the catalyst centre. My current laptop temperature is around 61 C and even slightest computations are taking the temp to as high as 72 C .

I donot care about performance - all i care is somehow to reduce my laptop temperature - anyhow - even i tried switching the AMD card off using vgaswitcheroo , but i found that since kernel 3.12 there is dynamic power management and no way to switch the card completely off.

The output of my

lspci | grep VGA

is as follows now

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7500M/7600M Series] (rev ff)

I donot want to switch back to 13.04 as 14.04 is much better. Also in windows [yes , my laptop is dual booted with windows 8] , the core temp is around 54 .

Please suggest if there is a workaround to somehow control the heating.

Update: I recently got my laptop cleaned by a professional. By cleaning , i mean he took out the fan and manually cleaned it by opening it .. and to my utter surprise the whole fan was almost blocked with dust .. after the cleaning , now the temperature of my laptop is very stable and around 50 C .. i guess the overheating due to radeon drivers was not the root cause ...

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Does it overheat if you remove fglrx* and use the open source drivers? Have you tried radeon.runpm=0 as described at How can I disable ATI discrete graphic GPU at startup in Ubuntu 14.04 without BIOS? –  bain May 28 at 14:09
    
If you still see this problem with the open source drivers, report it upstream at wiki.x.org/wiki/radeon –  bain May 28 at 14:30
    
Note that the AMD Release notes do not speficy that the drivers support 14.04 - they do show support for 12.x and 13.x –  Charles Green May 28 at 15:52
    
@Charles Green the latest amd catalyst 14.6 beta driver for linux supports ubuntu 14.04 and also supports AMD Radeon HD 7600M series .. as given in support.amd.com/en-us/kb-articles/Pages/… . –  killx May 28 at 17:24
    
I'll give them a shot - I am somewhat leary of putting the beta drivers onto my sifes computer: I get enough grief as it is! Currently she's using the open source drivers which work OK - except for the heat issues, and some minor issues with the mouse filckering. –  Charles Green May 28 at 19:11

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