E520 Fan sometimes not working after switchable-graphic- issue-BIOS-Update [ Edited ]

[Cleo_Lenovo Administrator]

Hi Gregi,

James is no longer working with Lenovo. I'll take over his tasks temporarily. Thanks for the pdf you provided. It's really good with pictures to show the settings clearly. I appreciate others to share the same as well.

How hot is hot? That is very subjective.  It'd be good if there is a tool to measure the temperature so i could inform the engineers respectively.  Try HWMonitor and let me know the temperature.

Thanks!!

Regards,

Cleo

[Benik3]

I tested it little.
I switched to Intel GPU, when the fun was stoped.
Then I turned on GPU stress test and the temp in 1-2minute increase to 60°C then it was slower (the GPU stress didn´t drastic).

I didn´t test the maximum temperature...

[bss]

In my case the laptop was idle (no cpu load). Because of the fan not working propery, it got very warm (lets say aprox. 40-45 C) on the outside near A,S,D keys - in an area of a palm. I have also checked the CPU temperature and it was about 80 C which is way too hot for no cpu load. 

I have also started a thread on ubuntu forum (since I'm also running linux): http://ubuntuforums.org/showthread.php?t=1900942

[Benik3]

80°C in idle? it´s strange

[bss]

Well if the fan does not throtle up, it not so strange

I think the problem lies in the temperature monitoring when the discrete graphics is powered down.

[niksbenik]

Greetings,

I  have noticed this problem while gaming with Select the graphics processor based on application needs option in CCC selected. An application was using the 6630M, of course. The latest drivers and BIOS here.

[Gregi]

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Cleo_Lenovo wrote:

Hi Gregi,

James is no longer working with Lenovo. I'll take over his tasks temporarily. Thanks for the pdf you provided. It's really good with pictures to show the settings clearly. I appreciate others to share the same as well.

How hot is hot? That is very subjective.  It'd be good if there is a tool to measure the temperature so i could inform the engineers respectively.  Try HWMonitor and let me know the temperature.

Thanks!!

Regards,

Cleo

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How hot is hot ?

Well, I think it is obvious that the cooling system doesn't work when graphics is manually switched to integrated as I described in the file. The casing under my hands feels hot and after some time it is uncomfortable. On other graphics settings, fan works and it feels, because, casing doesn't get hot.

But I run HWMonitor just to provide some numbers. Just with web browsing and reading temperature is:

Core/Package : reaches 69  C

Hard drive: 48 C

After longer time it will go higher.

If I applied some more load on system it surely would go higher because fan doesn't work at all. There is significat difference between work of cooling system of integrated and discrete graphics or automatic setting (then it's ok, as I described earlier)

[bss]

I got aprox. the same results. Up to 80 C in idle. If I then switch to discrete graphics the cooling system responds and cools it down to 50 C which is normal. And I have these  problems on both windows and linux.

[Benik3]

You have realy high temperature. With integral graphic on max power (AC pluged) I had in idle (browsing web etc) only 45°C on both cores after 2 hours...

With dedicated card I have about 50°C in idle (some times fan only rapidly deflates hot air).

[Gregi]

So you guys have exactly the same situation. Temp can go very high especially on AC, because on battery CPU run up to 50% power by default on "energy saver" or other similar power plans. And like you said, if you switch to discrete, fan starts at once and immidiately cools system down to normal, desired temperatures.