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andrit
Blue Screen Again
Posts: 14
Registered: ‎06-08-2015
Location: GB
Views: 710
Message 1 of 15

x240's fan does not stop after BIOS upgrade to v2.30

After BIOS upgrade to v2.30 (from v2.24) on my x240 it's fan started to run non-stop on ~3k rpm while the machine is idle. Downgrading to v2.29 BIOS version solved the problem.

 

Just FYI.

david99
Token Ring
Posts: 65
Registered: ‎03-08-2008
Location: Slovakia
Views: 701
Message 2 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

I could also confirm that FAN rpms regulation is different than before. I performed also downgrade to bios v 2.29 and everything is as before. I hope lenovo will fix this in next bios release.

 

David

david99
Token Ring
Posts: 65
Registered: ‎03-08-2008
Location: Slovakia
Views: 657
Message 3 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Anybody installed new bios ver 2.33 and could confirm FAN behavior?

 

Thanks

 

David

andrit
Blue Screen Again
Posts: 14
Registered: ‎06-08-2015
Location: GB
Views: 612
Message 4 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Have the same question. I see in 2.33 they have fixed "an issue where the computer might shutdown in a certain case". I think I've stumbled on it several times. But they also say that if "the UEFI BIOS has been updated to version 2.33 or higher, it is no longer able to roll back to the version before 2.33 for security improvement.<2.33-1.16>". I could try it, but I don't want to get stuck with the fan issue (if it is still there) on the new version without the possibility do roll back.
david99
Token Ring
Posts: 65
Registered: ‎03-08-2008
Location: Slovakia
Views: 610
Message 5 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Hi Andrit,

 

I have applied this BIOS and I could say that FAN behavior is same as in 2.31, I was also afraid of this that I will be not able rollback but it is quite fine for me. But please take in mind that your case could be different as you could have different FAN.. revision of board...etc.

 

David

andrit
Blue Screen Again
Posts: 14
Registered: ‎06-08-2015
Location: GB
Views: 534
Message 6 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Hi David,

 

what did you mean by "FAN behavior is same as in 2.31"? Did you mean that the issue still exist or not?

 

Thank you,

  Andriy

david99
Token Ring
Posts: 65
Registered: ‎03-08-2008
Location: Slovakia
Views: 529
Message 7 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Hi Andrit,

 

Well, for me since begining the issue was not so noticable. I noticed slight increase of RPMs but not so dramatic so for me it behaves exactly the same as when I upgraded to 2.30 when we were able see increase of RPMs. I'm now on 2.33 and RPMs are same as on 2.30.

 

David

andrit
Blue Screen Again
Posts: 14
Registered: ‎06-08-2015
Location: GB
Views: 512
Message 8 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Thank you David.
andrit
Blue Screen Again
Posts: 14
Registered: ‎06-08-2015
Location: GB
Views: 456
Message 9 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

I wonder if it is fixed in the latest 2.35-1.17 version. Any feedback/update on that one?

david99
Token Ring
Posts: 65
Registered: ‎03-08-2008
Location: Slovakia
Views: 439
Message 10 of 15

Re: x240's fan does not stop after BIOS upgrade to v2.30

Hi Andrit,

 

Fan behavior in this BIOS/EC is the same for me as with previous versions.

 

David

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