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W520: warning don't load latest firmware 1.25
Posted: Sat May 28, 2011 11:29 am
by plympton
It disables turbo boost. Reverting to 1.06 restores turbo boost functionality.
Went through most of yesterday wondering why my machine was dog slow never going above 2.2 ghz, and a quick Google search revealed the answer. Oh well, so much for rigorous testing before release....
Re: W520: warning don't load latest firmware 1.25
Posted: Sat May 28, 2011 7:40 pm
by KongMD
There's actually a
five-page thread over on the Lenovo forums about this. Some interesting stuff was found, but the bottom line is that you have to revert to a previous BIOS edition to get TurboBoost. Also, it doesn't work when the laptop is unplugged (by design, unfortunately). Lenovo forum staff have escalated the issue to engineering, and there will probably be a fix some time soon
The BIOS edition I've been using with TurboBoost successfully is version
1.06. The download is at the very bottom of the BIOS utility page.
Re: W520: warning don't load latest firmware 1.25
Posted: Wed Jun 08, 2011 6:06 pm
by pkincy
Actually 1.22 works just fine. You certainly can roll back to 1.06 but don't need to. Just back to 1.22 from 1.25(1.24).
Re: W520: warning don't load latest firmware 1.25
Posted: Wed Jun 08, 2011 6:36 pm
by plympton
I bumped back up to 1.21 today, and will go to 1.22 based on your response. Felt like 1.06 was either running hot or just spinning the fans continuously.