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 Post subject: X220 BIOS downgrade
PostPosted: Wed Jun 13, 2012 8:54 am 
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Joined: Wed Apr 22, 2009 4:03 pm
Posts: 34
Location: Cary, NC
Hello,

I have about 1 year old x220 with BIOS from that time. All was working fine, boot time and shut down time were awesome. I did not make note of BIOS version it was running.

Last evening, I checked into System Update and noticed a BIOS update to v1.28 released on 02/14/2012 and installed it. Now I see a much longer boot time and shut down time. Has anyone noticed something similar?

Question:
1. Is there a way to downgrade my BIOS to the previous version?
2. I used the BIOS update utility and it said something like "it will backup the ols BIOS". Where can I find that on my TP?
3. What is the method used to downgrade and is it proven safe (as best as possible when upgrading BIOS)?

TIA for your input. I really am not enjoying these longer boot and shut down cycle.


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 Post subject: Re: X220 BIOS downgrade
PostPosted: Mon Jun 18, 2012 11:49 am 
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Joined: Sun Apr 25, 2004 12:52 pm
Posts: 3394
Location: United States
1.29 is the latest version so you might try upgrading before downgrading.

http://support.lenovo.com/en_US/detail. ... MIGR-77150

older versions are at the bottom if you need them.   i've not had any issues with 1.28 or 1.29 and currently run 1.29.


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