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  • Posts: 11
  • Registered: ‎09-14-2019
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T459/S - Many BIOSes removed from support page.

2020-07-15, 9:34 AM

Hello guys, I'm a happy T495s user that have just returned from a succesfull warranty repair.
The laptop was given to me with the 1.20 bios version, a bit higher that the one i shipped the pc with.
I went to the support page to read the changelog and i noticed that at least 3 versions have been removed, currently the last one available is the 1.16.
I proceded to downgrade my version to the last "safe one" but it's been like this for more than a week at this point, we jumped back to March with no explanation and/or no update.

Do you have any info about that?


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Re:T459/S - Many BIOSes removed from support page.

2020-07-16, 15:15 PM

UEFI v. 17 had a bug, related to the new option to select the size of the memory assigned to the graphics system (UMA Frame Buffer Size). After the update and reboot, Windows did not load, the computer froze in a blank screen, no message or error code. The problem was that the buffer size was selected at 128 MB. The solution was to load the default options, which put the buffer at 2 GB. I changed it to 1 GB. See https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T-series-Laptops/Error-after-bios-upgrade-on-T490/m-p/5015734.


UEFI v. 18 worked, but it restored the buffer size to the default 2 GB, although the Setup showed it as 1 GB in my case. I changed it again to 1 GB (I moved it to 2 GB and then back to 1 GB and saved). No problems since that. I am still at 1.18.

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