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note about prepping t480 usb bios updater 

Signed-off-by: Leah Rowe <info@minifree.org>
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Leah Rowe 2024-12-18 06:16:24 +00:00
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site/docs/install/t480.md
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@ -263,8 +263,22 @@ and it can be downloaded here:\
NOTE: T480s (S model) doesn't have EC UART support yet, so it doesn't matter
yet which version you update to on the S model.**
Prep a USB stick with it:
geteltorito -o t480_bios_update.img /path/to/your/downloaded.iso
Now DD it to the raw USB flash device:
dd if=t480_bios_update.img of=/dev/sdX bs=4M conv=fsync status=progress
You must disable SecureBoot, and enable legacy/CSM boot, and boot it in BIOS
mode, not UEFI mode. Make sure your battery is well-charged, and boot it with
a battery and with the power supply plugged in. Select *option 2* in the menu,
to update your BIOS, which also updates the EC firmware. This is the Lenovo
BIOS/UEFI updater. Once you've updated, you can flash Libreboot.
Please ensure also that you've already dealt with the Thunderbolt issue, which
is described above.
is described above. After all of this, you can flash Libreboot.
Find videos online of how to disassemble this, and/or find Lenovo's own
service manual online. Otherwise, observe: