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t480 update notes (ec uart) 

Signed-off-by: Leah Rowe <info@minifree.org>
master
Leah Rowe 2024-12-17 14:37:36 +00:00
parent 207c641445
commit 63db2df0fe
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site/docs/install/t480.md
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@ -234,6 +234,15 @@ write protections](../linux/grub_hardening.md) on an existing Libreboot setup.
You must also make a dump of the NOR flash, before updating Lenovo's firmware,
and once again before flashing Libreboot, being sure you have good dumps.**
**T480: Make sure to use the `n24ur39w` release, when updating Lenovo firmware.
Or downgrade to this version. This is because the EC UART support in coreboot
specifically taps into the EC code of that release. See:\
<https://download.lenovo.com/pccbbs/mobiles/n24ur39w.html>\
and it can be downloaded here:\
<https://support.lenovo.com/us/en/downloads/ds502355-bios-update-utility-bootable-cd-for-windows-10-64-bit-linux-thinkpad-t480>\
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.**
Please ensure also that you've already dealt with the Thunderbolt issue, which
is described above.