From 4b9d98ea5d360bd7a0ca26545127a625295ddc78 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Kope=C4=87?= Date: Thu, 30 Oct 2025 13:13:02 +0100 Subject: [PATCH] docs/novacustom.md: document v0.9.0 downgrade bug MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Michał Kopeć --- docs/novacustom.md | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/docs/novacustom.md b/docs/novacustom.md index c90d7df30c..bf9827f4b5 100644 --- a/docs/novacustom.md +++ b/docs/novacustom.md @@ -19,6 +19,15 @@ former method was testing our laptops over SSH with the help of [DCU](https://github.com/Dasharo/dcu). You can find the instructions for both approaches below. +## Warning: Downgrading firmware + +Downgrading to v0.9.0 may trigger a bug, where the EC firmware update feature in +coreboot may cause an EC brick. + +To work around this issue, you **must downgrade the BIOS and the EC at the same +time**. First, downgrade the BIOS, then, without rebooting in between, downgrade +the EC firmware. + ## FTDI converter The obvious prerequisite is that you have an FTDI FT232-based USB-TTL