Hello. I’m using Lenovo ThinkPad X390 Yoga (model type: 20NN002NMC). I have been using dual boot of the preinstalled Windows 10 x64 and Linux (formerly Debian based distro. I have tried the latest versions of Debian and Ubuntu). About 6 weeks ago, after updating the BIOS to N2LET76W 1.75 (https://download.lenovo.com/pccbbs/mobiles/n2lur14w.txt) and the Intel Management Engine Firmware (12.0.67.1579), an issue arose. When I boot to Debian 10 Buster/Ubuntu 20.04.1 (kernel 4.19.0-10-amd64 and 5.4.0-42-generic) using the Grub bootloader with active Secure Boot (fully supported), and then I turn the notebook off or restart it in Debian/Ubuntu, it won’t turn back on – it won’t POST, the screen is black, etc. After that time, I need to unplug the notebook from the power adapter, or remove it from the dock, and it will boot on battery. But it won’t boot while plugged in until it boots into Windows and is turned off/restart from it. After booting to Windows, it works fine while plugged in, until it is turned off in Debian/Ubuntu again. I have tried install firmware-linux-nonfree etc... It looks like a BIOS/Firmware error related to power management. I’m using the latest BIOS/Firmware updated via the official Lenovo software – Lenovo Vantage (bios version 1.76). Notebook was sent to Lenovo for repairs, the motherboard was replaced, yet the problem persists – hence thinking it’s BIOS/Firmware related. Lenovo claims it’s Linux’s issue, even though the list it as officially supported (https://support.lenovo.com/sk/en/solutions/pd031426) and there refer me to the community. Lenovo stuff inform me too, that this issue may be related to requirements Windows 10 v2004. Many thanks for your help.
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Interesting. But TBH, I have no idea what can cause this, as the issue happens in early phase, before OS take control, maybe OS should do something in shutdown phase but Linux does not? And, I don't think this is related with power management, my knowledge does not help on this issue. :( Is it possible to remove the windows partition and see if the problem still exists?
(In reply to Matej from comment #0) > Lenovo claims it’s Linux’s issue, even though the list it as officially > supported (https://support.lenovo.com/sk/en/solutions/pd031426) and there > refer me to the community. Lenovo stuff inform me too, that this issue may > be related to requirements Windows 10 v2004. can you share the contact who refers you to the community? We can not do anything with an issue introduced by a BIOS upgrade. Even if it is kernel related, we need to understand the changes between BIOS release to give us a clue what might be the problem.
Bug closed as there is no response from the bug reporter. Please feel free to re-open it if you can reproduce the problem with latest upstream kernel and provide the information as requested.