And it’s the AI companies who are going to have to pay it, either directly or via taxes.

Weird. Not sure what could be the cause then, sorry.

I’ve been recommended to do a fully CMOS reset by pulling out battery but don’t really have time. It disappeared after a BIOS update :)

Did you load the default BIOS settings after that? If not, that might be easier than removing the battery.

And if you did, the default settings could have enabled the CSM, or changed other settings like fast boot that might make the drive not show up.

Have you checked your BIOS if CSM is enabled (gets disabled when enabling secure boot iirc)? If your Linux drive has an old partitioning scheme it needs that to show up during boot I think.