On a new work laptop (HP EliteBook Ultra G1i AI) I tried to install with the ext4 partitions encrypted and with an LVM flag. On reboot, it reported I was using an invalid password. I tried again without the LVM with the same results. I tried again with MBR instead with the same results. It's now set up with GPT, encrypted, single ext4 partition. Same result. Without encryption, it builds fine.
Using chroot helper from Live USB shows me I can get into the disk with the encryption password and see that things are in place, though I don't know what to do when I get there to make a difference.
I'm not sure if this is hardware-specific: a month ago I was given a test version of the laptop and set things up fine (without LVM), so I can't say there's anything wrong with the iso. I did try using the latest test iso as well, but that couldn't find the network so I abandoned that route.
Does anyone have any ideas where I might be going wrong?
I just did the install without encrypting and it worked fine. Then I did an apt full-upgrade. Also great. After rebooting, it couldn't find any Wi-Fi. dmesg showed quite a few BIOS-related errors, starting with
[ 0.193536] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.I2C1.TPL0], AE_NOT_FOUND (20240827/dswload2-162)
[ 0.193540] ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20240827/psobject-220)
[ 0.215361] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PC00.LPCB.EC0.BIND._STA.IUBE], AE_NOT_FOUND (20240827/psargs-332)
[ 0.215364] ACPI Error: Aborting method \_SB.PC00.LPCB.EC0.BIND._STA due to previous error (AE_NOT_FOUND) (20240827/psparse-529)
Someone else at work who had been gifted one of these new machines was able to do a Debian install onto encrypted disks, but lost network connectivity when they did an update.
Now I've got to see if there's a new BIOS.
Tried again with another machine from the same batch. I can't decrypt on reboot. Without encryption I am now able to install and upgrade it and keep the Wi-Fi.
Two other people at work installing different Debians have also had issues, losing the network and the touchpad, not being able to get the encryption open again. One of them had success with the latest Ubuntu (25.04), not with LTS Ubuntu (no touchpad).
This should have gone into the hardware forum. Sorry.