Grub shows the boot menu then freezes. However, selecting the BIOS/EFI F9 boot menu to select Grub loader, succeeds. The behavior seems similar to problems with HP and secure boot enabled, but I’ve disabled secure boot and no luck.
If I do the BIOS boot menu and pick the option to load an efi file, both shimx64.efi and grubx64.efi boot successfully. I used efibootmgr to create a new entry to boot via grubx64.efi instead of shimx64.efi and both freeze, despite both working via either selecting those entries with F9 boot menu. I also tried grub debug logging, but the log disappears when the boot menu is displayed which is right when it freezes.
An important hint, the initial install did reboot successfully once, so this seems to be also linked to the first-time kernel update with the first boot from disk, or possibly some related boot packages. The latest grub tools released today didn’t help.
I wonder if it has to do with video mode setting to display the menu, which may somehow differ when the BIOS displays it’s boot menu first. I’m not a GRUB or EFE expert by any means, and I’ve run out of things to try, but thankfully can keep booting via F9
System is set up dual boot with a small-ish Windows 10 partition.
Computer is new, HP Pavilion Laptop 15-eh0010nr
I think this is something weird about HP’s UEFI.