I have dual boot system with Windows 10 and Arch linux (with grub) installed on Thinkpad X1 Carbon gen5. I've updated BIOS from version 1.22 to 1.34.
Before Update I had several options in Boot Menu including
Windows Boot Manager and
grub. Now I don't have these options and only SSD name (selecting this force laptop to boot Win 10) and Network Boot options.
I've tried all the options:
- Security -> Secure boot -> [Disabled]
- Startup -> UEFI/legacy -> [UEFI only]
- Startup -> UEFI/legacy -> CMS -> [Disabled] (also tried with enabled)
- OS Optimized Defaults -> [Disabled]
There isn't any change in Boot menu.
What should I do to force BIOS to list all the options including grub?
UPD. I've downgraded to 1.23 (downgrade to 1.22 is impossible) and there is same lack of options in boot menu.