If something wrong during upgrade debian 12 to debian 13, so the installation did not finish, here is my share how to solved it.
In my case, screen got locked, so I need to manual power off and restart the Laptop.
Normal boot to linux won't work, if possible during selecting menu in grub, select "Advanced Option" and select "Recovery Mode". If you can not go into grub menu, you need to use Debian rescue CD/USB, I use minimal (net install CD),
If you use CD/USB, you will rescue your Debian using chroot.
To repair grub using CD/USB, you need to enter your drive.
To repair broken upgrade using CD/USB, you need to select your Debian partition and mounting /boot partition.
If you using CD/USB rescue, when repair has completed, type exit from chroot
Command to repair broken upgrade process:
# dpkg --configure -a
....
# apt --fix-broken install
....
# apt full-upgrade
...-
# grub-update
...
# grub-install /dev/sda
....
To manage boot efi using efibootmgr
# apt install efibootmgr
# efibootmgr
BootCurrent: 0002
Timeout: 5 seconds
BootOrder: 0001,3001,0002,2001,2002,2003
Boot0001* Windows Boot Manager HD(2,GPT,41ed4da9-8f99-445d-b3dc-d37f4ad717da,0x109000,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000061000100000010000000040000007fff0400
Boot0002* debian HD(2,GPT,41ed4da9-8f99-445d-b3dc-d37f4ad717da,0x109000,0x32000)/File(\EFI\debian\shimx64.efi)
Boot2001* USB Drive (UEFI) RC
Boot2002* Internal CD/DVD ROM Drive (UEFI) RC
Boot3000* Internal Hard Disk or Solid State Disk RC
Boot3001* Internal Hard Disk or Solid State Disk RC
Boot3002* Internal Hard Disk or Solid State Disk RC
# efibootmgr --bootorder Boot0002,Boot0001
Laptop HP Model 15-af109AX, with Bios handled Boot Manager. This model may be not supported in Debian 13 (in Debian 12 there was not problem), I can not change boot order using BIOS nor efibootmgr.
If you can not switch sequence of boot loader using BIOS nor efibootmgr, you need to press F9 button to select boot loader you want to start for HP Model 15-af109AX.
