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for a few days, I googled everywhere to see if someone ever had the same issues as I do. here is my linux kernel on my Lenovo Z50-70 ( maybe it's important)

 $ uname -a
Linux Z50-Debian 4.7.0-1-amd64 #1 SMP Debian 4.7.8-1 (2016-10-19) x86_64 GNU/Linux

 $ lvdisplay  |grep -i path
  LV Path                /dev/Debian/Home
  LV Path                /dev/Debian/Root
  LV Path                /dev/Debian/Swap

# gdisk /dev/sda -l |grep 0
GPT fdisk (gdisk) version 1.0.1
Disk identifier (GUID): 4A75B640-D8A2-03A2-906D-9D9228B6E800
Partitions will be aligned on 2048-sector boundaries
Total free space is 3707 sectors (1.8 MiB)
   1            2048         3653631   1.7 GiB     2700  Basic data partition
   2         3653632         4601855   463.0 MiB   EF00  EFI system partition
   3         4601856         6752255   1.0 GiB     EF00  Basic data partition
   4         6752256         7014399   128.0 MiB   0C01  Microsoft reserved ...
   5         7014400       907063665   429.2 GiB   0700  Basic data partition
   6       907065344       908787711   841.0 MiB   2700  
   7       908787712       910155775   668.0 MiB   EF00  
   8       910155776       953745407   20.8 GiB    8E00  Linux
   9       953745408       976773119   11.0 GiB    2700  Basic data partition

I've followed two guides to use efi-stub (the kernel UEFI self-bootlaoder)

official debian wiki on efistub and bitbinary guide on debian and efistub

but none of them worked.

issue 1: My firmware doesn't find the EFI/Debian/vmlinuz.efi ( but it did find rEFInd efi app, as well as grub when I first installed Debian)

issue 2: when starting the vmlinuz.efi through rEFInd, It stop the boot process with a initramfs prompt and errors telling me it couldn't mount/find root.

also

cat /proc/cmdline 

does not echo my /proc/cmdline, but a generic one without any specified option for root mounting

issue 3: as on the guide i've used efibootmgr, but as each reboot my new entry is deleted.

I'm fairly new to the (U)EFI world, but I really wish I could make this work. As I'm pretty much out of ideas for now, if you know anything that could help me, please shout it out !

Thank you.

  • Why do you do that in the first place, did the conventional installer procedure fail? You seem to go in the direction that's hard to be done "distribution way" (I've implemented UEFI support in ALT Linux), but if you insist on that, Rod Smith's rodsbooks.com/efi-bootloaders is a gem to study first. – Michael Shigorin Oct 29 '16 at 14:31
  • I'm just trying to learn how to use the kernel UEFI capabilities (I really wanna master UEFI), debian uses grubx64.efi by default , and I find adding another layer of software just to change the OS (when I can do it with my UEFI firmware) is kind of useless, and will slow down a PC that isn't really fast in the first place. I already saw Rod's guie, but I hoped that there was another way than rebuilding my kernel ( especially since I will mostly have to do this often, just to have an up-to-date kernel – MacCrow Oct 31 '16 at 12:04
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I think, you can do so that find debian installiation disk and plug to PC. Then boot from disk and pass troubleshooting menu and recovery vmlinuz files and other boot files.

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