Hi everybody,

[I'm sorry if I make some mistakes while writing in English but it isn't my 
mother tongue. I'll try to explain my problem as easy as I can.]

My QubesOS is installed on an external SSD storage (I know it's not ideal but . 
In order to make my computer recognize Qubes, I have to copy manually the 
xen.cfg and the xen.efi files at every kernel update (as here : 
https://www.qubes-os.org/doc/uefi-troubleshooting/#boot-device-not-recognized-after-installing
 ).

The problem is that at last update I forgot to change the xen.efi file version 
and that now I'm stuck with a kernel panic every time I try to boot on my 
QubesOS.

I tried to rescue my OS with anaconda but I'm encountering two problems :

- whenever I choose my external storage for booting, there is no grub menu and 
Qubes boots automatically. So I cannot access any troubleshooting or rescue 
shell.

- I downloaded an iso image of Qubes in order to rescue my system but it seems 
that anaconda --rescue can't recognize any linux partitions because of this : 
https://github.com/QubesOS/qubes-issues/issues/5609

- I tried by downloading an iso of Fedora 32 (server version) but anaconda 
couldn't recognize my QubesOS partitions.

Would anyone have any suggestions which could allow me to rescue my system, 
please ?

Thank you !

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