I'm having trouble to install Qubes 4.0.3 on my Dell. Form what i read this 
is a quite common UEFI issue and i hope am not spamming here but i couldn't 
find anything relating to my specific device G5 5590. Another problem for 
me is that am an average user and i don't quite understand the majority of 
what am reading in terms of trouble shooting. 


To give a bit of context,  here is where i stand. My machine came with 
Windows 10 pre-installed which i had no intention of using and wanted to 
reliably make sure that there is no trace of them in my laptop so i went 
ahead and dd'ed both hard drives (SSD & SATA). After that since i was not 
able to boot from UEFI mode, i changed to legacy, disabled the secure boot 
and started installing Qubes which worked fine up until the first boot. I 
also changed the SATA settings from REID on to ACHI. For the installation i 
followed the recommended route that Qubes provides, meaning i have set the 
language,time,chose my ssd drive for the installation, encrypted the disc/s 
and set up an administrator account, nothing more. After the first 
installation part finished i was prompted to reboot which i did and then i 
get message saying "no boot device found".

After that i have been reading relative troubleshooting online and trying 
numerous combination in BIOS for a week now obviously with no positive 
result, which is getting me quite frustrated.

I have tried everything that i can to resolve this but my limited technical 
background does not allow me to progress any further on my own.

Would someone be able to provide some guidance in the following topics:

1)How do i make the SSD appear in any of the UEFI or Legacy menus so i can 
then assign to boot from there?
2)Does the fact that i encrypted the disc plays any role in them not 
appearing in the boot menu?
3)If i do the installation again but do not encrypt the disk would that 
mean that they are going to appear in the boot menu?
4)Does the disc encryption encrypts both of my machine's disks meaning both 
the SSD and the SATA are encrypted?
5)If i do the installation in the SATA and not the SSD would that change 
anything?
6)I am assuming that at this stage i need to perform the following trouble 
shooting from the documentation to make the boot work:


   1. 
   
   Copy the /boot/efi/EFI/qubes/ directory to /boot/efi/EFI/BOOT/ (the 
   contents of /boot/efi/EFI/BOOT should be identical to /boot/efi/EFI/qubes 
besides 
   what is described in steps 2 and 3):
   
   cp -r /boot/efi/EFI/qubes/. /boot/efi/EFI/BOOT
   
   2. 
   
   Rename /boot/efi/EFI/BOOT/xen.cfg to /boot/efi/EFI/BOOT/BOOTX64.cfg:
   
   mv /boot/efi/EFI/BOOT/xen.cfg /boot/efi/EFI/BOOT/BOOTX64.cfg
   
   3. 
   
   Copy /boot/efi/EFI/qubes/xen-*.efi to /boot/efi/EFI/qubes/xen.efi and 
   /boot/efi/EFI/BOOT/BOOTX64.efi. For example, with Xen 4.8.3 (you may 
   need to confirm file overwrite):
   
   cp /boot/efi/EFI/qubes/xen-4.8.3.efi /boot/efi/EFI/qubes/xen.efi
   cp /boot/efi/EFI/qubes/xen-4.8.3.efi /boot/efi/EFI/BOOT/BOOTX64.efi
   
   
Does the above mean that  i type in the commands: 1) cp -r 
/boot/efi/EFI/qubes/. /boot/efi/EFI/BOOT *and then hit enter(execute)*. 
                                          2)mv /boot/efi/EFI/BOOT/xen.cfg 
/boot/efi/EFI/BOOT/BOOTX64.cfg *hit enter*
*                                          3)*cp 
/boot/efi/EFI/qubes/xen-4.8.3.efi /boot/efi/EFI/qubes/xen.efi then type 
                                            cp 
/boot/efi/EFI/qubes/xen-4.8.3.efi /boot/efi/EFI/BOOT/BOOTX64.efi *and then 
hit enter*

in any linux terminal and that's gonna do it ? i don't have to change 
anything? For example how do i found out if Qubes 4.0.3 has xen-4.8.3 
version and not xen-4.9.3 or xen-5.9.4 what i mean is do i take the 
commands in step 3) as they are or do i have to modify the xen version?

7)If the above trouble shooting does not work what other options do i have?


Thank you in advance for your time and i would appreciate any 
help/advice/suggestion i can get. 
Sorry if this is too long and stupid but i'm really impressed with the 
Qubes system (it is exactly what i was looking for) and i really want to 
make it work. Even if i am too "basic" to be using a system like this.

If more information is needed please let me know.

System Specifications: i7 9750H, 16GB RAM, 256GB SSD, 1TB SATA, RTX 2060 6GB

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