I have obviously disabled secure boot in the BIOS.
Booting from USB stick stops at the initrd stage. I modified
slightly the Anaconda partition, by changing the file EFI/BOOT/Boot64.cfg according to an older suggestion here, changing the default qubes-verbose entry for efi to
efi=no-rs
but that did not do the trick for me, the installation still halts at the initrd stage. Is there anything else I should/could do/try? The very same stick boots perfectly on an old Toshiba.
Yes, thank you, it did take both things for me to work, i.e., both efi=no-rs and the two options suggested in the link you posted.
Now the only thing which does not seem to work is the touchpad, but apart from this it is installing just fine.
Thanks a lot!!!