Hi.
Thanks for the reply.
I tried with a USB 2.0 pendrive in both USB2 and USB3 ports, but it did not boot from any.
I have also tried NanoBoot-5.0.3.1-fat.img
If I select debug mode, after the dots and the "ready", "early console in setup code" appears, and it hangs there.
Firstly, I thought it could be VGA related, so I used vga=ask instead of vga=0x305, but nothing happens. It hangs anyway, even without the prompt which let you list and choose the desired vga mode. (I saw what should appear with the vga=ask by booting it in VirtualBox. There, it works perfectly).
I tried "ubuntu-15.10-desktop-amd64.iso". It boots in UEFI mode perfectly and works correctly. If you want, I can post a dmesg.
What else do you want me to try?
Thanks.