I had R4.2.4. It worked well. I decided to do fresh install of R4.3 and stuck in black screen after booting. Boot logs finished with “Starting session1 for user root” or smth like that. I was able to boot without gui using “systemd.unit=multi-user.target plymouth.enable=0 nomodeset” in grub. I have nvidia gpu (unfortunatelly) and ryzen cpu. Is it known issue? Maybe I can just wait for R4.3.1 with fix:)?
Hi nogui – and welcome to the forum! 
It’s unclear to me, if the black screen is
- the initial boot from the USB-stick
- The first boot from the internal (HDD/SSD/NVMe) drive(s)
:-/
Can you try adding module_blacklist=amdgpu as an option to the kernel - and report back?
Hi, @ChrisA . Thank you for reply.
2. First boot from internal ssd
When I started my laptop to check your answer, I was too slow to edit grub and it turned out, that issue is gone . But it was completly empty qubes os, because I skipped initial setup, because I logged-in from tty in my first successfull boot. It would be headache to configure everything myselft, so I reinstalled qubes os and tried again. Again, just to be clear, after I was able to get to dom0 without gui, issue disappered and next boot was completed with gui, while I didn’t change anything in grub.
Next, i tried to black list amd gpu on fresh installation as you said, but now there is no logs in tty1 (just blinking console cursor) and login promt in tty2
I ended up with the following workaround:
1 Get to tty login (you even can skip actual login, but have to reach log-in screen in console) via systemd.unit=multi-user.target plymouth.enable=0 nomodeset, module_blacklist=amdgpu or any other way
2. Reboot. You will see GUI and empty qubes-os
3. Run /usr/libexec/initial-setup/initial-setup-graphical to complete initial set up
After all of these steps, I got working OS. Hope this will help someone. And I really hope this bug will be fixed in R4.3.1 soon