Thanks for doing all that.
If there are no crash files then I wonder is everything actually running despite not being visible?
1. From ssh, please run: ps auxw | grep gdm > gdms.txt and send us the output.
2. Please also send the output of: dpkg -l > dpkgl.txt
3. How many monitors (and what resolution) are connected?
4. Now you've replaced the nvidia driver please again run: journalctl -b > newjournal.txt and send the result.
Thanks for doing all that.
If there are no crash files then I wonder is everything actually running despite not being visible?
1. From ssh, please run:
ps auxw | grep gdm > gdms.txt
and send us the output.
2. Please also send the output of:
dpkg -l > dpkgl.txt
3. How many monitors (and what resolution) are connected?
4. Now you've replaced the nvidia driver please again run:
journalctl -b > newjournal.txt
and send the result.