Upgrade Debian 9 to 10 woes

Can anyone help a relative new user, I upgraded debian 9 to 10, using the NixCraft instructions, on restarting the computer the GUI xserver or gnone did not come up as usual.
Pressing ctl,alt,7 then ctl,alt,2 brought it up as it should appear.
I carried out the upgrade from VT2

any sugesstions on where to look would be welcomed.

Thanks in advance

Are you using Nvidia or any propitiatory drivers? Any errors in X server log files located in /var/log?

Hi , sorted the problem, the computer is an Intel nuc, running dual displays, it seems that I must have the display on the DP port as the primary, all then runs fine.
Debian 9 seemed ok with them the other way.
Not sure if there is a way to configure but I can live with it this way.
Thanks for your response
Ricado

Glad sorted it out and posting your solution too. FYI, at least in Gnome you can go to the Settings > Display and set default screen. Another option is mess around X server file:


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