Can you put this on the a separate thread and mention that its version and betas status.
apparently your system is running and only the Xserver (startx) is having trouble for some reason.
This thread is better kept to the topic it initially had.
Take a look around the forum using the search option ..... I recall hearing/reading others with similar problems.
To see all the hardware parameters on your machine use:
"inxi -Frnz:"
Some had luck through using an external monitor, where apparently the first display wasn't recognized correctly and it looks your monitor isn't either.
No, that shouldn't be needed as 3.0 Stable is Jessy based and 3.7 is Buster (and Kernel version 5.2). The thread there, might indicate the origin of the issue, though.
