This article is from the MachTen & CodeBuilder FAQ, by Jaime Julca firstname.lastname@example.org with numerous contributions by others.
No, but you could bump up the monitor resolution (if your monitor and
computer support higher resolutions).
G10.m. X won't start on my system. It just goes to a white screen then drops
me back into the finder (or hangs the system) How do I fix this?
The two most likely possibilities are not enough memory or lack of
networking. If you are running only the MacOS and MachTen, set memory for at
least 32 MB. X will also fail to start if MachTen is configured to use
OpenTransport networking and there is no network active (e.g. PPP not
connected). Simply quit MachTen and open the folder /System
Folder/Extensions/Tenon Kernel Libraries. Inside this folder resides
OTSocketLib--move this to the folder /System Folder/Extensions/Tenon Kernel
Libraries/Disabled. Now in the folder /System Folder/Extensions/Tenon Kernel
Libraries/Disabled is a file called SocketLib--move this file to the folder
/System Folder/Extensions/Tenon Kernel Libraries, reboot your computer and
try X again.