I assume you are referring by 640 resolution to the virtual terminal console resolution and want to get a higher resolution. I’m using myself a Nvidia GPU and I could achieve a higher resolution in the console only with one method, by switching to the
syscons(4) driver. By default 12.0-RELEASE has the
vt(4) driver loaded (see
Newcons).
If you wish to use syscons, set in
/boot/loader.conf kern.vty=sc , reboot, run in the console
vidcontrol -i mode. This lists the video modes the graphic card supports. Set the video mode you wish, e.g.
vidcontrol MODE_279 . This sets in my case the console resolution to 1024x768x16 , font 8x16. To make the setting permanent, set the
allscreens_flags= parameter in
/etc/rc.conf .
Or keep the vt driver with the current resolution but install a smaller font (how to
here). I prefer this method because I want to have UTF-8 encoding in the virtual console.
