Fodquake-sw

Fodquake-0.4 (dev) and newer supports scaling.

Easy to fix it is something like this:

file svga

  xinit ~/quake/startsvga -- :1

For CRT monitor on VGA1 on intel gfx. file startsvga

  xrandr --newmode "640x400_160.00"  60.83  640 680 752 864  400 401 404 440  -HSync +Vsync
  xrandr --addmode VGA1 "640x400_160.00"
  xrandr --output LVDS1 --off
  xrandr -s 640x400_160.00
  xrandr --rate 160 
  xset -dpms
  xset s off
  cd ~/quake/
  xset m 0
  xrandr --output VGA1 --scale 0.5x0.5
  #./fodquake-sw
  xterm

Now start fodquake:

  ./fodquake-sw +vid_fullscreen 0 

go into options -> video modes, press right till clone desktop is chosen, press enter.

Note you might wanna do that before running above scripts.