Quake

If the renderer in question is ref_gl.so, did you install the glide libraries? •
When I update the brightness while using the GL renderer, and hit
"apply," nothing happens!
Type vid_restart in the console to make the changes take affect.
Note about the 3.17 distribution
As of this writing, the most recent Quake II version is 3.20. If for some reason, you're running version 3.17
instead, the following information may be helpful to you.
Two text files (quake2.conf and fixperms.sh) in the 3.17 distribution were inadvertently saved in
MS−DOS CR/LF text−file format instead of the unix LF format. This means there's an extra carriage return
character at the end of each line in these files and they're not going to behave right until you fix them.
We'll run them through tr(1) to strip out the CR's.
for i in fixperms.sh quake2.conf
do
mv $i $i.bak
tr −d '\r' < $i.bak > $i
done
When I run Quake II with +set vid_ref glx fullscreen from X, I can't
use my mouse or keyboard.