squake/quake2 fails to start and says "svgalib: cannot get I/O
permissions"
The Quake executables must run as root when using the SVGAlib renderer, so you must either run them as
root or make them setuid root. See the installation instructions in this document for details.
Sometimes after playing one of the Quake games in X, key repeat
doesn't work any more.
For some reason, the X11 versions of Quake disable key repeat while they're running. If the program exits
abnormally for some reason, key repeat never get turned back on. Do
xset r on
to reenable it.
Quake/Quake II says "/dev/dsp : device not configured"
Your sound hardware is not properly configured. You may simply need to do a insmod sound, or it may
be necessary to rebuild your kernel. RedHat users may need to invoke the sndconfig(8) utility. See the
documentation for your Linux distribution and/or the Linux Sound HOWTO for information on configuring
your system's sound hardware.
GL Quake/Quake II run slower in Linux than in Windows. ++
The Windows 3Dfx GL miniport is heavily optimized for the things Quake II does. Mesa on the other hand,
is more general and less optimized As a result, Linux Quake II runs slower than under Windows. This isn't a
limitation of Linux, but a limitation of the current drivers.
With the most recent releases of QuakeWorld and Quake II, the 3Dfx miniport mentioned above is available
for Linux.