User`s guide

136 007-4701-003
5: Troubleshooting
Configuring a System for Full Scene Anti-Aliasing
This section describes how to configure a system for global or per-window full scene
anti-aliasing.
Note: Simultaneously running stereo and full scene anti-aliasing can require more
graphics-card memory than is available, and thus may not work correctly.
1. Create a copy of the XF86Config file to be customized for full scene anti-aliasing:
# cp /etc/X11/XF86Config /etc/X11/XF86Config.AntiAlias
Note: Automatically-generated XF86Config files should contain the customized
multi-sample positions shown in on page 137. If these values are not already
present, adding them will significantly improve the quality of your output.
2. Edit the new XF86Config.AntiAlias file to include the following line at the end
of each “Device” section:
Option "FSAAScale" “X”
where X is 1, 2, 4, or 6 (see the example “Device” section on page 137).
Note: Per-window full scene anti-aliasing is accomplished by setting “FSAAScale”
to 1. The anti-aliasing level may then be set by the appropriate selection of visuals.
Global anti-aliasing is accomplished by setting “FSAAScale” to 2, 4, or 6. In this case,
the setting will apply to all OpenGL windows, regardless of the visual being
displayed.
3. Make a backup copy of the default /etc/X11/gdm/gdm.conf file:
# cp /etc/X11/gdm/gdm.conf /etc/X11/gdm/gdm.conf-old
4. Edit the /etc/X11/gdm/gdm.conf file to use the new XF86Config.AntiAlias
file you created:
Replace the line:
command=/usr/X11R6/bin/X
with:
command=/usr/X11R6/bin/X -xf86config /etc/X11/XF86Config.AntiAlias