<s>
In	O
computing	O
,	O
a	O
GLX	B-Library
visual	I-Library
is	O
a	O
set	O
of	O
attributes	O
that	O
define	O
a	O
mode	O
in	O
which	O
OpenGL	B-Application
programs	O
can	O
write	O
to	O
an	O
X	B-Operating_System
window	I-Operating_System
with	O
GLX	B-Device
.	O
</s>
<s>
A	O
list	O
of	O
GLX	B-Library
visuals	I-Library
can	O
be	O
found	O
with	O
the	O
command	O
"	O
glxinfo	O
"	O
.	O
</s>
<s>
Programs	O
can	O
get	O
a	O
GLX	B-Library
visual	I-Library
matching	O
the	O
desired	O
properties	O
with	O
glXChooseVisual	O
.	O
</s>
<s>
In	O
principle	O
,	O
a	O
GLX	B-Library
visual	I-Library
is	O
an	O
X	B-Operating_System
visual	O
augmented	O
with	O
ancillary	O
buffer	O
information	O
.	O
</s>
<s>
An	O
error	O
message	O
that	O
has	O
puzzled	O
many	O
an	O
X	B-Operating_System
user	O
is	O
"	O
Could	O
n't	O
find	O
matching	O
GLX	B-Library
visual	I-Library
"	O
(	O
or	O
similar	O
)	O
it	O
means	O
that	O
the	O
program	O
tried	O
to	O
use	O
a	O
GLX	B-Library
visual	I-Library
that	O
was	O
not	O
available	O
on	O
that	O
X	B-Operating_System
server	O
.	O
</s>
