AntiAliase can't work on my computer, but can on another!

[honeyhuang]

In my program, i use antialiase code such as "glEnable(GL_LINE_SMOOTH)",but after antialiase, the render result of the program was same as before, but when I run the same program on another computer, the result is obviously better than before.
Why? Please help me to find the problem. thanks!my graphic driver is SIS, not NV.

[Adam Luchjenbroers]

IIRC, It's really up to the vendor, how and if they implement anti-aliasing.

Some cards will just ignore the instruction (usually cheaper cards).