quality of postscript display

[Steven K Thompson <skt@stat.psu.edu>]

I have Debian 2.2r2 on a Vaio F340 laptop.  When I view a
postscript file with gv, the type is broken and hard to
read on the display.  This is true for example when I try 
to view files in the Debian documentation that are provided
in postscript form, such as debian-guide, and is also true
when I have created the postscript file myself with dvips.
  In contrast, the type is very clear
for example when viewing a latex dvi file with xdvi.

Would my problem have to do with the fonts used in the
postscript file or something quite different?

I would appreciate any explanation and advice anyone can
provide on this.

Steve