I am new to texlive. After I downloaded the files from ACM website:
Alternate ACM LaTeX2e Style File V2.5 (MAY 2012 CLS) Alternate ACM LaTeX2e Sample File V2.0 (MAY 2012 LaTeX) ACM LaTeX2e Sample BIB File Graphic #1 (EPS) Graphic #2 (EPS) Graphic #3 (PS)
I used command
pdflatex sig-alternate.tex. I got an error as below:
! LaTeX Error: Unknown graphics extension: .ps.
While if I use
latex sig-alternate.tex. The compilation can be done, but with some warnings like:
 No file sig-alternate.bbl.
I have the file
And I couldn't open the generated
sig-alternate.dvi with preview. After
dvipdf sig-alternate.dvi, I found the references section is missing.