Fix Latex-beamer

A recent upgrade of latex on my Debian/Ubuntu caused some problem on compiling my latex-beamer slides. Latex reported that

l.17 \pgfdeclareimage[
width=14pt,height=12pt]{beamericonbook}{beamericonbook}
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

According to some posts on the forum, it is because the latest version of latex put pgf package to core. Thus, the original pgf package become obsoleted.

To fix this, you can just go to your latex directory and remove the whole pgf directory. On my machine by default, it’s

/usr/share/texmf-texlive/tex/latex/pgf

remove this and the problem solved.

I wrote this because I found no explicit solution on the Internet. I tried a couple of times removing different pgf packages (they are scattered in more than one places) and finally found this solution.

Happy hacking.