Image on full slide in beamer package

I would like to make a slide of only one image without any borders or any other beamer specific element.

I tried :

\begin{frame}[plain]\includegraphics[keepaspectratio=true,width=1\paperwidth]{kernel-panic.png}\end{frame}

But I still get a border on the left, top and bottom.

Later edit: width=1.2\paperwidth seems to remove top and bottom borders. I still have a left border and some navigation elements on bottom right.