In case someone else has the same problem and finds this thread: it appears to have been a bug in Compton (https://github.com/chjj/compton), I'm running the latest Git version and can't reproduce this issue anymore. Hooray!

Hans

On Tue, Dec 4, 2012 at 11:56 AM, Hans Chen <hanswchen@gmail.com> wrote:
Hi ~d,

Thanks for trying to reproduce my results, I really appreciate it!

Oh, are you running mplayer in virtualbox? Can you reproduce this problem when running mplayer in xmonad directly? Is xmonad running on the guest or the host (or both)?

I realize now that I was unclear, sorry about that - no, mplayer and virtualbox are two separate examples, I run mplayer directly (and let xmonad handle the window). Same with virtualbox, xmonad is running on the host and the guest OS is Windows XP.

 
2. More detailed reproduce steps:
- Run "mplayer /path/to/video/file" in a terminal on [screen 1]. A floating
mplayer window should show up on [screen 1].
- Press "f" key to make mplayer fullscreen.

Nothing happens after this step! Perhaps we're playing with different versions of mplayer?

What do you mean with "nothing happens"? Doesn't mplayer fullscreen work at all? Can you get e.g. VLC to do fullscreen? I have the same problem there. I can also reproduce it with flashplayer, but that one's a bit different since by default Flash will exit fullscreen when it loses focus.

With best regards,
Hans