Just a couple things that came to mind when reading the bug description and comments...
When X "freeze", if you switch to a VT (by pressing Ctrl-Alt-F1), and then back into X (by pressing Alt-F7), is X still "frozen"?
I also wonder if it could be a problem specific to Xv. I do notknow if Totem output using Xv by default, but mplayer. So, since mplayer trigger the freeze when playing a video using the default Xv output driver, you could test in a pinch a different output driver with a command such as:
Just a couple things that came to mind when reading the bug description and comments...
When X "freeze", if you switch to a VT (by pressing Ctrl-Alt-F1), and then back into X (by pressing Alt-F7), is X still "frozen"?
I also wonder if it could be a problem specific to Xv. I do notknow if Totem output using Xv by default, but mplayer. So, since mplayer trigger the freeze when playing a video using the default Xv output driver, you could test in a pinch a different output driver with a command such as:
mplayer -vo gl /usr/share/ exemple- content/ Experience\ Ubuntu.ogg
Or even:
mplayer -vo x11 /usr/share/ exemple- content/ Experience\ Ubuntu.ogg
If either or both work (as in, do not freeze X), then we are on to something.