Comment 76 for bug 755841

(In reply to comment #41)
> Can you reproduce this using only mplayer? I think that mplayer's "-vo x11" is
> the same as mythtv's "xshm" driver? But using "-vo x11" I still get tearing
> (which is what I would expect).

Using "mplayer -vo x11" I still see video tearing.

Are you sure that mplayer's "-vo x11" is the same as mythtv's "xshm" driver?
MythTV also provides a xlib driver that I would think is more in line with the mplayer "-vo x11" option.

When I use mythtv's "xlib" driver I still see video tearing.

I do not see video tearing when I use mythtv "xshm" driver.

> Is the rest of your desktop somehow vsynced? By that I mean that when you for
> example rapidly move a window left-right-left-etc ('shaking' it), do you see
> tearing on the window (I do)?

On my production PVR, I am using a up-to-date mythbuntu 11.04 build with the mythtv ppa 0.24.x updates applied. I do not have the desktop "vysnced". When I rapidly move a window left-right-left, I see video tearing.

On my motherboard I set the BIOS to use the maximum amount of dedicated shared memory for the GPU -- 128 MB in my case. As far as I know, any extra memory required is dynamically allocated.

> Are you using compiz (or related wm)? Or do you
> have some other form of compositing enabled? (e.g. xfce's windowmanager also
> supports compositing, to draw a dropshadow beneath windows.)

The compositor is not enabled in XFCE4, at least according to the settings manager.