I'm using Xmame with MythTV, so I've got the machine hooked up to my television via tv out (using an NVIDIA graphics card with the 6111 driver). In order to make the television video look normal I've got overscan set to 0.979 and then have the GUI on MythTV shrunk down so that it isn't off screen.
The problem is that after running Xmame with "-x11 1" and quitting out it looks like the overscan value for X gets reset. This isn't just a MythTV problem, if I run Xmame the same way outside of MythTV the overscan is also reset. I can't tell you for sure what value overscan is reset to, it looks like it might be 0.5, as I can see a a small black border all the way around the desktop, which isn't the case when it's set to .6 or higher.
I've tried using "-x11 3", but the problem there is that this particular fullscreen mode respects the overscan settings, i.e. the edges of the game end up off the screen, so it's not really usable for game playing (though it might not reset overscan... since it didn't properly display games I didn't really care whether or not it worked properly afterwards).
I've not found anyone complaining about this, so I'm not sure whether it's the video card or people don't often use TV-Out when using Xmame... anyhow I was hoping you might have some suggestions on how to solve this problem, I tried emailing Lawrence Gold but he didn't have any insights. Any hints you might be able to provide would be a great help.
Thanks for your time,
Doug
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Erm,
-x11-mode 1 means your using DGA, dga can (and most of the time will) switch video modes, if you're using XFree4.x or xorg it will use any videomode your X-server can handle on your monitor independent of what is defined in /etc/X11/xorg.conf (This is how X reports things, not how xmame handles things)
Once xmame exits it asks the X-server to restore your default videomode, I don't know how you set this "overscan" value, but I guess it gets reset by X when xmame asks X to restore the default mode. You could try putting this overscan value in your x-config as part of the default mode.
You could also try to lett xmame restore the last mode instead of asking X to restore the default mode, todo this enable TDFX_DGA_WORKAROUND = 1
in your makefile and recompile (you only need to delete the xmame.obj/unix.x11 dir, no need todo a full make clean)
Regards,
Hans
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