GroovyArcade - Games running consistently above 100%

[pugamer1]

Good afternoon!  First time poster and relatively new linux user, so please be patient with me.   

I recently installed GroovyArcade to a USB stick (to replace an old build using wahcade) and everything appears to be working perfectly except for the game speed.  All games consistently run at approximately 125% or so, and combinations of throttle, vsync, and syncrefresh don't seem to fix the problem.  I'm at a loss and would appreciate any help in solving this problem.

I'm not at home, but off of memory my build is running an older P4 using the onboard VGA port run to an iSymphony LCD TV.  I tried the LCD monitor preset, but the resolution was too high and all of the games were lagging badly.  Switching to VESA_480 puts the games into 640x480, but the refresh rate is 72Hz.  Could this increased refresh rate (over 60Hz) be causing the issues?  The games are definitely running faster and the sound is being affected.

Hitting F11 in-game displays the speed, and hitting F10 in game appears to have no effect.

Sorry for what is likely a simple question, but I'm baffled and otherwise the GroovyArcade package has been exactly what I've been looking for in an arcade software solution.... so I'm not ready to give up on it yet. 

Thanks!!

[cools]

The refresh is the issue

[pugamer1]

Yeah, I had a feeling that might be the case.  I'm fairly certain  the tv supports 60hz as it is 1360x768@60 during the boot sequence.  Once advancemenu opens up it switches to 640x480@72.

Is there any way to force advancemenu and mame to run at 640x480@60?

Thanks again!!

[Calamity]

Hi pugamer1,

Yes, this is a problem with monitors that have EDID and you use a standard resolution. X will try to use the highest refresh possible regardless what you ask for. The solution is to use a non-standard resolution, that doesn't match with anything reported by the EDID. For this reason the scripts in gasetup use 648x480 instead of 640x480, or at least they should, or did. Anyway, you can try to do this manually. Create a modeline with the vesa preset using command line switchres (switchres 848 480 60 --monitor vesa_480). Then place the modeline in its place in xorg.conf. Try with different widths in case 848 x 480 already exists in your system (notice I used 848 instead of 648 to try to match your TV aspect).

[pugamer1]

Thanks for the help, I'll give that a shot tonight!

I did get the xorg.conf file, and it does show the modeline calling out "648x480x60.00"

When the cabinet boots up I do get 640x480@60Hz during the splash screen, and then it jumps to 1360x768@60Hz for a few seconds while some of the boot sequence is progressing.  It isn't until Advancemenu fires up that it jumps to 640x480@72Hz.  This resolution (and refresh rate) are also present in MAME when a game is started as well.

Not sure if that matters, but just another piece of information.  Thanks so much for the help, I'll fiddle around with those updates to the modeline tonight.

Thanks!!!