seattle and vegas driver won't sync

[haynor666]

My Arcade PC has now enough power to run some seattle and vegas games at 100 % stable but both groovymame and standard mame won't sync with waitvsync and/or syncrefresh. Those game always run at maximum speed or about 199%. This happen on G3258 with Radeon 4350 and 4670k with GTX770. Setting ddraw and triplebuffer does not help either. I can run those games with throttle but then tearing is visible.

[Calamity]

What's the native refresh of those games? Please get a log when possible.

[haynor666]

Gauntlet Dark Legacy: initial 640x480@57 but hardware changes to 511x384@60,386. GM picks 704x480@60,386.
CarnEvil: initial 640x480@57 but hardware changes to 399x256@54,123. GM picks 400x256@54,124

[Calamity]

Yeah, there are speed issues with the Carnevil game, search this forum and you'll find some reports. I confirmed this too. But I don't know what's the possible reason. Not related to ATI drivers anyway. Need to check official MAME too.

[haynor666]

Official MAME works almost the same way. Unthrottled and no synced all the time.

[Malenko]

spit ballin ideas here but would changing the dip on the board  (in MAME)  from medium to standard res help at all?>

[haynor666]

Does not matter.

[haynor666]

I think we might have answer why there are such problems with syncrefresh - http://forum.arcadecontrols.com/index.php/topic,150279.msg1571041.html#msg1571041

[intealls]

I'm unable to run Gauntlet Legends consistently at 100% on my 6700k@4GHz, in game it's at 100% but the speed oscillates a bit during transitions etc.

I used -triplebuffer -nowaitvsync -nosyncrefresh. Also did a quick test with standard MAME with gauntleg, and it seemed to perform similarly.

Edit:

I noticed the 199% speed thing as well on the 6700k, I have no idea what's going on. I also benchmarked the G3258, and it probably should be able to run the game at 100%, at least in gameplay, since it was able to run it above 100% speed consistently (see plot).

Edit again:

Regarding syncrefresh, try using -video d3d -nosyncrefresh -waitvsync, this worked for me. I was able to play through the first level without any noticeable drops!

[haynor666]

Subject is really old but worth noticing that issue is still in mame 257.

Maybe someone found configuration in groovymame to make those games stable ?

I had to disable any kind synchronization in groovmame:

waitvsync 1
sync_mode 0
refreshspeed 0
syncrefresh 0
throttle 1

[Calamity]

I think I know what happens with these games, will look into fixing it when I have some time.

(Basically these games perform bogus video updates, with empty data).

[haynor666]

I really appreciate it. Thank you.