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Display problems - only IREM games - Groovy MAME running under WAH!Cade (SOLVED)

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galaxian77:
Hello there, fellow arcade gamers. I have a strange puzzle that I need some input on (if possible). I run a late version of Groovymame under the WAH!Cade frontend, outputting to a CRT arcade monitor. MAME games all work, and the frontend is setup, and all seems good. HOWEVER! There are a set of games (all by the same manufacturer! - IREM Corp) which run at a lower than normal refresh rate (55Hz) while most other games are 60Hz. My problem is that when I run any of these IREM games (Eg: Battle Chopper, Hammering Harry, Ninja Spirit), the game starts, but the picture is all distorted. I can see the game running, but it's completely out of sync. I've obviously tried adjusting the monitor POTS, but this does not help (at all). What even MORE strange, is that I exit the game, then re-load it, it sometimes syncs perfectly, and is fully running without a problem. Once I exit and open it up again, the same problem returns (out of sync / garbles graphics). This is really driving me insane, but I'm sure someone has seen this before. It could be possible that I don't have enough modelines setup, but GROOVYMAME is supposed to take care of this by itself. Is there anyone with this issue, or could anyone suggest anything I could try ?

Thanks for reading.

galaxian77:
*Update: I've still not figured this out, but will soon be experimenting with an older version of Groovymame that worked previously, as I still have the HDD with the old installation on it. I will be testing to see whether it's the "version" of Groovymame that's a problem, or whether the frontend (WAH!Cade) causes these ITEM games to glitch when starting them up somehow, and also to triple check my mame.ini and monitor setting (from the existing old installation).

At this point, I highly doubt the following to be problematic:

-The underlying Arch Linux (Groovyarcade) installation
-The monitor settings
-The monitor itself (seeing as the games in question ran 100% perfectly using the older version)

Suspected items:

-One setting in MAME.INI
-Monitor "type" setting may be wrong
-The new version of Groovymame may opt for the wrong modeline "occasionally"

I'll keep you updated.
Thanks for reading - and if YOU have any ideas, PLEASE post back here.

Thanks!

galaxian77:
OK... so... I've finally narrowed this down to the version of GroovyUME (which is part of the "2017" build of GroovyArcade). Most unfortunately, this version (I believe it's version 0.184) inherently does not run as smoothly (generally) as the older generation GroovyUME (0.145?). I've got other weird problems on my other two machines (regarding non-smooth scrolling issues). The frame rate indicator shows 100%, but there seems to be a tiny "slow down" or "jitter" at certain points in certain games (eg: Raiden, Twin Cobra), yet Cave games (DoDonpachi, etc) run perfectly. It's so strange!

I'll keep this post running until I find an answer.

Doozer:

--- Quote from: galaxian77 on March 12, 2018, 02:32:14 am ---OK... so... I've finally narrowed this down to the version of GroovyUME (which is part of the "2017" build of GroovyArcade). Most unfortunately, this version (I believe it's version 0.184) inherently does not run as smoothly (generally) as the older generation GroovyUME (0.145?). I've got other weird problems on my other two machines (regarding non-smooth scrolling issues). The frame rate indicator shows 100%, but there seems to be a tiny "slow down" or "jitter" at certain points in certain games (eg: Raiden, Twin Cobra), yet Cave games (DoDonpachi, etc) run perfectly. It's so strange!

I'll keep this post running until I find an answer.

--- End quote ---

Hi,

Have you already tried v0.195 from the drive? (link)
Lots of changes happened since 0.184.

galaxian77:
*Update*. I've now updated to the latest version of Groovyarcade (which employs v0.195) and this version has been rock solid. All of my previous problems have been resolved! I'm in the process of updating my game collection, but without a doubt the new "March 2018" Groovyarcade build is just amazing. I now use Attract Mode in all of my builds, as it's definitely a more flexible front end. Thanks to all who have read my posts, and thanks to Doozer for giving my post so much attention! I'm so happy right now!

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