ZSNES and VSYNC (SOLVED)

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

I've noticed a shortcoming in the Linux version of ZSNES. It does not have a VSYNC option in the video config section. I find this strange, because it's there in the Windows version, and lack of VSYNC causes noticeable image tearing. Did I do something wrong when I installed it, or does anyone know if there is a way to set it somewhere else? I don't remember seeing a USE flag for it. Is it something that has to be set via SDL instead of through ZSNES itself?

prg · Tux's lil' helper Joined: 14 Oct 2005 Posts: 94

maybe you could try using an opengl mode and activate vsync in your drivers, like setting __GL_SYNC_TO_VBLANK=1 for nvidia cards

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

Ah...so it's a driver option? All my machines have cards that work with the open source radeon driver...any idea how I'd set that option with that driver?

prg · Tux's lil' helper Joined: 14 Oct 2005 Posts: 94

don't know, sorry, never used an ati card, but at least the closed source drivers should have a config tool for that

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

I don't see anything about it in my video card driver options...pretty much been through anything. I did discover if I enable page flipping without also enabling renderaccel, it goes REALLY slow, but with both enabled everything works great. Ah well...it looks like either the Linux version of ZSNES just isn't capable of VSYNC, or it's an option that has to be set through SDL itself.

mnxAlpha · Apprentice Joined: 15 Sep 2004 Posts: 210

Actually, X itself has no concept of vsync (unless you're using OpenGL).

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

Right...I am running ZSNES in OpenGL mode though, so you'd think there would be VSYNC support...I can't find it in the Linux version though.

na641 · Posted: Sun Dec 18, 2005 9:43 pm Post subject:

i have the same issue as well. I have vsync enabled (through nvidia-settings) and it really doesn't help too much.

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

Ah well, I guess it's just an issue with the Linux version of ZSNES then. I can't believe they left VSYNC out.

gaminggeek · Posted: Mon Dec 19, 2005 6:03 am Post subject:

try

Akaihiryuu · l33t Joined: 08 May 2003 Posts: 794 Location: Columbus, OH

Thanks...that did the trick. I wasn't expecting it to be a commandline switch, I was expecting it to be an option I could select in the configuration. Guess I should read man pages more often.

cotu · n00b Joined: 12 Sep 2004 Posts: 35

don't bother, it doesn't do anything, the vysnc code that the -w switch activates is disabled in the linux version, it was meant for msdos. here's the subroutine it uses (the following routine will never be called in the linux version as it would just segfault it);

na641 · Posted: Thu Dec 22, 2005 8:24 am Post subject:

Tuna · Guru Joined: 19 Jul 2002 Posts: 485 Location: Berlin

which oss radeon driver are you using? r200 or r300? i dont know about the r300 but for the r200 you should take a look here: http://dri.freedesktop.org/wiki/ConfigurationInfrastructure . the r200 at least gives an option for enabling vsync. the lazy ones would try to emerge "driconf". although it is masked it should work and give an easy way to set options for the DRI ConfigurationInfrastructure .