Emulator

Please change the title, should say "fullscreen" instead of screen :P

I believe its been reported a few times in other issues that have been fixed (issue 6964 for example) forcing vsync in ccc fixes the tearing and frame skipping for me. It wont fix the dialog box issue but its a good work around if you need to play something in opengl.

i7 4770k @ 4.5ghz
Radeon 7950 boost (latest beta drivers but i dont think they touched ogl)
16gm ram
win8.1 x64

Issue 7025 - dialog box issue

"I believe its been reported a few times in other issues that have been fixed ( issue 6964 for example) forcing vsync in ccc fixes the tearing and frame skipping for me. It wont fix the dialog box issue but its a good work around if you need to play something in opengl."

Yeah, but like I said, if the game falls under 60/50FPS it automatically halfs the FPS because that's how Vsync works. Maybe a workaround for fast enough systems, but if someone doesn't reach fullspeed all the time this isn't a fix.

I used the words work around because its not a fix... make sure to force vsync in catalist control center and not in dolphin. For whatever reason it makes a big difference.

All of the above issues apply to me as well. 7970 @ 925/1375, Stock BIOS & 14.3 Beta, Windows 8.1 x64 + x64 Dolphin.

I can reproduce this issue. OpenGL's vertical sync does not appear to function properly on my Radeon R9 290 GPU (I was able to reproduce this on my old 7970 as well). I am able to force vertical sync in CCC by choosing the "Always On" option for "Wait for Vertical Refresh", but the "On/Off, unless application specifies" options do not appear to have any effect. Basically, the vertical sync option in Dolphin doesn't seem to function as intended for the OpenGL back-end.

Sorry for the double post, but I've got a bit more to add after further testing. One other unfortunate side effect of this is that the frame limiter cannot be fully removed when vsync is forced. The limit will only go as high as it takes to get the game to your monitor's refresh rate. For example, games that natively play at 60 FPS will not see any change, while games that play at 30 FPS can go up to "only" 200% speed.

One strange thing I found that may be related to issue 7177 is that it is possible to allow the frame limit to go beyond your refresh rate with vsync enabled by disabling idle skipping; however, this does not actually speed up the game - it just makes the sounds and music play faster. For example, on a 60 Hz monitor, Brawl may report 225% speed. Its sounds as music will be much faster, but the actual logic and gameplay will continue to tick only sixty times per second. In the Legend of Zelda: The Wind Waker, you may get 250% speed. In reality, the sounds and music will play at 250%, while the game itself will play at 200%.

This isn't entirely related to the vertical sync issue, although it is an issue that does somewhat stem from it since there don't appear to be any proper workarounds or solutions.

Reproduced here, log: http://vpaste.net/8NiqN
Line "29:15:435 GLInterface\WGL.cpp:29 E[Video]: No support for SwapInterval (framerate clamped to monitor refresh rate)." is clearly a bug.

I look in here https://github.com/dolphin-emu/dolphin/blob/master/Source/Core/DolphinWX/GLInterface/WGL.cpp#L134 and for me code to get wglSwapIntervalEXT pointer should be in MakeCurrent.

I found this:
Some ATI GLX drivers may report WGL_EXT_swap_control yet actually export glXSwapIntervalSGI.

http://www.opengl.org/wiki/Swap_Interval

Fwiw, you guys should make bVSync a int Variable all together. Adaptive Vsync requires -1 but bool can only be 1 and 0.

ATI Drivers, ie. old drivers. AMD Driver should do that, also recent ones - 14.4 have GL_ARB_buffer_storage support so now GL_AMD_pinned_memory is only useful for AMD legacy products (HD4xxx and older).

glxinfo on Linux Mint 16, doesn't show me GLX_EXT_swap_control.

I assume this is an AMD driver issue then.

Nevermind, it actually does show up :D

What'S the difference between GLX_EXT_swap_control and GLX_SGI_swap_control?

Alright. VSync broke somewhere between 4.0-619 and 4.0-690. Before 4.0-619, Dolphin will not show a SwapInterval warning and VSync is working.

https://github.com/dolphin-emu/dolphin/commit/5a599d472e49ef364748b880c379617635622280

Commit that broke VSync on OpenGL.

Dem silly one line off errors. SwapInterval extensions was grabbed in the wrong method. Oh snap.

This should be fixed by Exclusive Fullscreen. I can test this if no one here does.