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Old 09 December 2017, 11:15   #1
Locash
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Low Latency Vsync Black Screen

Morning all,

I'm trying to setup Low Latency VSync for smooth scrolling at 50hz but am hitting an issue. As soon as I start the emulation the Winuae displays black screen with looping sound and shows 99FPS.

Pressing F12 brings up the menu and lets Winuae draw the screen correctly for a frame. Changing to legacy vsync seems to work ok.

I found an old post from June which was showing a similar issue, logs displaying warnings about unstable vsync this was resolved by updating to the latest nvidia drivers. Have tried this but still hitting the same issue, any thoughts?. Cheers

OS = Win10 1073
Nvidia Drivers = 388.59

Logs and config attached.
Attached Files
File Type: txt winuaelog.txt (6.8 KB, 21 views)
File Type: txt winuaebootlog.txt (14.9 KB, 21 views)
File Type: uae Test.uae (12.9 KB, 18 views)

Last edited by Locash; 09 December 2017 at 11:24.
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Old 09 December 2017, 14:44   #2
Toni Wilen
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Log shows the nvidia or windows issue (I am not really sure if it is Windows or drivers or both or neither..) that reports 10000Hz+ refresh rates.
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Old 09 December 2017, 15:57   #3
hexaae
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Just a question...
What if a user has a G-Sync system? Should still enable also "Low Latency VS, 50/60Hz" and gain faster joystick input for example?

Last edited by hexaae; 09 December 2017 at 20:11.
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Old 09 December 2017, 17:45   #4
Dr.Venom
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Quote:
Originally Posted by Locash View Post
Morning all,

I'm trying to setup Low Latency VSync for smooth scrolling at 50hz but am hitting an issue. As soon as I start the emulation the Winuae displays black screen with looping sound and shows 99FPS.

Pressing F12 brings up the menu and lets Winuae draw the screen correctly for a frame. Changing to legacy vsync seems to work ok.

I found an old post from June which was showing a similar issue, logs displaying warnings about unstable vsync this was resolved by updating to the latest nvidia drivers. Have tried this but still hitting the same issue, any thoughts?. Cheers

OS = Win10 1073
Nvidia Drivers = 388.59

Logs and config attached.
What Toni said.

I had the same issue on my Win 10 NVidia setup last september with (then) most recent NVidia driver.

For me the solution was to revert to an older NVidia driver from March 2017. So you would think it's the NVidia driver.

Then after some recent Windows update (maybe Fall Creators update) it seems a new(er) NVidia driver was installed again (my current version is dated October 27th 2017) and interestingly the low latency issue with D3D9 is no longer there for me, it works without issues now.

So I guess you could try:
  • to update your Win 10 setup from 1703 to 1709 and see if the problem solves itself, or
  • (if you want to stay with your current Win10 version) try the older NVidia driver from about March 2017.
Most probably one of them will solve the issue..
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Old 09 December 2017, 17:59   #5
Locash
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Thanks for taking a look Toni and Dr.Venom, it is such a weird issue.

I have tried rolling back the driver through the months but no joy, will change Windows patch target tonight and give the 1709 creators update a go and report back. Cheers
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Old 10 December 2017, 03:18   #6
Locash
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Updated Windows to build 1709, issue has gone away and low latency vsync is working correctly Cheers both.
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Old 10 December 2017, 10:38   #7
Dr.Venom
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Quote:
Originally Posted by Locash View Post
Updated Windows to build 1709, issue has gone away and low latency vsync is working correctly Cheers both.
Great
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