Stable screen tear low latency vsync

Octopus66 · 27 July 2016, 23:01

Hello, I have a screen tear in native resolution (HD) toward the top of the screen (looks like 1 line, possibly 2) which is stable and does not move. This exists with all config set-ups if I use Low Latency Vsync @ 50Hz. Is there a way I can hide this at the very top (or bottom) of the screen so to remove the effect? Thanks! Kristian

I am using WinUAE x86 3.3.0

Toni Wilen · 29 July 2016, 14:33

If it is fully stable, most likely it is driver feature and only way to hide it is to use double buffer mode (which of course increases latency).

Attach winuaebootlog.txt and winuaelog.txt to confirm. (tick logging checkbox in paths panel, boot to vsync mode, wait few seconds, quit, attach logs)

Octopus66 · 31 July 2016, 11:20

Hi Toni thanks for the reply. I will attach the logs when I get the next opportunity. I remember seeing this thread http://eab.abime.net/showthread.php?t=76491.
Post 6 you mention something about hiding a stable screen tear in the vblank. It is an old post, is that not actually possible? Thanks for your help.

Toni Wilen · 02 August 2016, 16:19

It is not yet implemented but now that you reminded me, it will be in next version (probably command line only, something line "-scanlineadjust -5")

Octopus66 · 02 August 2016, 21:28

Great to hear, looking forward to testing it out.

Octopus66 · 29 August 2016, 11:16

Hello, just wanted to say the 3400 beta 3 seems to work wonderfully. A -scanlineadjust of 50 moves the stable screen tear off the visible screen on my system so I can play Pinball Fantasies AGA and Lionheart at full screen 1920x1080 low latency vsync with no buffering. Great stuff!

Octopus66 · 13 February 2017, 22:56

Belated thanks again for getting this into 3.4.0 stable. Sent a donation (not just for this addition, as it is one of my most used programs!).

Toni Wilen · 14 February 2017, 12:32

Thanks. I forgot about this already, hopefully I don't break it too soon.. (Sometimes it can happen too easily with these kinds of hacks)

Octopus66 · 02 October 2021, 16:22

Hi Toni - is it possible to bring this back in to the latest release? Thanks

27 July 2016, 23:01	#1
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Hello, I have a screen tear in native resolution (HD) toward the top of the screen (looks like 1 line, possibly 2) which is stable and does not move. This exists with all config set-ups if I use Low Latency Vsync @ 50Hz. Is there a way I can hide this at the very top (or bottom) of the screen so to remove the effect? Thanks! Kristian I am using WinUAE x86 3.3.0 Last edited by prowler; 28 July 2016 at 00:23. Reason: Back-to-back posts merged; please use the 'Edit' button.

31 July 2016, 11:20	#3
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Hi Toni thanks for the reply. I will attach the logs when I get the next opportunity. I remember seeing this thread http://eab.abime.net/showthread.php?t=76491. Post 6 you mention something about hiding a stable screen tear in the vblank. It is an old post, is that not actually possible? Thanks for your help. Last edited by Octopus66; 31 July 2016 at 11:21. Reason: Missing word

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29 July 2016, 14:33	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	If it is fully stable, most likely it is driver feature and only way to hide it is to use double buffer mode (which of course increases latency). Attach winuaebootlog.txt and winuaelog.txt to confirm. (tick logging checkbox in paths panel, boot to vsync mode, wait few seconds, quit, attach logs)

02 August 2016, 16:19	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	It is not yet implemented but now that you reminded me, it will be in next version (probably command line only, something line "-scanlineadjust -5")

02 August 2016, 21:28	#5
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Great to hear, looking forward to testing it out.

29 August 2016, 11:16	#6
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Hello, just wanted to say the 3400 beta 3 seems to work wonderfully. A -scanlineadjust of 50 moves the stable screen tear off the visible screen on my system so I can play Pinball Fantasies AGA and Lionheart at full screen 1920x1080 low latency vsync with no buffering. Great stuff!

13 February 2017, 22:56	#7
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Belated thanks again for getting this into 3.4.0 stable. Sent a donation (not just for this addition, as it is one of my most used programs!).

14 February 2017, 12:32	#8
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	Thanks. I forgot about this already, hopefully I don't break it too soon.. (Sometimes it can happen too easily with these kinds of hacks)

02 October 2021, 16:22	#9
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Hi Toni - is it possible to bring this back in to the latest release? Thanks

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