Question about VRR on a LCD monitor

[tonyt76]

If i understand this correctly, using Switchres 2.0 and the -monitor lcd option, do i need to do anything else to get VRR working in Groovymame?

If i'm using Windows 10, do I need to use an AMD video card?

[tonyt76]

Anyone?

[pakoman]

Hi.

I pasted my mame.ini below as I don't remember if I needed to change anything. That one works fine with a freesync 4k benq and a Nvidia gtx 1650 with VRR.  For CRT effect I use reshade and CRT-Royale, instead of MAME's HLSL. Still is not a real CRT,  but I'm quite happy with the result.  Check the character's shadows in Samurai Shodown 2 to test that is working.

If the VRR range is up to 60hz I'd recommend to overclock slightly the monitor up to 61hz at least for all those games with 60.XX hz refreshes. (there are tutorials for this in google)

BTW does your setup support more than 70hz when using VRR ? If so, please could you test in GROOVYMAME a MSDOS game for me ? (I can post the required files)

Code: [Select]

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[tonyt76]

Thanks I am using this monitor:

https://www.lg.com/us/monitors/lg-32gn650-b-gaming-monitor

[tonyt76]

What is Switchres 2.0?

Switchres 2.0 is a modeline generation engine for emulation. The Switchres project has become an independent library, and with it, GroovyMAME has been reworked, to hopefully achieve a cleaner and more robust integration.

New features:

Automatic LCD monitor preset: now -monitor lcd dynamically creates a fixed resolution preset based on your reported monitor timings, so GM can adjust output refresh rate to match game's refresh on supported graphic cards (Windows: AMD; Linux: AMD, Nvidia, Intel), within the Hz range defined by -lcd_range <min_refresh-max_refresh>. In Windows, it requires -allow_hw_refresh.

[tonyt76]

@Calamity does this work with NVidia cards in Windows 10?

[Calamity]

Hi tonyt76,

@Calamity does this work with NVidia cards in Windows 10?

No, as it's clearly specified in the text you quoted.

Now, you don't need that feature at all. You have a Freesync monitor. Just download baseline MAME and use default options, except -lowlatency that you must enable. That's all you have to do.

[tonyt76]

Thank you Calamity!

[joobloo]

I have a Nvidia RTX 2070 Max Q connected to a 240hz Freesync Premium monitor (Legion Y25-25) and I'm able to get VRR working with the attached mame.ini. Enabling "refresh_dont_care" seems to allow Groovymame to generate a proper modeline. I also had to use Custom Resolution Utility (CRU) to delete a 60hz 1080p resolution from the monitor's EDID that Groovy would latch onto for whatever reason, which prevented Ms. Pac-man and other 60.60hz games from running at 100% speed. Also, this is a laptop, and the built-in screen is a 144hz G-Sync display, which works too. I'm sure Calamity will chime in and say this ini is all wrong lol, but it seems to work. I was thinking of trying custom timings for each monitor too at some point.

Code: [Select]

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