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ValveSoftware / openvr

OpenVR SDK
http://steamvr.com
BSD 3-Clause "New" or "Revised" License
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Missing 90Hz mode when using a PSVR2 headset with an AMD graphics card #1869

Closed Anheurystics closed 3 days ago

Anheurystics commented 1 week ago

The headset itself supports 90 and 120 Hz, but for some reason (either due to the runtime itself or the graphics driver), the 120Hz option is force selected automatically with no choice of switching. Seems to be a problem only with AMD devices, as Nvidia graphics cards can switch between 90 and 120 Hz.

TheDeveloperGuy commented 1 week ago

This is a "feature" of the AMD drivers, and the only way it can be worked around is by deleting the 120Hz modes from the PSVR2 EDID.

Anheurystics commented 1 week ago

Thanks for the reply, appreciate the work you've done on this. Is this something that can be overridden by Custom Resolution Utility? The VR2 headset only shows up on the list of displays when Direct Mode is disabled, so I'm not sure if modifications would carry over once Direct Mode is enabled.

TheDeveloperGuy commented 1 week ago

No idea. Why don't you try it? How are you disabling Direct Mode?

Anheurystics commented 1 week ago

Just tried it, Custom Resolution Utility doesn't show the VR2 headset as active in its default, Direct Mode state. Using SteamVR to disable Direct Mode (Three horizontal bar menu in SteamVR window > Developer > Developer Settings > Disable Direct DIsplay Mode) makes it appear in CRU, at the cost of the headset not working with SteamVR at all. So it doesn't seem like modifying the EDID works, at least for the PSVR2 adapter

TheDeveloperGuy commented 1 week ago

It's possible to use hardware to override the EDID, but unless you already have a DP-AUX emulator (that I produced in limited numbers, and have no plans to produce more of) that route is not available. I was able to get the Sony driver working on AMD @ 90Hz with some messing around. I'll see if I can package that into the soon to be available driver overrider that I'm making as part of my efforts to override/add to the behaviour of the Sony driver.

You can close this as it's not a SteamVR issue.

TheDeveloperGuy commented 2 days ago

Interesting, the latest PSVR2 firmware allows the headset to switch EDIDs. It offers the 90/120Hz EDID or 90Hz only by deleting the 120Hz EDID.

Hello Sony! :)