I have a question about this setting before I pull the trigger and order a Vero V to replace my 4K+
I need to enable the “Lock HPD” option to prevent my projector (BenQ TK800) losing signal when starting a 3D movie.
My main reason for upgrading to a Vero V is to support Dolby vision playback on my TCL TV which the Vero will be connected to via an HDMI matrix switch.
If I lock the HPD, I presume that the Vero won’t detect the TV’s display capabilities, including DV support, from the EDID.
If this is the case, is there a workaround through DISP files or other EDID setting or spoofing solution?
In summary.
My projector supports HDR10 and 3D but needs HPD lock enabled.
My TV also supports DV which I would want to use where available (no 3D but I can control whether movies start in 3D even if the Vero thinks is can do 3D)
My understanding is enabling the HPD setting just keeps the Vero from kicking off a handshake if it detects a change to its HDMI’s plug status. The display capabilities would be detected on startup and not change until the next reboot.
The detect on reboot is the key i guess if this is the case.
if i want to play DV on my TV, and the EDID is locked to the projector (no DV), i would need to reboot the Vero to update the EDID.
The Vero should only be connected to one or other device at a time via an HDMI matrix switch.
The HPD lock is the only way I know to get 3d working on my projector so will always be enabled.
You’re right—locking HPD typically breaks real-time EDID detection, so the Vero won’t reliably see your TV’s full capabilities (including Dolby Vision).
The usual workaround is to use a fixed/custom EDID (DISP file) that advertises DV while keeping HPD locked for the projector. Some users also handle this at the HDMI matrix level if it supports EDID management per output.
So yes, it’s doable, but you’ll likely need a “best of both worlds” EDID setup rather than relying on auto-detection.
That’s looking like a good option, especially as I’ll have the 4k spare anyway.
I can’t see a better solution which will allow each display to work properly.
I need HPD lock for 3D on the projector and pass through audio for the AVR which I can set on the 4k, and EDID detection with 2 channel audio for the TV with Dolby vision support which I can configure in the V. (Just ordered yesterday)
I still don’t understand why HPD lock is required for 3D to work from the Vero, my Bluray player switches between the TV and projector, including switching to 3D mode automatically, without any need for such workarounds.
You could upload a log with HPD Lock disabled so we can see EDID.
Then you could probably use a disp_cap_3d file to bodge any missing modes if not advertised properly by your AVR/Projector.
This looks like the issue, It repeats several times before I stopped the video.
During this time the projector had no display, and no audio started either.
[WHITELIST] Searching the whitelist for: width: 1920, height: 1080, fps: 23.976, 3D: true, 3d mode flags: 0x20
I’ll need to check with HPD lock enabled, would this change the whitelest behavioiur or display mode change?
As expected it has the same issue with switching my projector to.3D, but is otherwise working well switching between my TV with Dolby Vision support detected and working, and the projector with only HDR 10.
If there’s no way to get the Vero V to handle 3D with HPD lock disabled, I will connect the Vero 4k+ for 3D use.