Originally Posted by fenster3000
Also ran into a pretty strange issue on my C9.
While playing on my PRO (does not matter if the title supports HDR, UHD etc.) the screen randomly goes black
for a second and then comes back. Sometimes this also happens while doing stuff in the main menu of the PS4.
If this happens while playing an HDR Game the TV also tells me that HDR is enabled (with that sweet little banner).
Now I have to find the issue. Already replaced the HDMI cable. Did not change it. Next:
Pulling the power plug for a few minutes on my PRO and on my TV.
I have not seen this issue while watching a BluRay on my BluRay Player. But this one is still an old fashion 1080p Player.
€: Also noticed this: While playing in HDR some pixels randomly are flashing red.
I guess I found the problem.
Looks like that there is a massive handshake problem between the C9 and the PS4 PRO.
This problem causes a softlock-like status between PS4 PRO and LG C9. Which results in a permanent-ficker wave.
At least as long as you turn off both devices... From what I have seen so far this flickering issue also happens on other
displays. So it might be a PS4 PRO issue. But the LG C9 also does some strange things as well.
Main problem is probably the difference between HDR and SDR Settings.
- In SDR my PS4 PRO is set to Full RGB. Same goes for the C9.
- In HDR my PS4 PRO is set to limited RGB. So is my C9.
Main problem here:
If the RGB settings on my PRO is set to auto it will "use" the settings my TV wants. Thats actually a problem.
For some reason the PRO and C9 have some different opionions on which format to use.
I do not know why. But it looks like this is the problem why the flickering starts while doing SDR stuff (actually...this happens also while you are doing nothing. Even while being in the main menu of the PS4).
So easy fix what? Yea. Nope not so fast. Selecting Full RGB on the C9 and PS4 PRO will cause problems if you want to play in HDR.
As soon as there is a HDR signal both the C9 and PS4 PRO will switch their RGB mode to Limited. For some stupid reason the C9 has an issue with that.
Thats where the next softlock starts: The C9 always tries to switch the RGB mode from Limited to Full, from Full to Limited... And guess what. Flickering is the result.
Possible fix for that: Switch the C9 as well as the PS4 PRO to Limited RGB. At least from what I can tell so far this fixes this issue.
But hey. We are not done yet. Next Problem:
- Looks like flickering can also occur of the PS4 switches its resolution from [email protected]
to [email protected]
YUV420 is used as soon as HDR kicks in.
My suggestion: Leave it on Auto. If you select using [email protected]
instead of automatic the PS4 PRO will also try to use this in HDR. As a result the PRO (and the C9) will deliver quite a few issues:
1. While in HDR you will see some flashing red pixels. Or some flashing lines.
2. Massive frame drops ingame
3. Flickering (of course
Most of you probably know the reason (bandwidth limitation). But hell yea. I do not even know why my PS4 PRO was fixed at [email protected]
in the first place.
But we got another issue with the Automatic setting on the PRO. This might not happen with all games. But from what I have seen so far
- The Last of Us Remastered
- Red Dead Redemption 2
have issues with that. I do not know why. But it looks like they switch between SDR and HDR to often during the loading screen. This, once again will cause a softlock.
Also make sure not to switch to the main menu of the PS4 while launching an HDR Game. Games I had no problems with regarding this issue: Uncharted The Lost Legacy, Days Gone, Shadow of The Colossus, Crash Nitro Kart and God of War. But the other two games made a lot of trouble. In that case the only way to get around the softlock: Select [email protected]
in the PS4 settings before you start the game. Then turn the TV and the C9 off (not just restarting in case of the PS4 PRO). And there you go.
Two quick videos:
Interesting note: I can not remember any handshake issues with my fathers Panasonic DXW784 and my PS4 PRO.