LG C9 OLED & 1920x1440p

[Tofana10am]

Thanks! I’ll give that a try when I get home later today. Fingers crossed!!!

[Tofana10am]

That was it! It’s working like a charm now. Thanks for your help!

[MrPippet]

didn't LG just introduce 1440p for this years generation of oleds? The CX series I think

I think LG first introduced 1440p for the C9. I can't get 1440p on the C9 to work either. Is this a LG firmware issue or a Mister limitation? I can get 1440p to work on the Nano90 just fine. Makes me think this is an issue with LG's firmware for that generation. Thanks.

[Milspex]

Probably LG problem to be honest. I think the CX series has got it working properly for the first time. At least thats what I heard

[Mellified]

According to RTings.com both the C9 and CX support 1440p@120 natively and can be forced to use 1440p@60. It may be a recent firmware added 1440p@60 native support to the CX though.

They describe using a forced resolution in Windows:

We do this by creating a custom resolution in the NVIDIA Control Panel, then we change the Timing to 'CVT reduced blank' to reduce bandwidth. If unsuccessful, we then try 'CVT' and 'Automatic'. Finally, we check to see which resolution is active. Note that if the timing is set to 'Automatic', it can sometimes show that the active resolution is 3840 x 2160, even though the signal sent is 1440p.

Seems a custom MiSTer video_mode setting could do something similar.

[EeK]

Has anyone found a solution to this?

Technically, there shouldn't be anything preventing the C9 from doing 1440p60 (it works on PC), as it has the exact same panel a the CX (which works fine on MiSTer in 1440p60).

[HarborSeal]

I have an LG E6 OLED and I'm having the same issues Zorlac is having. 1920x1440 works on my PC, but not for MiSTer.

I did notice something interesting when I was fiddling with my TV settings. If I turn off the setting HDMI Deep Color, I can only choose 1920x1440 @ 30hz in the Nvidia control panel. When I turn HDMI Deep Color back on, 1920x1440 @ 60hz is available to use. Apparently, HDMI Deep Color has something to do with the HDMI 2.0 specs. Both my Nvidia card and the OLED tv are HDMI 2.0. I believe the MiSTer is an HDMI 1.x device.

Is it possible that the HDMI Deep Color setting on my TV may be causing problems with the MiSTer's HDMI interface when attempting to use 1920x1440 @60hz?

[zoopster]

Anybody revisiting this thread I got these settings working well on my LG OLED C7 with game mode set to 4:3:

video_mode=1920,48,32,80,1200,3,6,26,154128
vsync_adjust=2
vscale_mode=5

[zoopster]

Quick update: I had to switch to vsync_adjust=1 for the PSX core.