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Roku Ultra has greyish blacks

10,592 1,820 November 4, 2017 at 10:00 PM
I have an LG OLED c6p television. I have been using the Roku 2016 streaming stick for a while but just hooked up the Roku Ultra. My streaming stick had nice deep blacks but the Ultra seems kind of grey even when hooked up to the same HDMI port. Why is this? It's very noticeable. Even the black bars on the top and bottom of extra wide movies are grey. Those bars used to blend in perfectly with the actual black bezel of the TV. Hoping to find a fix because while watching Guardians of the Galaxy 2 in UHD there were a few scenes that were underwhelming because of it

Here are some comparison pictures. Even taking a picture of the screen shows how drastic of a difference it is. All the settings of the TV are identical. I even tried changing HDMI cables in case that was the issue.

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#2
It has to be a setting on the Roku from what your explaining. My guess is it has to do with resolution scaling happening when the file is playing etc.
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#3
I believe the 2016 Streaming Stick (model 3600) does not support HDR10 while the Ultra certainly does. Your experience seems backwards, so I'd definitely look through the Ultra's settings page and see how it's configured.
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#4
Are there settings somewhere? I can't find any. The only thing I can find is changing the HDR from 4:2:2 (I think this is Dolby Vision which the Ultra doesn't even support) to 4:2:0. Other than that, I can't find any settings to change.
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#5
I don't have that model Roku but is there any setting to do with RGB color range? 16-235 vs 0-255 ? Looks like the Roku may be sending the wrong one. Or check the receiver settings for that option - it may need to be set per input device.
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#6
Quote from EyeBaller
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I don't have that model Roku but is there any setting to do with RGB color range? 16-235 vs 0-255 ? Looks like the Roku may be sending the wrong one. Or check the receiver settings for that option - it may need to be set per input device.
I don't have a receiver. They're connected directly to my TV. I only see the option to change 4:2:2 to 4:2:0. I think I can also choose the display type. That was set to auto detect at first and then I tried switching it to 4K 60Hz HDR or whatever (I think it was the last option in the list) but that didn't fix it.

I just have it unplugged right now since I'm not using it. I'll try again tonight after work
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#7
Have you tried this?

LG HDR TVs: Home > HDMI > Settings > Advanced > Picture > HDMI ULTRA DEEP COLOR > On > Restart


Edit: Also it's borderline criminal that you have such a great display but no receiver for complete sound to go with it! EEK!
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Last edited by EyeBaller November 7, 2017 at 08:20 AM.
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#8
Quote from EyeBaller
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Have you tried this?

LG HDR TVs: Home > HDMI > Settings > Advanced > Picture > HDMI ULTRA DEEP COLOR > On > Restart


Edit: Also it's borderline criminal that you have such a great display but no receiver for complete sound to go with it! EEK!
Yes all of my HDMI ports are set to Ultra Deep Color

I wanted to start my surround setup with that Fry's Klipsch deal but I missed on the shipping! I swear I looked for it when I happened to wake up at 7am but the code didn't work at the time and I assumed it was because it supposed to be store-only. Then when I checked later that afternoon I saw people said they got some shipped. I do have an old Home Theater in a Box that's still unopened (Samsung HT-E6730 that I got on clearance several years ago) but I would rather sell that and get a pieced-together setup.
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Last edited by RUsum1 November 7, 2017 at 10:47 AM.

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#9
Quote from RUsum1
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Yes all of my HDMI ports are set to Ultra Deep Color

I wanted to start my surround setup with that Fry's Klipsch deal but I missed on the shipping! I swear I looked for it when I happened to wake up at 7am but the code didn't work at the time and I assumed it was because it supposed to be store-only. Then when I checked later that afternoon I saw people said they got some shipped. I do have an old Home Theater in a Box that's still unopened (Samsung HT-E6730 that I got on clearance several years ago) but I would rather sell that and get a pieced-together setup.
Other thing I would do is unplug the tv from the wall, wait a minute or two then power everything back up. Might be a weird issue with HDCP.
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#10
Check for any other hdr / dolby vision / picture modes in the TV settings that may be relevant. Try the 4:2:0 setting on the roku see if it changes anything. Search at AVSforum but for the love of god use a unique password they were just hacked again.
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Now I noticed at the beginning of the movie it very briefly showed "HDCP unauthorized" but then it went away and the movie played just fine. But this is not even a UHD movie that I am playing. And when I do select a UHD movie, it will play and not give the message. My display type screen shows "Detected: 4K HDR at 60Hz HDCP 2.2"

Tried unplugging the TV and plugging it back in. Didn't change anything
Tried following these steps [roku.com] . Didn't change anything
Tried using a different HDMI cable (here [bhphotovideo.com] is the one currently connected to the Ultra. It was shipped with my TV). Didn't change anything
Tried different HDMI ports on my TV. Didn't change anything

The only thing that is changing is my level of frustration.
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Last edited by RUsum1 November 7, 2017 at 05:59 PM.
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#12
Quote from RUsum1
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Now I noticed at the beginning of the movie it very briefly showed "HDCP unauthorized" but then it went away and the movie played just fine. But this is not even a UHD movie that I am playing. And when I do select a UHD movie, it will play and not give the message. My display type screen shows "Detected: 4K HDR at 60Hz HDCP 2.2"

Tried unplugging the TV and plugging it back in. Didn't change anything
Tried following these steps [roku.com] . Didn't change anything
Tried using a different HDMI cable (here [bhphotovideo.com] is the one currently connected to the Ultra. It was shipped with my TV). Didn't change anything
Tried different HDMI ports on my TV. Didn't change anything

The only thing that is changing is my level of frustration.
Any help here? https://forums.roku.com/viewtopic.php?t=100755​
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Quote from RUsum1
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The only thing that is changing is my level of frustration.
You haven't tried any of my suggestions. It sounds like setting the roku to 4:2:0 may make a difference.

Have you check for a software update for the TV?

Your TV has the following picture modes among others:
HDR Vivid, HDR Bright, HDR Standard,
Dolvy vision: Vivid, Movie Bright, Movie Dark

Please experiment with the picture mode.

Go search at AVS forum, you're far more likely to find what you're looking for there.
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#14
Quote from jkee
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You haven't tried any of my suggestions. It sounds like setting the roku to 4:2:0 may make a difference.

Have you check for a software update for the TV?

Your TV has the following picture modes among others:
HDR Vivid, HDR Bright, HDR Standard,
Dolvy vision: Vivid, Movie Bright, Movie Dark

Please experiment with the picture mode.

Go search at AVS forum, you're far more likely to find what you're looking for there.
I did change to 4:2:0 (I mentioned that setting but I guess I didn't specify that I changed to it).

My picture mode is set to ISP Expert Dark or something like that. I basically followed settings I found online then applied it to all inputs.

The fact that my Stick looks fine but the Ultra does not makes me think it's the device, not the TV.

I did find out that Roku has an online chat so I used that last night. I was able to send the guy the two pictures that I posted here. He agreed that it didn't look right so he is escalating my issue and I'll see where it goes from there.
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Quote from RUsum1
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I did change to 4:2:0 (I mentioned that setting but I guess I didn't specify that I changed to it).

My picture mode is set to ISP Expert Dark or something like that. I basically followed settings I found online then applied it to all inputs.

The fact that my Stick looks fine but the Ultra does not makes me think it's the device, not the TV.

I did find out that Roku has an online chat so I used that last night. I was able to send the guy the two pictures that I posted here. He agreed that it didn't look right so he is escalating my issue and I'll see where it goes from there.
Conceivably a TV could apply different picture more settings to different input devices (even on the same hdmi port). I don't think many if any do, but I like to eliminate things like that as possibilities.

There are clearly some differences in the output signal of the two devices, but there may also be differences in how the TV is interpreting the signal that could be at issue. You could always try some other tests like hooking both devices to another tv or computer monitor to see what happens.

It's also difficult to accurately capture photos like you did short of using a DSLR and tripod and keeping the lighting and exposure exactly the same. It's quite noticeable in your photos, but I know the actual TV may look worse or better than the pics.

I was surprised your TV has a documented serial rs-232 and telnet interface.
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