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***ToastyX*** · 11-29-2022, 07:10 PM

(11-28-2022 05:51 PM)aidmaster@hotmail.com Wrote: I am trying to add a 1920x1080 59.934hz custom resolution on my Win10 RX5500XT pc, but with no success. I can create other resolutions, but this one specifically i can't. My monitor is a LG Flatron M2280A, and works fine with my other VGA cards, including the integrated one (Intel HD Graphics). The refresh rate used on the other VGA cards is 59.934hz, but with the RX5500XT it only shows the 50.000hz, 59.940hz, and 60,000hz on windows, and with any of these the image is bad. Can somebody help me, please?

The refresh rate is not the problem. What is the actual problem you're trying to solve? What do you mean the image is bad?

***ToastyX*** · 11-29-2022, 07:11 PM

(11-28-2022 02:16 PM)dsir67 Wrote: Hello, I've been having a problem with new LG oled C2 and my RTX3060 video card. I came across this CRU utility and website and am hoping someone here can help.

I've been beating this up for a couple weeks now, and although some progress has been made I'm still not where I need to be. The entire detailed thread on avsforum is here: https://www.avsforum.com/threads/new-lg-...t-62116130

Reverting to a specific older Nvidia driver helped some of the issues, but at the end of the day I am still unable to choose any 4K PC resolutions above 60Hz in the NCP. The TV goes dark and says no signal. I can VNC into the PC and see the desktop. The computer itself will accept the 100/120Hz 4K settings when they are selected, the TV just loses sync.

I ran the CRU utility and exported the EDID. Have attached to this post. Hoping there is useful info in there, or someone here has some ideas. AM open to all suggestions.

Honestly, it sounds like there's a hardware problem somewhere because this setup should work without problems. The EDID is fine, and the PC recognizes the resolutions, so the signal is getting distorted somewhere. You mentioned trying other cables, so I think either the video card or the TV is defective. If the video card has another HDMI port, try that just in case the HDMI port is bad. Try another HDMI port on the TV as well.

patrickge · 11-29-2022, 11:55 PM

i got a little problem right here with my laptop. I tried to add more 1080p resolutions to the settings but it only shows up the 90hz and not the other 120 or 144hz.

Original it´s an 1080p 60hz display, working flawless under 90hz so far with no problems Smile

im just curious now why i cannot add 120 or 144hz? Even if i try to add 70hz or 100hz it doesnt show up.

Any solutions?

thx in advance Angel

***ToastyX*** · 11-30-2022, 12:58 AM

(11-29-2022 11:55 PM)patrickge Wrote: i got a little problem right here with my laptop. I tried to add more 1080p resolutions to the settings but it only shows up the 90hz and not the other 120 or 144hz.

Original it´s an 1080p 60hz display, working flawless under 90hz so far with no problems

im just curious now why i cannot add 120 or 144hz? Even if i try to add 70hz or 100hz it doesnt show up.

The hardware has a limited amount of bandwidth. Your 90 Hz is showing 6-bit color, so there's not even enough bandwidth for 90 Hz with 8-bit color.

patrickge · 11-30-2022, 09:16 AM

(11-30-2022 12:58 AM)ToastyX Wrote:
(11-29-2022 11:55 PM)patrickge Wrote: i got a little problem right here with my laptop. I tried to add more 1080p resolutions to the settings but it only shows up the 90hz and not the other 120 or 144hz.

Original it´s an 1080p 60hz display, working flawless under 90hz so far with no problems

im just curious now why i cannot add 120 or 144hz? Even if i try to add 70hz or 100hz it doesnt show up.
The hardware has a limited amount of bandwidth. Your 90 Hz is showing 6-bit color, so there's not even enough bandwidth for 90 Hz with 8-bit color.

it's just an 6bit Panel build in.... this one: https://www.panelook.com/B156HAN02-1-AUO...76737.html

anyway i cant even change to 70 or 80hz for example. weird...

Jaytie · (Last edited: 11-30-2022, 11:10 PM by Jaytie)

Hi guys!
I used CRU quite a long time ago and just came back to it, with a new task, great tool after all Smile

:
So I'm also using a 42" 16:9 4K display. I created a custom 21:9 resolution (namely 3840x1600). When creating this relolution with "no scaling" activated the picture is centered.
What I try to achive is that the picture is displayed at the bottom of the screen instead of centered in the middle. Since I could not find anything about it: Can CRU do this?

Ironically my Screen/TV has this feature built it (LG C2 42). But when I display the picture on the buttom I can only use it with 60hz...

TnF · (Last edited: 12-01-2022, 09:37 AM by TnF)

Hello. I have been using CRU on many different systems through the years but currently i have one issue i cannot explain.
My system at the moment has an AMD 6900xt and 2 identical LG 27GL850 (1440p@144hz@10bit) of the latest revision (original revision was supposedly DP 1.4 but couldn't do HBR3, instead it had reduced timings from the factory to be able to just squeeze the signal into HBR2. But it was advertised as DP 1.4 and even had this option in the monitor menu but you could see 4x5.4Gbps link was the max. Not even reviewers caught this and there is no official revision in the model number anywhere, the revisions were found by the community. Liar LG)

Software wise i am running W10 22H2 with MPO disabled (as it causes problems like driver timeout crashes, issues in browsers etc, it's known windows issue and even nvidia posted reg edit to disable it as temp fix) and the latest 22.11.1 drivers that supposedly fixed the high Vram clock issue (yet again) - it doesn't, with my monitors i need to drop both to 60hz in order for it to downclock, even increasing vertical blanking doesn't fix it. Running single monitor if i remember in much older drivers it could downclock at 120hz but not at 144hz.

Or reddit in this driver release an AMD rep said this:
"It's ultimately contingent on graphics and display hardware. This isn't something that could be influenced by driver software (otherwise it would have been done already).

VBI on the other hand can be influenced by custom resolutions in Adrenalin, though that's pretty advanced and I don't generally like to recommend this."

But i know this is BS because there seems to be a limit where if the total pixel clock exceeds a specific value, vram clocks will switch to high because there is no other intermediary powerplay clock state to support that total bandwidth..It's 2022 and multimonitor high resolution/bandwidth users still get f*cked over with this. Nvidia does it too. They will never learn it looks like it.

edit: He also said this which confirms the above: "There are two key aspects to low idle mclk with multiple displays. Total display bandwidth and vertical blanking interval."

Anyways, i've decided to try overclocking one of my 27GL850 monitors as i know there are 165hz versions with the same panel and possibly TCON, and LG just put a software limit. It's pretty apparent because even at 155hz it works but displays an annoying out of range overlay dialog you can't disable. But anything lower and it doesn't do it.

The issue i am having is that while at factory timings 1440p@144hz@10bit both monitors will run HBR3 (4x8.1Gbps) all day, everyday at all scenarios, anything i've tried over that it will work but when the monitor is turned off (like windows display sleep timeout) and then you wake it up that will force DP link re-training, it will run into some kind of safe mode where it drops down bitrate to 6bit and HBR2 even though it just did work just fine before. I can see that quite easily because any color gradient shows visible banding.

When this happens in the radeon settings it will make bit depth option disappear, and windows resolution information in settings will still show 10bit when it's clearly not. To recover from here i need to drop to 120hz (which is one of the standard monitor modes, not a custom one) change bit depth to 8bit, then switch back to my overclocked setting and re-set to 10bit and it will stay at HBR3 until DP link retraining is initiated again. This method works 100% consistently but i could also just switch to 120hz and back without changing bit depth but this doesn't have 100% success.

I've tried different timings but i couldn't find any settings that will prevent this from happening. Also changing the "Voltage swing" and "PreEmphasis" overrides didn't make any difference. However i've noticed a couple of other weird things. First i get a 3rd entry of this monitor in CRU with the factory edid conf that is never active, and when it swiches to HBR2 6bit from HBR3 10bit the actual refresh rate changes (example from 150hz to 149.9xxxhz)

My guess this happens because it tries to do some kind of quick DP link re-training and it fails, so it switches to HBR2, but since it can't do that refresh rate at that resolution it reduces bitrate to minimum and re-tries (since it should be possible to run it at 8bit, but it skips that entirely).

Here are some screenshots (here 148hz because i was trying to see if it happens at different refresh rates too):

Running with overclock HBR3 no issues: https://i.imgur.com/Y7Gb5CO.png
Running with overclock after it locks into 6bit HBR2: https://i.imgur.com/oIkSDSu.png
Running stock settings HBR3 144hz: https://i.imgur.com/N5VLZkL.png
Some reference timings at 150hz: https://i.imgur.com/smJskaU.png (weirdly here it says CVT timings will fit into HBR3 but CRU locks you well before that, why??)

Also i have one more general question..when overclocking a freesync monitor you need to increase the freesync range in order for it to work up to the new overclocked refresh rate or not? Also. does the pixel clock limit you can edit there play any role? (i did increase those in my case if it's relevant)

dsir67 · 12-01-2022, 11:09 AM

(11-29-2022 07:11 PM)ToastyX Wrote:
(11-28-2022 02:16 PM)dsir67 Wrote: Hello, I've been having a problem with new LG oled C2 and my RTX3060 video card. I came across this CRU utility and website and am hoping someone here can help.

I've been beating this up for a couple weeks now, and although some progress has been made I'm still not where I need to be. The entire detailed thread on avsforum is here: https://www.avsforum.com/threads/new-lg-...t-62116130

Reverting to a specific older Nvidia driver helped some of the issues, but at the end of the day I am still unable to choose any 4K PC resolutions above 60Hz in the NCP. The TV goes dark and says no signal. I can VNC into the PC and see the desktop. The computer itself will accept the 100/120Hz 4K settings when they are selected, the TV just loses sync.

I ran the CRU utility and exported the EDID. Have attached to this post. Hoping there is useful info in there, or someone here has some ideas. AM open to all suggestions.
Honestly, it sounds like there's a hardware problem somewhere because this setup should work without problems. The EDID is fine, and the PC recognizes the resolutions, so the signal is getting distorted somewhere. You mentioned trying other cables, so I think either the video card or the TV is defective. If the video card has another HDMI port, try that just in case the HDMI port is bad. Try another HDMI port on the TV as well.

Thank you for the help and checking the EDID. Did try all ports on the TV. I'm leaning toward the card/hdmi port being culprit. Unfortunately I only have one HDMI and 3DP. I purchased a Displayport to HDMI adaptor and can now achieve 120Hz@4K.

Miosaurio · (Last edited: 12-01-2022, 02:27 PM by Miosaurio)

I am using my old PC, as it is at my parents house, now the problem for some reason my screen does not have the resolution it should have.

I am stuck in 1024 x 728 instead of being 1366 x 728 , I really do not understand why this is happening , I tried to use this application (which appears in all the tutorials to change resolution) but I do not get the new resolution in "all modes" I honestly do not understand what is going on .

these are the options of my monitor :
https://imgur.com/a/OMDTw5U

the program detects the resolution that should be but I don't know why it doesn't appear :
https://imgur.com/a/gdrDzFq

information:
graphics: ATI Radeon 3000 (older than dinosaurs)
Display: a generic JVC TV
OS : WIN 10

***ToastyX*** · 12-01-2022, 07:42 PM

(12-01-2022 02:27 PM)Miosaurio Wrote: I am using my old PC, as it is at my parents house, now the problem for some reason my screen does not have the resolution it should have.

I am stuck in 1024 x 728 instead of being 1366 x 728 , I really do not understand why this is happening , I tried to use this application (which appears in all the tutorials to change resolution) but I do not get the new resolution in "all modes" I honestly do not understand what is going on .

these are the options of my monitor :
https://imgur.com/a/OMDTw5U

You don't have the driver installed for the GPU. AMD doesn't officially support the Radeon 3000-series with Windows 10, but maybe the Windows 8.1 driver will work: https://www.amd.com/en/support/graphics/...adeon-3000