LG 31MU97

I have also a MSI GTX 980 Gaming (SLI) and did not have any issues with resolution changing. Mine has always been 4096x2160 @ 60hz since the day I got it and has never changed.

I am using windows 8.1, what O/S are you on? Also, is your displayport 1.2 enabled in the OSD? Another thing maybe the cable? What dp cable are using.

And have you tried using the nvidia control panel to setup custom resolutions?
 
shadow85 said:
I have also a MSI GTX 980 Gaming (SLI) and did not have any issues with resolution changing. Mine has always been 4096x2160 @ 60hz since the day I got it and has never changed.

I am using windows 8.1, what O/S are you on? Also, is your displayport 1.2 enabled in the OSD? Another thing maybe the cable? What dp cable are using.

And have you tried using the nvidia control panel to setup custom resolutions?
Click to expand...

I am on Windows 8.1,, Display port 1.2 is enabled on the OSD and the cable is the one that comes with the monitor (the one I've been using since day one).
I have tried with another DisplayPort calbe (Displayport to Displayport - not mini like the original) and I get the same behaviour.

After a lot of playing I did manage to set a custom resolution in the Nvidia control panel (using CVT reduced blank option), but's it does not show the resolution as native or recommended as in your case.
Another inconvenience of not having it "auto-detect" is that, if I change the cable from one of the DisplayPorts of the card (it has 3) I have to set it manually each time.

Any clues?
 
shadow85 said:
I have also a MSI GTX 980 Gaming (SLI) and did not have any issues with resolution changing. Mine has always been 4096x2160 @ 60hz since the day I got it and has never changed.

I am using windows 8.1, what O/S are you on? Also, is your displayport 1.2 enabled in the OSD? Another thing maybe the cable? What dp cable are using.

And have you tried using the nvidia control panel to setup custom resolutions?
Click to expand...

What Driver versions are you using on the Nvidia and the LG?

Mine are:
Nvidia: 9.18.13.4709
LG: 1.0.0.0

I appreciate your comments.

Best regards.
 
Can the White levels be caliberated on a Monitor. When I move a window with a white background around the screen , it is Whiter on the top and yellowish in the middle and bottom of the screen. Is the panel defective or is this normal of white backgrounds on an IPS panel.

Unfortunately , I live in India and paid $1900 for the Monitor including Shipping and Duties/Taxes from newegg.com. , so do not have an option of an exchange.
 
juanmih said:
What Driver versions are you using on the Nvidia and the LG?

Mine are:
Nvidia: 9.18.13.4709
LG: 1.0.0.0

I appreciate your comments.

Best regards.
Click to expand...

Where did you find the LG display driver for the 31MU97? It doesn't show up on their site and not included with my display.

I'm also having the same issue that showed up just after a few weeks of use.

Win7 x64 was picking up the 4096x2160 resolution just fine and now it's max is showing 3840x2160.

EVGA 04G-P4-2982-KR (GTX980 Superclocked)
Display Port (1.2 enabled)
Nvidia drivers: 344.75, tried upgrading to 347.25.

Creating the custom 4096x2160 with CVT blanking still has the OSD resolution warning popping up and my game doesn't see the 4096x2160 resolution anymore (yes, windows is using that custom resolution).
 
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I have tried 4 LG 31MU97

1: Light yellow on left, right and underside. + Large darker spot left off center on top (good RGB channels)
2: Warmer on bottom, cooler on top + Green channel shift of 10% (too green)
3: Warmer on bottom, cooler on top + Darker on left (didn't like this one)
4: Strong yellow spot on lower left corner (otherwise good planel) (good RGB channels)
5: On order...

I really like the LG 31MU97... but there is no good panel consistency. I hate ordering and returning screens like this, but I need new displays.
 
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I wish LG improved QC on their Panels.

Someone (NKirov) on Macforums removed the uneven Whites and Yellow using i1 Display Pro X Rite Calibertor.

Quoting below:

I noticed that when I first got it, definite magenta cast to the lower area of the screen on whites and yellow towards the top, but since calibrating it with the i1 that has completely gone and whites are uniform. No amount of tweaking the settings manually got round the problem so I'd recommend the i1 Display Pro, money well spent. I use mine for report work and am now very happy with it, it's better than the Dell and the new big Eizo isn't available in the UK yet, plus I hate to think what it will cost.

Has anyone on Hardforum tried this. I really want to improve my panel as a return or exchange is not an option for me.
 
I've reloaded Win7 x64 from scratch with different nvidia drivers (344.60, 347.09, 347.25), tried a GTX770 instead of the GTX980, different cables, tried CentOS 7 with Nvidia 346.35 unix drivers. It's as if the 4096x2160 just disappeared from the 31MU97's EDID.

I've tried resetting the monitor, unplugged overnight, and tried turning DP 1.2 off/on again.
As 3840x2160 @60hz is available I'm assuming DisplayPort 1.2 is working?

I've added a custom 4096x2160 res with Nvidia 347.09 but any game so far only see's the 3840x2160 resolution whereas before the 4096x2160 was available and worked fine.

Still hammering away at this.
 
The i1 Display Pro can not remove the unevenness. It can only calibrate the whole display.

I have the i1 Display pro. What profile should I select? Wide gamut CCFL, White LED or RGB Led. The LG31MU97 is a wide gamut LED display.
 
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Sephrioth said:
The i1 Display Pro can not remove the unevenness. It can only calibrate the whole display.

I have the i1 Display pro. What profile should I select? Wide gamut CCFL, White LED or RGB Led. The LG31MU97 is a wide gamut LED display.
Click to expand...

I believe you'd have to choose WLED as the LG 31UM97 uses a GB-r LED backlight, which is a modified type of WLED to my knowledge.

You can read more about backlight types here
 
Nikyo said:
I believe you'd have to choose WLED as the LG 31UM97 uses a GB-r LED backlight, which is a modified type of WLED to my knowledge.

You can read more about backlight types here
Click to expand...

The problem is that the images will not get corrected to sRGB in the ICM profile I believe.
 
Signal60 said:
I've reloaded Win7 x64 from scratch with different nvidia drivers (344.60, 347.09, 347.25), tried a GTX770 instead of the GTX980, different cables, tried CentOS 7 with Nvidia 346.35 unix drivers. It's as if the 4096x2160 just disappeared from the 31MU97's EDID.

I've tried resetting the monitor, unplugged overnight, and tried turning DP 1.2 off/on again.
As 3840x2160 @60hz is available I'm assuming DisplayPort 1.2 is working?

I've added a custom 4096x2160 res with Nvidia 347.09 but any game so far only see's the 3840x2160 resolution whereas before the 4096x2160 was available and worked fine.

Still hammering away at this.
Click to expand...

That's very unfortunate, because I have had no issue like that since I got mine 2 months back.

What about firmwire? Can that be updated?
 
Sephrioth

Please could you post your experience with the i1 Display Pro and the Monitor, as you may have read my post above that states NKirov's experience who was very pleased with the results.

I will buy it , if you report positive results.

Thank you
 
Unfortunately, the i1 Display pro can help calibrate the display, but it can't take away the unevenness. If a panel has local differences in color, they are 'baked' into the panel itself. The i1 Display can't correct this unevenness only measure on a certain part of the screen and adjust the whole display profile based on that.
 
shadow85 said:
That's very unfortunate, because I have had no issue like that since I got mine 2 months back.

What about firmware? Can that be updated?
Click to expand...

idk.. some monitors have had the capability with a usb fat formatted stick with the firmware on it. Remains to be seen with this one.

This monitor is missing on the U.S. LG Support site. I was able to find some files on the LG AU (manuals, the truecolor software).

I managed to get a hold of the 31MU97 Windows Driver, but it doesn't help.
Either installing it prior to the nvidia drivers or after, I still see a max res of 3840x2160@60Hz.

In tearing apart the INF it looks like it's just trying to prefer the 4096x2160 resolution on display port, but it's being ignored by Windows and nVidia.

I can't believe it's not in the EDID. I have no idea how it even worked to begin with and what piece is causing a problem now. This was great for a few weeks.

juanmih is reporting the same and Mr__Death mentioned how it reverted on him but was able to set it again.

We'll see how far I get opening a ticket with LG.

edit: heh.. because the monitor is not in the L.G. support section, I can't select the product for support /facepalm.
 
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What about getting the unit replaced. Could it be possible the unit is defective? Because my unit has been 4096x2160 @ 60hz since the day I got it, and I have used it on several PC's and graphics cards.
 
Unfortunately I'm beyond the two weeks I had to return it to the store, now it's under LG's warranty process.

Can I ask what video cards/drivers your using?
 
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Iv used this monitor on my old i5-4670K rig which had a GTX 780, would have been the latest November/December drivers at that time and Windows 8.1 x64.

Then I switched it to my new i7-5930K rig, which has dual GTX 980s, using the current 347.25 drivers, and I also used the previous 347.09 and 344.75 driver also still with Windows 8.1 x64, and I have never experienced any issues with either setup/drivers.

I think you should try out a different video card, possibly a 900 series nvidia.
 
Signal60 said:
Unfortunately I'm beyond the two weeks I had to return it to the store, now it's under LG's warranty process.

Can I ask what video cards/drivers your using?
Click to expand...

Hi,

I was the first one complaining of the "lost" 4096x2160 resolution.
The problem was that particular unit.
The day after, with the DD conection (not with the HDMI) resolution was dropped to 640x480 and there was no way of changing it.
I returned it, got a new back, and without doing anything, I got the 4096x2160 Native resolution.

You should try to change yours...

Best regards
 
shadow85 said:
Iv used this monitor on my old i5-4670K rig which had a GTX 780, would have been the latest November/December drivers at that time and Windows 8.1 x64.

Then I switched it to my new i7-5930K rig, which has dual GTX 980s, using the current 347.25 drivers, and I also used the previous 347.09 and 344.75 driver also still with Windows 8.1 x64, and I have never experienced any issues with either setup/drivers.

I think you should try out a different video card, possibly a 900 series nvidia.
Click to expand...

It's not the videocard, I tried with a different one with the same issue.
It's the display, I got a new one, and it's perfectly smooth now.
 
Hi again,

this is the resolution that the LG was able to display. I believe that the DisplayPort circuit was broken as it had no problema with the HDMI.
It started with the issue of the "phantom" resolution 4096x2160 and suddenly one day it was like this 640x480 interlaced. Note that a few times after a reboot this very low resolution appeared but was gone after a new reboot so I did not payed to much attention...

IMG_0543.jpg


IMG_0544.jpg


So, as I preaviously said, I returned it, got a new one and withou touching resolutions or whatsover, I got the 4096x2160 resolution back automaticaly....

IMG_0552.jpg
 
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I have never managed to get my LG 31MU97 to run at 60Hz at 4096x2160. The highest it will run is at 57Hz using a custom resolution I setup in the NVidia Control Panel. 4096x2160 does show up as the recommended resolution however, it just shows up with a max refresh of 50Hz.

I had decided that my GeForce 670's were holding me back, and that once I upgraded 60Hz would work. Now I'm wondering if something is up with my monitor..... hmmmm.
 
Mr__Death said:
I have never managed to get my LG 31MU97 to run at 60Hz at 4096x2160. The highest it will run is at 57Hz using a custom resolution I setup in the NVidia Control Panel. 4096x2160 does show up as the recommended resolution however, it just shows up with a max refresh of 50Hz.

I had decided that my GeForce 670's were holding me back, and that once I upgraded 60Hz would work. Now I'm wondering if something is up with my monitor..... hmmmm.
Click to expand...

I believe that if the monitor is not able to automatically set the resolution and you need to do it via a custom resolution it's because something is wrong with the DP cicuit.
The behaviour that you experienced was similar to mine... I trid a different Card, bought a new DP cable... and couldn't get it automaticaly.
As son as I exchanged the monitor, it worked.
This is what I have now:

IMG_0553.jpg
 
Same thing with my old GeForce 650Ti BOOST. I upgraded to 970 and 60Hz was automatically running as the default.
Mr__Death said:
I have never managed to get my LG 31MU97 to run at 60Hz at 4096x2160. The highest it will run is at 57Hz using a custom resolution I setup in the NVidia Control Panel. 4096x2160 does show up as the recommended resolution however, it just shows up with a max refresh of 50Hz.

I had decided that my GeForce 670's were holding me back, and that once I upgraded 60Hz would work. Now I'm wondering if something is up with my monitor..... hmmmm.
Click to expand...
 
Well good news!!!! I was able to swap the monitor for a new one and had a chance to compare the two. :)

Bottom line, a portion of the EDID on the DP port got corrupted. The EDID is what tells the drivers what modes are available and in particular it was an extended EDID block that was corrupted.

I only dug into this as I thought I was going to have to wait weeks to get a replacement and wanted to know what happened in order to make a case with LG. Could have also been an nvidia issue.

Some things I learned trying to debug this:

The DP port uses EDID v1.4 while the HDMI port uses EDID v1.3.

The legacy EDID info (first 128 bytes) only allows for horizontal resolutions up to 4095 (yes, 4095).
For 4096 resolutions the extended block data added in the newer versions of the EDID spec is required. Without the extended blocks, we are stuck at 3840 resolutions only being detected.

In this setup, by default only the first 128 bytes of the EDID is stored in the Windows registry. According to Microsoft it is possible to use the extended EDID blocks in the registry and will override what is detected. I didn't get a chance to try this as I needed the good blocks to begin with.

The LG Monitor Driver only describes to Windows the ID of the monitor (by DP or HDMI port) and the preferred resolution for both. It does not provide anything else.

It is tough to find a tools that can read the extended blocks correctly. Especially the relatively new v1.4 spec. I resorted to Linux (CentOS 7) and the latest proprietary Nvidia drivers to help find the issue.

I'm still going to try and open a case with LG. I would like to find out if it's even possible to reflash the firmware or if that would even fix this. The replacement monitor was manufactured at the same time (Nov 2014) so suspect this could happen again.

Here's a couple of reports:
Corrupted http://pastebin.com/e36ru0jn
Working http://pastebin.com/Y5A2yWYE
 
WOW!

Brilliant job signal60!!!!

I don't know when mine was manufactured but I am also worried that the same problem reproduces.

Can I ask you where you found the date of manufacturing?

Again, well done!!!!
 
Quality Control is not very good for LG
I have recieved nr 5.

1: Light yellow on left, right and underside. + Large darker spot left off center on top (good RGB channels) rev 2.0
2: Warmer on bottom, cooler on top + Green channel shift of 10% (too green) -purple on wider viewing angles rev 1.0
3: Warmer on bottom, cooler on top + Darker on left (didn't like this one) rev 2.0
4: Strong yellow spot on lower left corner (otherwise good planel) (good RGB channels) rev 2.0
5: Warmer on bottom, cooler on top (worse than others) rev 2.0

Is there any LG 31MU97 that is not warmer on the bottom and cooler on the top?
 
Sephrioth said:
Quality Control is not very good for LG
I have recieved nr 5.

1: Light yellow on left, right and underside. + Large darker spot left off center on top (good RGB channels) rev 2.0
2: Warmer on bottom, cooler on top + Green channel shift of 10% (too green) -purple on wider viewing angles rev 1.0
3: Warmer on bottom, cooler on top + Darker on left (didn't like this one) rev 2.0
4: Strong yellow spot on lower left corner (otherwise good planel) (good RGB channels) rev 2.0
5: Warmer on bottom, cooler on top (worse than others) rev 2.0

Is there any LG 31MU97 that is not warmer on the bottom and cooler on the top?
Click to expand...

How can I check these with my unit? Im not familiar with this sort of thing.
 
5: Warmer on bottom, cooler on top (worse than others) rev 2.0
Click to expand...

I can see what Sephrioth is talking about there on my panel.

I run a solid black background. Opening a windows explorer window (Win7, something with a white background) and moving the window from bottom to top I can see the color tint change from a yellow (warm) to blue (cooler).
 
Signal60 said:
I can see what Sephrioth is talking about there on my panel.

I run a solid black background. Opening a windows explorer window (Win7, something with a white background) and moving the window from bottom to top I can see the color tint change from a yellow (warm) to blue (cooler).
Click to expand...

Ok this has happend to me actually. I noticed that the screen went to a brighter more warmish feel when I was browsing the web.

Doesnt happen often but it did notice this. Are all the panels like this? Is it some sort of design flaw?

It doesnt really bother me because it only happens rarely.
 
What happens to you if you switch-off and then switch-on your monitor while Windows is still running?

In my case it is like if Windows detects a new device (like when you you insert a plug&play device).

Is this a normal behaviour for DP?

It is annoying because if there are open Windows (like a browser for example) then they are "resized" to a smaller size.

Are your monitors doing the same? (or it could be the graphic card).
 
OK, So after diging a bit I found out that the DisplayPort is PnP interface a therefore the behaviour is normal.
I also found out that many monitors have a function called DisplayData Channel Command Interface (DDC/CI) that can be disabled to stop this behaviour.
The LG doesn't seem to have it.
Has anybody been able to stop this behaviour?

Thanks!
 
shadow85 said:
what graphics card are you running. My monitor does no such thing. I am running 2X GTX 980s and Windows 8.1.
Click to expand...

A single GTX 980 (MSI)...:confused::confused::confused:

Don't you get a sound like if you we're plugging in/off a USB device?
 
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juanmih said:
A single GTX 980 (MSI)...:confused::confused::confused:

Don't you get a sound like if you we're plugging in/off a USB device?
Click to expand...

Nope as a matter of fact I am switching my monitor on and off alot because I have my PC switched on for long periods of time.

It never had any issue at all, however when I used UltrMon to setup my tv to connect as a 2nd display, if I were to use each display as a main display whilst the other is off, I would not be able to switch back to the LG monitor if it was left on.

Basically I have to make sure it is switched off when my TV is running in single display mode, otherwise if I left the LG on it wont show up in windows or Ultramon to be able to switch back to it until I resterded the PC. If I did have the monitor switched off when running the TV, and then powered the LG back on, windows would detect it as a new display being connected and allow me to switch to it and use it.

But when running my LG as primary display I can switch it on and off in windows any time without any problems.
 
Well, finally I bought one of these and first impressions are good, BUT yes, it's warmer on the sides (specially left), like a pink tone... It disappears if you move your head.

And I'm not able to set it to max resolution and 60Hz... I guess my Geforce 670 can't make it.

I still have to decide if I keep it, replace or buy another display (Asus PA328Q was the other option).
 
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