LG 31MU97

shadow85

Limp Gawd
Joined
Sep 27, 2009
Messages
489
I also just ordered a philips bdm4065uc. When I recieve it I am going to compare it for gaming.

Sometimes I feel 31" is slightly too small for gaming, pity this model isnt 40" aswell. Ohwells just gonna have to wait and see what the philips is like.
 

joseba01

n00b
Joined
Oct 1, 2014
Messages
13
I'll have to return mine. I don't know if I should ask for a replacement or go for another model.

 
Last edited:

Random123

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Joined
Feb 26, 2015
Messages
1
In sRGB mine has grayish/cyanish? tint on the right side of the monitor, for some reason after I bumped birghtness to 100% and back to 50ish the red tint from left seemed to have disappeared.

It's rev02 btw and cost, including tax and shipping ,1125€ from Germany.
 

shadow85

Limp Gawd
Joined
Sep 27, 2009
Messages
489
I have decided to sell my LG and keep the 40" philips. I like the color and vividness that I can set on the LG better, but the Philips size is just more immersive for gaming (my main use) so I have decided to sell my LG.
 

NIZMOZ

[H]ard|Gawd
Joined
Oct 23, 2007
Messages
1,825
Would you guys consider this monitor, or the LG 34" Curved, or the Dell curved 34"? I am trying to decide between this one and that one for my gaming / business work stuff. I love clarity and both seem to be good at that.
 

shadow85

Limp Gawd
Joined
Sep 27, 2009
Messages
489
I cant comment on the curved screens but if you got the 31MU97 u will be happy with its picture quality. It is very good.
 

fascinator

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Joined
Apr 14, 2015
Messages
2
Mine came in today but I'm 50/50. I've been using the Dell 30" U3011 for a long time and I love it, perfect screen.

But after hooking this up the backlight bleed is bothering me. You tell me if I'm being too sensitive or if this looks normal for an IPS. All of these are taken with my phone cam, so a little grainy.

Pure white in photoshop straight on:


Same, from the side:


From the front, but black background:


It's the bottom left on the dark screen that really bothers me, just feels cheap - but I might be crazy.

I'm also running a 680 gtx @ 4092x2160 and only able to do 50hz. I've tried two different DP cables.
 

turbineseaplane

Limp Gawd
Joined
May 6, 2014
Messages
204
My perfect LG 31MU97 has gone for sale in the "for sale/trade" section of the site if there's any interest.

I've gone 5k (but smaller of course) for my video work. The LG has been simply sensational however.
 

lordmocha

n00b
Joined
May 9, 2013
Messages
9
Edit: So I bought this monitor and tested myself. At 2048x1920 I can not get 61Hz (or 70Hz or 75Hz) to work. The custom resolution can be created and used (the monitor does not prevent it), however the image is very distorted.
 
Last edited:

lordmocha

n00b
Joined
May 9, 2013
Messages
9
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
Mine has the correct EDID however the resolutions are still missing: http://pastebin.com/F8GpaHb5

Though thanks to what you posted I was able to use the timings to get 4096x2160 working for me (by adding the mode to xrandr), thanks.
 

lordmocha

n00b
Joined
May 9, 2013
Messages
9
Hello.

xrandr (by itself, with radeon, and with amdgpu) does not seem to be able to read the extra edid information
xrandr with the closed source amd binary blob is able to read the extra edid information.
note: my timings are to three decimal places (556.730MHz) other peoples were to one decimal palce (556.7MHz) which caused occasional artifacting for me

So here is the output for those of you who want to copy down the timings.

Code:
Screen 0: minimum 320 x 200, current 4096 x 2160, maximum 16384 x 16384
DFP9 connected 4096x2160+0+0 (normal left inverted right x axis y axis) 621mm x 341mm
   4096x2160     60.00*+  50.00  
   3840x2160     60.00    30.00  
   2560x1440     60.00    30.00  
   2048x1536     60.00    30.00  
   1800x1440     60.00    30.00  
   1856x1392     60.00    30.00  
   1792x1344     60.00    30.00  
   1920x1200     60.00    30.00  
   1920x1080     60.00    59.94  
   1600x1200     60.00    30.00  
   1776x1000     59.94  
   1680x1050     60.00    59.94  
   1400x1050     60.00    59.94  
   1600x900      60.00  
   1280x1024     60.02  
   1440x900      60.00  
   1280x960      60.02  
   1152x864      59.96  
   1280x768      60.02  
   1280x720      59.86    59.94  
   1024x768      60.00  
   1152x648      59.94  
   800x600       60.32  
   720x480       60.00    59.94  
   640x480       59.94
Code:
DFP9 connected 4096x2160+0+0 (0x87) normal (normal left inverted right x axis y axis) 621mm x 341mm
	Identifier: 0x81
	Timestamp:  30370
	Subpixel:   unknown
	Gamma:      1.0:1.0:1.0
	Brightness: 1.0
	Clones:    
	CRTC:       0
	CRTCs:      0 1 2 3 4 5
	Transform:  1.000000 0.000000 0.000000
	            0.000000 1.000000 0.000000
	            0.000000 0.000000 1.000000
	           filter: 
	EDID: 
		00ffffffffffff001e6de77683b60200
		0b180104b53c22789ee9d5aa5034b625
		0e50542108007140818081c0a9c0d1c0
		01010101010150d000a0f0703e800890
		650c6d552100001a286800a0f0703e80
		0890650c6d552100001a000000fd0038
		3d1e8738000a202020202020000000fc
		0033314d5539370a202020202020026e
	SignalFormat: DisplayPort 
	ConnectorType: DisplayPort 
  4096x2160 (0x87) 556.730MHz -HSync -VSync *current +preferred
        h: width  4096 start 4104 end 4136 total 4176 skew    0 clock 133.32KHz
        v: height 2160 start 2208 end 2216 total 2222           clock  60.00Hz
  4096x2160 (0x88) 526.170MHz -HSync -VSync
        h: width  4096 start 4632 end 4696 total 4736 skew    0 clock 111.10KHz
        v: height 2160 start 2208 end 2216 total 2222           clock  50.00Hz
  3840x2160 (0x89) 533.280MHz +HSync -VSync
        h: width  3840 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 2160 start 2214 end 2219 total 2222           clock  60.00Hz
  3840x2160 (0x8a) 266.640MHz +HSync -VSync
        h: width  3840 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 2160 start 2214 end 2219 total 2222           clock  30.00Hz
  2560x1440 (0x8b) 533.280MHz +HSync -VSync
        h: width  2560 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1440 start 2214 end 2219 total 2222           clock  60.00Hz
  2560x1440 (0x8c) 266.640MHz +HSync -VSync
        h: width  2560 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1440 start 2214 end 2219 total 2222           clock  30.00Hz
  2048x1536 (0x8d) 533.280MHz +HSync -VSync
        h: width  2048 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1536 start 2214 end 2219 total 2222           clock  60.00Hz
  2048x1536 (0x8e) 266.640MHz +HSync -VSync
        h: width  2048 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1536 start 2214 end 2219 total 2222           clock  30.00Hz
  1800x1440 (0x8f) 533.280MHz +HSync -VSync
        h: width  1800 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1440 start 2214 end 2219 total 2222           clock  60.00Hz
  1800x1440 (0x90) 266.640MHz +HSync -VSync
        h: width  1800 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1440 start 2214 end 2219 total 2222           clock  30.00Hz
  1856x1392 (0x91) 533.280MHz +HSync -VSync
        h: width  1856 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1392 start 2214 end 2219 total 2222           clock  60.00Hz
  1856x1392 (0x92) 266.640MHz +HSync -VSync
        h: width  1856 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1392 start 2214 end 2219 total 2222           clock  30.00Hz
  1792x1344 (0x93) 533.280MHz +HSync -VSync
        h: width  1792 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1344 start 2214 end 2219 total 2222           clock  60.00Hz
  1792x1344 (0x94) 266.640MHz +HSync -VSync
        h: width  1792 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1344 start 2214 end 2219 total 2222           clock  30.00Hz
  1920x1200 (0x95) 533.280MHz +HSync -VSync
        h: width  1920 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1200 start 2214 end 2219 total 2222           clock  60.00Hz
  1920x1200 (0x96) 266.640MHz +HSync -VSync
        h: width  1920 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1200 start 2214 end 2219 total 2222           clock  30.00Hz
  1920x1080 (0x97) 148.500MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
  1920x1080 (0x98) 148.352MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  59.94Hz
  1600x1200 (0x99) 533.280MHz +HSync -VSync
        h: width  1600 start 3848 end 3992 total 4000 skew    0 clock 133.32KHz
        v: height 1200 start 2214 end 2219 total 2222           clock  60.00Hz
  1600x1200 (0x9a) 266.640MHz +HSync -VSync
        h: width  1600 start 3848 end 3992 total 4000 skew    0 clock  66.66KHz
        v: height 1200 start 2214 end 2219 total 2222           clock  30.00Hz
  1776x1000 (0x9b) 148.352MHz +HSync +VSync
        h: width  1776 start 1864 end 1908 total 2200 skew    0 clock  67.43KHz
        v: height 1000 start 1004 end 1009 total 1125           clock  59.94Hz
  1680x1050 (0x9c) 148.500MHz +HSync +VSync
        h: width  1680 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1050 start 1084 end 1089 total 1125           clock  60.00Hz
  1680x1050 (0x9d) 148.352MHz +HSync +VSync
        h: width  1680 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz
        v: height 1050 start 1084 end 1089 total 1125           clock  59.94Hz
  1400x1050 (0x9e) 148.500MHz +HSync +VSync
        h: width  1400 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1050 start 1084 end 1089 total 1125           clock  60.00Hz
  1400x1050 (0x9f) 148.352MHz +HSync +VSync
        h: width  1400 start 2008 end 2052 total 2200 skew    0 clock  67.43KHz
        v: height 1050 start 1084 end 1089 total 1125           clock  59.94Hz
  1600x900 (0xa0) 108.000MHz +HSync +VSync
        h: width  1600 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz
        v: height  900 start  901 end  904 total 1000           clock  60.00Hz
  1280x1024 (0xa1) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz
  1440x900 (0xa2) 108.000MHz +HSync +VSync
        h: width  1440 start 1624 end 1704 total 1800 skew    0 clock  60.00KHz
        v: height  900 start  901 end  904 total 1000           clock  60.00Hz
  1280x960 (0xa3) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height  960 start 1025 end 1028 total 1066           clock  60.02Hz
  1152x864 (0xa4) 81.750MHz -HSync +VSync
        h: width  1152 start 1216 end 1336 total 1520 skew    0 clock  53.78KHz
        v: height  864 start  867 end  871 total  897           clock  59.96Hz
  1280x768 (0xa5) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height  768 start 1025 end 1028 total 1066           clock  60.02Hz
  1280x720 (0xa6) 74.500MHz -HSync +VSync
        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  44.77KHz
        v: height  720 start  723 end  728 total  748           clock  59.86Hz
  1280x720 (0xa7) 74.176MHz +HSync +VSync
        h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  44.96KHz
        v: height  720 start  725 end  730 total  750           clock  59.94Hz
  1024x768 (0xa8) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz
  1152x648 (0xa9) 74.176MHz +HSync +VSync
        h: width  1152 start 1262 end 1302 total 1650 skew    0 clock  44.96KHz
        v: height  648 start  653 end  658 total  750           clock  59.94Hz
  800x600 (0xaa) 40.000MHz +HSync +VSync
        h: width   800 start  840 end  968 total 1056 skew    0 clock  37.88KHz
        v: height  600 start  601 end  605 total  628           clock  60.32Hz
  720x480 (0xab) 27.027MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock  31.50KHz
        v: height  480 start  489 end  495 total  525           clock  60.00Hz
  720x480 (0xac) 27.000MHz -HSync -VSync
        h: width   720 start  736 end  798 total  858 skew    0 clock  31.47KHz
        v: height  480 start  489 end  495 total  525           clock  59.94Hz
  640x480 (0xad) 25.175MHz -HSync -VSync
        h: width   640 start  656 end  752 total  800 skew    0 clock  31.47KHz
        v: height  480 start  490 end  492 total  525           clock  59.94Hz
 
Last edited:

DaCoTa

n00b
Joined
Oct 21, 2016
Messages
1
With ubuntu 16.10 (or, more precise, the newer Kernel with it) it is a bit easier, the following modes are available:
Code:
  4096x2160 (0x127) 556.720MHz -HSync -VSync *current +preferred
        h: width  4096 start 4104 end 4136 total 4176 skew    0 clock 133.31KHz
        v: height 2160 start 2208 end 2216 total 2222           clock  60.00Hz
  4096x2160 (0x128) 526.160MHz -HSync -VSync +preferred
        h: width  4096 start 4632 end 4696 total 4736 skew    0 clock 111.10KHz
        v: height 2160 start 2208 end 2216 total 2222           clock  50.00Hz
Note the slightly different timings compared to lordmochas post. Unfortunately, I still have occasional blackouts and glitches when running this.
 

Finny76

[H]ard|Gawd
Joined
Aug 31, 2002
Messages
1,172
Is there a NEWER model or replacement for the LG 31MU97 yet? I think this monitor first came out in 2014 and is almost 3yrs old now.
 

vujbigs

n00b
Joined
Aug 29, 2015
Messages
24
Is there a NEWER model or replacement for the LG 31MU97 yet? I think this monitor first came out in 2014 and is almost 3yrs old now.
Wow? Is it that old?

Time flies! I've been loving mine the entire time. Really a great monitor.

Edit: This made me search my email receipts - Yep! Fall of 2014 from Fry's
Amazing how fast it goes by!
 
Last edited:

Finny76

[H]ard|Gawd
Joined
Aug 31, 2002
Messages
1,172
Whats sad is that there is NO newer or comparable better monitor with such specs out there from LG. IF there is, then someone pleas enlighten me.
 

vujbigs

n00b
Joined
Aug 29, 2015
Messages
24
Sad to say that after a little over 2 years my 31MU97 died and LG is telling me it's around $350 to fix it.

Totally furious.
 

Finny76

[H]ard|Gawd
Joined
Aug 31, 2002
Messages
1,172
Sad to say that after a little over 2 years my 31MU97 died and LG is telling me it's around $350 to fix it.

Totally furious.
That sucks.....What is the warranty on LG monitors 1 year? I know ACER gives 3 years warranty that's why i stuck with them.
 

NIZMOZ

[H]ard|Gawd
Joined
Oct 23, 2007
Messages
1,825
I got rid of my LG for the Dell curved Ultrawide, and it is a much better monitor imho.
 

vujbigs

n00b
Joined
Aug 29, 2015
Messages
24
That sucks.....What is the warranty on LG monitors 1 year? I know ACER gives 3 years warranty that's why i stuck with them.
It depends upon region and the consumer protection laws...

Here in the USA we have the "hahaha ...you thought you would get some warranty from this large company??!" 1 year useless warranty.
Same monitor gets 2 years in Europe and 3 years in Australia from what I've heard so far.
 

Signal60

n00b
Joined
Jan 23, 2015
Messages
8
My corrupted EDID is back again. Of course this time with no warranty in play.

Original Post:
https://hardforum.com/threads/lg-31mu97.1838728/page-6#post-1041387616

Once again the 4096x2160 resolutions are corrupted (I tried both display ports).
I can override it in Windows but DirectX ignores it and reads it from the monitor anyway.

I'm trying to get into the Service Menu but not having much luck. I've read if you can do the NVRAM INIT it is supposed to re-flash the EEPROM where the EDID is stored.
I got a 31mu97 service manual but not having any luck with their instructions:



There are also ways to program it from Linux on the i2c bus but the descriptor is beyond the normal 255 byte range of the EDID page.
It's part of the Display Port spec. which I can find very little information on how to access.
 

Signal60

n00b
Joined
Jan 23, 2015
Messages
8
Well, I figured it out and resetting the NVRAM corrected the EDID issue.
I'm guessing as the 4096x2160 isn't part of the "normal" edid the write protect here doesn't work.

Just know that once you toggle the service menu mode nothing will pop up on the screen.
You have to press the joystick button and select left (menu) for it to appear.
It replaces the usual OSD Menu.

Once I selected NVRAM INIT and hit right the monitor reset, turned on and a diagnostic screen showed up letting you know what was plugged in and if the EDID was ok.

No source was needed for the menus to appear and I did this with nothing plugged in.


 

castlefire

n00b
Joined
Aug 28, 2014
Messages
50
Well, I figured it out and resetting the NVRAM corrected the EDID issue.
I'm guessing as the 4096x2160 isn't part of the "normal" edid the write protect here doesn't work.

Just know that once you toggle the service menu mode nothing will pop up on the screen.
You have to press the joystick button and select left (menu) for it to appear.
It replaces the usual OSD Menu.

Once I selected NVRAM INIT and hit right the monitor reset, turned on and a diagnostic screen showed up letting you know what was plugged in and if the EDID was ok.

No source was needed for the menus to appear and I did this with nothing plugged in.


etM2kuh.png

My LG31MU97 EDID is corrupt and trying to get into service Menu. ivebeen tyrying to figure out how. can you explain it to me thanks
 

UnknownSouljer

Supreme [H]ardness
Joined
Sep 24, 2001
Messages
6,676
I realize I'm bumping a super old thread, but rather that than start a new one.

Anyway, I just got one of these (literally 2 days ago). And I'm super happy. I was able to pick it up off of Craiglist for $450. The original user was having problems with Displayport blinking every so often (zero issues over HDMI), but after doing my reading before going down there to buy it, I knew a common problem was the cable. Especially considering that she wasn't having the same issue over HDMI.
The cable issue was a lot bigger than I thought. While trying to buy USB-C to Displayport cables, I literally only found one that actually supported DCI-4k as opposed to Ultra HD. Precisely one. I found others and literally asked the question, does this support DCI-4k, and it turns out that extra half-million pixels was a big problem.

Anyway, long story short, I came with the cable and tested it on my MBPt and it functioned there perfectly after testing it for well over 30 minutes (after the monitor warmed up is generally when the issue cropped up according to the seller). I also color calibrated it there with my i1 Display Pro just to try it out (6500k, 2.2, 100cdm). Also worked out great. I didn't bother to run every screen test (like I didn't check for bleed, but even on it's OSD big grey background, I don't notice it, so I don't really care). The person I bought it from is also an Industry editor, so it was well taken care of, and she was using it for the same purposes that I'm using it for now. I've been using it for two days and I've had zero issues while sitting in front of it for probably 8+ hours a day since I got it. If this bad boy carries me for the next 5 years, I'll be super happy. (Best 5 year old monitor ever).

First impressions?: This thing is incredible. Seeing things in 10 bit has changed my workflow (I can see color and tonality I haven't before). This is also my first display over 2560x1440 on desktop (or 2880x1880 on my laptop). It has given me so much real screen estate for FCPX. I haven't retouched in PS yet, but now I'm seeing color and tonality I haven't before. Images definitely look more organic. And images that I've printed, look way more like the prints (which should definitely help in the future for matching grades with prints). Zero regrets. I hope within the next few weeks to also set it up with an eGPU and then I'll really be able to grind through my workflow.
 
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