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Medic

macrumors member
Original poster
May 31, 2008
86
33
London, UK
Great news! Looking forward to it then.
LG software to split the screen does work too?
Sadly no because remember M1s laptops can only support one external screen and this split screen requires two outputs from computer and 2 inputs on the monitor (one USB3, one HDMI)...Not sure about this for M1 Mac mini.
 

Togun

macrumors newbie
Nov 25, 2020
12
2
Sadly no because remember M1s laptops can only support one external screen and this split screen requires two outputs from computer and 2 inputs on the monitor (one USB3, one HDMI)...Not sure about this for M1 Mac mini.
I am pretty sure that is incorrect.
The LG software to emulate several different screens requires only 1 input from USB-C.
The different option that requires 2 inputs from 1 or 2 computers is very different called PIP.
Software screen split if different - as you can see from many YouTube videos
 
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Medic

macrumors member
Original poster
May 31, 2008
86
33
London, UK
I am pretty sure that is incorrect.
The LG software to emulate several different screens requires only 1 input from USB-C.
The different option that requires 2 inputs from 1 or 2 computers is very different called PIP.
Software screen split if different - as you can see from many YouTube videos
Ah yes you're right. Apologies, I thought you were referring to the dual input aka PIP. I haven't tried the LG software. Not sure it's available yet either but will search and try.
 

yuser

macrumors member
Sep 18, 2009
56
9
My lg49wl95c-w arrived today.
But it will go back because there are two black spots in the middle of the screen - I guess dead pixels.
I can not accept that (too expensive to tolerate). I do not want to look at that every day.

LG Onscreen Control does not recognize the display at all.

I can select 5120 x 1440 (low resolution) with 60 Hz (also when attached to a CalDigit TS3+ via USB-C/Thunderbolt port).
 

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Saturn1995

macrumors member
Oct 28, 2019
43
87
This is a hard issue to nail down. I'm catching snatches of folks saying big sur is the answer to getting full 1440, but that seems wrong as all m1's should be arriving with big sur, so if that were true, why do people have it not working out of box??
 

Knowimagination

macrumors 68020
Apr 6, 2010
2,228
1,288
I’m very interested in this Just got my odyssey g9 on Saturday and my Mac mini should be here in the next week. Hope it won’t be too difficult to get it working properly.
 

Saturn1995

macrumors member
Oct 28, 2019
43
87
Possible solution. Seems too easy to be true, maybe it is. This reddit forum has someone confirming m1 works with 5120x1140, but you have to hold down option key when selecting res to get more options.

https://www.reddit.com/r/mac/comments/jvwju9/_/gcrmzlm
I've got an m1 mac mini coming and in the market for a dell 49" super-wide U4919DW, but nervous to pull the trigger. Can anyone with a m1 and a 5120x1440 display confirm?
 
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Togun

macrumors newbie
Nov 25, 2020
12
2
I get 5120*1440 with switchresX no problem.
Does not work out of the box with Big Sur and no LG software support.
 
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westwind

macrumors newbie
Dec 2, 2020
1
0
I am pretty sure that is incorrect.
The LG software to emulate several different screens requires only 1 input from USB-C.
The different option that requires 2 inputs from 1 or 2 computers is very different called PIP.
Software screen split if different - as you can see from many YouTube videos

I've come across the reply on japanize LG support site saying they are aware of these compatibility problems and they are planning to relese a new version on January or February. Looks like we'll have to wait.

As for that software screen spitting function, i got the impression (from Youtube videos) that the feature only allows to split screen area into zones and then stick windows to zone bordes. No more than that. It does not emulate strict screen borders, and you can resize zoned windows up to full screen width.
 

online919

macrumors member
Jun 19, 2018
59
22
I have the M1 and LG 49. The 5120x1440 shows up as low resolution at 60hz, the resolution is just too low and not usable for me, tiny font and blurry. I am now set at 3008x846, which is HiDPI, so the font is not blurry.
My biggest problem now is when the M1 wakes up from sleep, it either wakes up with wrong resolution, or can't wake up at all, or have a hard time to reconnect to the monitor. Very strange issue. I am using the usb c to usb c cable.
 

gutzynd

macrumors newbie
Dec 15, 2020
1
0
I am also suffering from connection/reconnection issues with my Samsung C49RG9x 5120x1440 monitor. I had hoped Big Sur 11.1 would improve this, but it doesn't look like anything changed.

Once it is set up (with SwitchResX) it works beautifully at 120 Hz (except for HDR), with DP version 1.4:
Code:
~ $ system_profiler SPDisplaysDataType
Graphics/Displays:

    Apple M1:

      Chipset Model: Apple M1
      Type: GPU
      Bus: Built-In
      Total Number of Cores: 7
      Vendor: Apple (0x106b)
      Metal Family: Supported, Metal GPUFamily Apple 7
      Displays:
        C49RG9x:
          Resolution: 5120 x 1440
          UI Looks like: 5120 x 1440 @ 120.00Hz
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: Yes
          Television: Yes

But getting my MB Air to recognize the display in the first place is a challenge. Most times, the display is shown in SwitchResX but the list of supported resolutions stays empty. After powering on and off the monitor a few times it is eventually recognized.

I am using the same USB-C hub for my Windows Surface Pro and Linux Thinkpad, and neither of these have any issues.
 

fdarby82

macrumors newbie
Dec 23, 2020
3
2
Just wanted to add a datapoint that I'm using a 3440x1440 display which works fine on my M1 Macbook Air. I have it connected through Displayport to a USB hub.
 

zm15

macrumors member
Jul 2, 2015
31
3
For those that have the actual monitor (or the Dell too), does the 5120x1440 on the LG 49" essentially look like the 2560 x 1440 on a 5k iMac in Low Resolution mode (thinking text crispness/clarity, etc..)? (holding down Option and selecting the low resolution version of the retina/HiDPI setting).

Trying to find/visualize an equivalent of what I can expect it to look like in person....
 
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Dammit Cubs

macrumors 68020
Jul 31, 2007
2,122
718
Just hearing about this now from the macrumors front page article:

So currently, I'm using a VIOTEK ultra wide 34 inch. and it does not seem to have any issues. Is this specific to monitors greater than the standard 3440x1440?

1608756426223.png
 

Barclay-Mac

macrumors newbie
Dec 23, 2020
2
0
England, United Kingdom
I’ve had a bunch of issues with the LG ultra fine screen with my M1 Mac Mini, but also 16” MBP.

I use a top spec USB3 or Thunderbolt cable and it won’t display 5k wide resolutions unless I do one thing:

Downgrade Display port v1.4 to Display Port 1.2 on the monitor.

Then the display seems to work (albeit without HDR support or the ability to select different refresh rates).
 

koopertron

macrumors newbie
Dec 23, 2020
4
1
I recently got the LG Ultrawide 49WL95C-W which I was keeping fresh for my ordered M1 MBA. The monitor has max resolution of 5120x1440...I received my MBA M1, 16GB and 1TB, and...the screen runs at max 3440 x 1080. ?

I searched around but can't find if this is a driver problem, OS and if there is a fix? Please help!
I finally got it working... although I have been other threads with M1 getting update soon, on this monitor you need to change the on the Monitor->Quick press the main button (bottom right) to bring mani menu-> Toggle Up-> Select "Menu"-> Select "System" -> Select "DisplayPort Ver." and change it to "1.2" - its usually on 1.4 (1.1 only goes to 4k).. hopefully with the update (next Mac OS update maybe 11.11? 11.2?) the newer 1.4 version will be supported, this is just a software / driver issue. See screenshot attached with M1 Mac using 5K. Note: I switched back and forward between my Intel Mac and my new M1 to get the setting changed over but once set, it stays
 

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koopertron

macrumors newbie
Dec 23, 2020
4
1
I recently got the LG Ultrawide 49WL95C-W which I was keeping fresh for my ordered M1 MBA. The monitor has max resolution of 5120x1440...I received my MBA M1, 16GB and 1TB, and...the screen runs at max 3440 x 1080. ?

I searched around but can't find if this is a driver problem, OS and if there is a fix? Please help!
I finally got it working... although I have been other threads with M1 getting update soon, on this monitor you need to change the on the Monitor->Quick press the main button (bottom right) to bring mani menu-> Toggle Up-> Select "Menu"-> Select "System" -> Select "DisplayPort Ver." and change it to "1.2" - its usually on 1.4 (1.1 only goes to 4k).. hopefully with the update (next Mac OS update maybe 11.11? 11.2?) the newer 1.4 version will be supported, this is just a software / driver issue. See screenshot attached with M1 Mac using 5K. Note: I switched back and forward between my Intel Mac and my new M1 to get the setting changed over but once set, it stays
 

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koopertron

macrumors newbie
Dec 23, 2020
4
1
I’ve had a bunch of issues with the LG ultra fine screen with my M1 Mac Mini, but also 16” MBP.

I use a top spec USB3 or Thunderbolt cable and it won’t display 5k wide resolutions unless I do one thing:

Downgrade Display port v1.4 to Display Port 1.2 on the monitor.

Then the display seems to work (albeit without HDR support or the ability to select different refresh rates).
lol, I just did that a couple hours after you post... works ok
 

Barclay-Mac

macrumors newbie
Dec 23, 2020
2
0
England, United Kingdom
lol, I just did that a couple hours after you post... works ok
Glad you have it working.

This issue has been a problem on my 5k display since I have owned it (around 12 months).

I can’t change the refresh rate or use HDR while running at the higher resolution.

I assume it’s an LG issue rather than Apple, but when the display is £1,500 I just want someone to fix it!!!
 

Captain Trips

macrumors 68000
Jun 13, 2020
1,860
6,355
Possible solution. Seems too easy to be true, maybe it is. This reddit forum has someone confirming m1 works with 5120x1140, but you have to hold down option key when selecting res to get more options.

https://www.reddit.com/r/mac/comments/jvwju9/_/gcrmzlm
I've got an m1 mac mini coming and in the market for a dell 49" super-wide U4919DW, but nervous to pull the trigger. Can anyone with a m1 and a 5120x1440 display confirm?
I do not have a monitor that can go to 5120 x 1140.

However, I do have a monitor that can go to 3440 x 1440, and when I hold down the Option key when clicking on the Scaled radio button (as described in the original post) I did see noticeably more resolution options.

My monitor is the AOC CU34G2X 34" QHD 144Hz HDMI DP FreeSync UltraWide Curved LED Gaming Monitor

Edit: Although I saw many more options when I held down the Option key when I clicked on the Scaling radio button, if I went back to Default for Display and then clicked on Scaling without holding down the Option key then I still saw the expanded resolution list (at least on the Intel Mac mini). But if I closed system Preferences then I was back to the shorter list of resolutions when I went back in and did not hold down the Option key when selecting Scaled.
 
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Captain Trips

macrumors 68000
Jun 13, 2020
1,860
6,355
OK, here are all the resolution options I have between clicking on the Scaling radio button and clicking on the Scaling button when holding down the Option key.

My monitor is the AOC CU34G2X 34" QHD 144Hz HDMI DP FreeSync UltraWide Curved LED Gaming Monitor

Mac info:
  • Late 2014 Mac mini: 4 GB memory, 512 GB SSD (upgrade), 1.4 GHz Dual-core Intel Core i5, Intel HD Graphics 5000 with 1536 MB, Thunderbolt 2 to DisplayPort cable for monitor. Maximum vertical frequency / refresh rate was 60 Hz for all resolutions.
  • 2020 MacBook Pro M1: 8 GB memory, 512 GB SSD, Thunderbolt 3 to DisplayPort cable for monitor. Maximum resolution / refresh rate was 144 Hz for all resolutions (maximum value per monitor specs)
Resolutions by Mac and whether or not I held down the Option key when I clicked on the Scaling radio button for Resolution in the Dispay section of System Preferences:
1608858386500.png
 
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zm15

macrumors member
Jul 2, 2015
31
3
OK, here are all the resolution options I have between clicking on the Scaling radio button and clicking on the Scaling button when holding down the Option key.

Mac info:
  • Late 2014 Mac mini: 4 GB memory, 512 GB SSD (upgrade), 1.4 GHz Dual-core Intel Core i5, Intel HD Graphics 5000 with 1536 MB, Thunderbolt 2 to DisplayPort cable for monitor. Maximum vertical frequency / refresh rate was 60 Hz for all resolutions.
  • 2020 MacBook Pro M1: 8 GB memory, 512 GB SSD, Thunderbolt 3 to DisplayPort cable for monitor. Maximum resolution / refresh rate was 144 Hz for all resolutions (maximum value per monitor specs)
Resolutions by Mac and whether or not I held down the Option key when I clicked on the Scaling radio button for Resolution in the Dispay section of System Preferences:
View attachment 1700652

What Monitor are you using?? This isn't the 49" LG is it?
 

Captain Trips

macrumors 68000
Jun 13, 2020
1,860
6,355
What Monitor are you using?? This isn't the 49" LG is it?
Ah. my apologies! I have made a fair amount of ultrawide / M1 posts recently and I forgot to mention the monitor in these posts.

I was wanting to give some more info on ultrawide monitor performance with M1 Macs, and so I added the posts above to help other people looking for an ultrawide option in general and to give feedback on the "hold the Option key when selecting Scaled" for the monitor resolution.

The monitor in question is an 'AOC CU34G2X 34" QHD 144Hz HDMI DP FreeSync UltraWide Curved LED Gaming Monitor' - sorry about the oversight. I will update my 2 posts above to make it clearer.
 
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