Yeah, and I'm getting problems with rebooting and losing the display/mouse pointer etc. I think I'll give up on this malarkey and hope I can find another solutionRight, with virtual screen mirroring you can go even beyond even 3840px HiDPI limit (just turn on 'Enable resolutions over 8K...' under Settings/Displays/Overview/Additional settings...). However this is more of a workaround instead of a full-fledged solution to the problem.
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5K2K at 120Hz with Mac Mini M4
- Thread starter Newgoblin49
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It would be helpful to see to get those info from somebody who has it working on a base mini.
Spoke to Apple Support who agreed that at least for the MacBook M4 Max this should be working. They're escallating and calling back Monday so let's see.
@MxDaviD !
Please read this post. This will tell us why it’s working for you . He is the creator of Betterdisplay
Hello,
15.1 and 15.2 beta both work.
Yes it is the only display connected.
USB C and thunderbolt 4
Time machine restored backup
Here you go!
15.1 and 15.2 beta both work.
Yes it is the only display connected.
USB C and thunderbolt 4
Time machine restored backup
Here you go!
Sir David Grasic you’re truly the best , I tip my hat to you kind sir!Hello,
15.1 and 15.2 beta both work.
Yes it is the only display connected.
USB C and thunderbolt 4
Time machine restored backup
Here you go!
@waydabber what do you make of this?
Hmm. We might be onto something. What I find super interesting from the mode list attached by @MxDaviD is that modes beyond the 3072px HiDPI limit are only available at 120Hz (fixed and VRR) refresh rate but not at 60Hz. This is actually rather counter-intuitive. So for example `3840x1620 HiDPI 120Hz` is available, but `3840x1620 60Hz` is not. This is not the case for resolutions below 3008x1269 HiDPI where these resolutions are available for all refresh rate variants.
@rojharris's display does not support 120Hz at all, so actually there is no direct comparison between the to, or rather there is full agreement in that neither of them have any 3072px+ HiDPI resolutions available at 60Hz.
@MxDaviD - what happens if you try to switch to 60Hz?
@rojharris's display does not support 120Hz at all, so actually there is no direct comparison between the to, or rather there is full agreement in that neither of them have any 3072px+ HiDPI resolutions available at 60Hz.
@MxDaviD - what happens if you try to switch to 60Hz?
Held off on the M4 because of this issue so I have no M4 hardware to test with but I do have a couple data points on the off chance they are useful:
1. I had a glitch today with my current M1 Air + Dell 6K setup after a reboot. macOS would only give me a low resolution at 30fps. I had to cycle monitor power, replug the cable, and reboot the mac to get back to normal. Clearly autodetection can be iffy even on well-supported hardware.
2. dosdude did a video about upgrading storage, and mentioned that the DFU/recovery port is the middle TB jack on the new mini. If that port is special in one way, it may be special in others. https://support.apple.com/en-us/120694
1. I had a glitch today with my current M1 Air + Dell 6K setup after a reboot. macOS would only give me a low resolution at 30fps. I had to cycle monitor power, replug the cable, and reboot the mac to get back to normal. Clearly autodetection can be iffy even on well-supported hardware.
2. dosdude did a video about upgrading storage, and mentioned that the DFU/recovery port is the middle TB jack on the new mini. If that port is special in one way, it may be special in others. https://support.apple.com/en-us/120694
I do not have that option. Only VRR (48-120HZ) or 120.Hmm. We might be onto something. What I find super interesting from the mode list attached by @MxDaviD is that modes beyond the 3072px HiDPI limit are only available at 120Hz (fixed and VRR) refresh rate but not at 60Hz. This is actually rather counter-intuitive. So for example `3840x1620 HiDPI 120Hz` is available, but `3840x1620 60Hz` is not. This is not the case for resolutions below 3008x1269 HiDPI where these resolutions are available for all refresh rate variants.
@rojharris's display does not support 120Hz at all, so actually there is no direct comparison between the to, or rather there is full agreement in that neither of them have any 3072px+ HiDPI resolutions available at 60Hz.
@MxDaviD - what happens if you try to switch to 60Hz?
Indeed, thought so. But all this feels more like an inconsistency/bug in the code that propagates display modes, not something intentional - why limit something at 60Hz and allow at 120Hz? Makes no sense at all, there was no precedent for anything like this in the past (only the other way around).
Do you see any relation between this and the LG’s not supporting that hidpi resolution because I’m struggling to see it
Yes, it looks like LG monitor supports only 60/75 at 3840x1620, and the M4 currently supports only 120HZ at 3840x1620. Usually I should have an option to have 3840x1620 at 60hz like I did on the M2 Pro. So because te LG can not run at 120HZ, there is no option to select 3840x1620.
Just shooting in the dark as I don't have a Mac, but use the U4025QW with Windows. Has it got anything to do with DSC? U4025QW doesn't need DSC to achieve 60Hz, but needs DSC to get 120 Hz and with it comes the 3840x1620 HiDpi support?
Got you ,
So I looked it up , your monitor is the only one which has 5K2K at 120Hz at the moment. Theres absolutely no other monitor at that configuration at the moment
Now this makes more sense , why your M4 Max isn’t supporting that monitor. When it clearly should.
Looks like we’ve cracked this @waydabber
I've also raised an issue with support & should get a call back tomorrow. Hopefully if enough people are annoying enough, they'll fix the (presumed) bug
Sorry if this muddies the water but on my MBP M1 Max with the 40"LG, and using SwitchResX, in 3840 x 1620 in HiDPI I can choose 30, 50, or 72 Hz but not 60. It's not there in the list of choices for whatever reason. Obviously I use 72 so the lack of 60 doesn't bother me.
Weird, I don't see that option for HiDPI in SwitchResX
I've got the LG 40WP95C, connected with DisplayPort (but Thunderbolt seems to have the same issue).
Got my new MM M4Pro today! Just setting it up now with the new Dell U4025QW.
It was default set to 2560x1080, and I wondered why everything looked pretty big. I went to the resolution list and picked the top one, 5120x2160, and everything went teeny tiny, haha, so now I understand why you guys are choosing lower resolutions. I'm used to my old 30" ACD at 2560x1600, and this is the first new monitor I've had since 2009.
Just for information, it's reporting as 5120x2160 (Ultra-wide 5K) under resolution.
UI Looks like says 5120x2160 @ 120.00Hz.
It also says Metal Support is Metal 3.
I'm connected with the Thunderbolt 4 cable that came with the monitor.
Super smooth and no issues.
Switching to 3840x1620 makes the resolution report as 7680x3240, with UI Looks like report 3840x1620 @ 120.00Hz.
Still smooth and sharp. It's like a wider version of my old 30" ACD, so I will probably stick with this setting.
Chalk up another success story for the Dell U4025QW on a MM M4P.
It was default set to 2560x1080, and I wondered why everything looked pretty big. I went to the resolution list and picked the top one, 5120x2160, and everything went teeny tiny, haha, so now I understand why you guys are choosing lower resolutions. I'm used to my old 30" ACD at 2560x1600, and this is the first new monitor I've had since 2009.
Just for information, it's reporting as 5120x2160 (Ultra-wide 5K) under resolution.
UI Looks like says 5120x2160 @ 120.00Hz.
It also says Metal Support is Metal 3.
I'm connected with the Thunderbolt 4 cable that came with the monitor.
Super smooth and no issues.
Switching to 3840x1620 makes the resolution report as 7680x3240, with UI Looks like report 3840x1620 @ 120.00Hz.
Still smooth and sharp. It's like a wider version of my old 30" ACD, so I will probably stick with this setting.
Chalk up another success story for the Dell U4025QW on a MM M4P.
What’s your device ?I've also raised an issue with support & should get a call back tomorrow. Hopefully if enough people are annoying enough, they'll fix the (presumed) bug
Interesting. Looking at this:
There is a new `MaxSrcRectWidthForPipe` property for the framebuffer ports' `IOMFBMaxSrcPixels` on my entry level M4 mini which was not there in previous generations. Its values apparently contain max limits "for pipe" (whatever that means) in an array. These seem to coincide nicely with the 3072px and 3840px HiDPI limits we experience (not sure about the 3360px some had) and the limits match the specs page of the mini. The old `MaxSrcRectWidth` is still there which in previous generations was an exact indicator of the scaled resolution limit, but it is now always set to 7680.
Maybe this is somehow used to determine the scaled resolution for various display configurations in a more complicated manner than on previous generations.
Code:
ioreg -lt | grep IOMFBMaxSrcPixelsThere is a new `MaxSrcRectWidthForPipe` property for the framebuffer ports' `IOMFBMaxSrcPixels` on my entry level M4 mini which was not there in previous generations. Its values apparently contain max limits "for pipe" (whatever that means) in an array. These seem to coincide nicely with the 3072px and 3840px HiDPI limits we experience (not sure about the 3360px some had) and the limits match the specs page of the mini. The old `MaxSrcRectWidth` is still there which in previous generations was an exact indicator of the scaled resolution limit, but it is now always set to 7680.
Maybe this is somehow used to determine the scaled resolution for various display configurations in a more complicated manner than on previous generations.