Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

smcleod.net

Post reply on HN
Print view View original

121–130 of 180 posts

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#121

Post by jwong_ »

nuker wrote: post #7

Send it to Tim Cook email. It worked for me fixing DisplayPort DSC bug. After Catalina, later MacOSes lost ability to drive monitors at higher than 60Hz refresh. Apple support tortured me with all kinds of diagnostics, with WontFix few weeks later. Wrote email and it got fixed in Sonoma :) https://egpu.io/forums/mac-setup/4k144hz-no-longer-available...

I just upgraded from an M1 Pro to an m5 pro and lost the ability to drive my 4k monitor above 60hz on same dock and monitor setup.

This was also going from Sequoia to Tahoe.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#122

Post by sph »

smcleod wrote: post #64
nuker wrote: post #7

Send it to Tim Cook email. It worked for me fixing DisplayPort DSC bug. After Catalina, later MacOSes lost ability to drive monitors at higher than 60Hz refresh. Apple support tortured me with all kinds of diagnostics, with WontFix few weeks later. Wrote email and it got fixed in Sonoma :) https://egpu.io/forums/mac-setup/4k144hz-no-longer-available...

I don't expect emails to get through to busy CEOs of huge companies like Apple unless you're really lucky and they make it through some automation, but I have dropped him an email just in case. I guess you never know.

Has anyone tried sending an email to Nadella telling him that Windows is terrible now?

What if that was all it took.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#123

Post by eckelhesten »

semi-extrinsic wrote: post #116
skullone wrote: post #3

I thought I was going crazy when my new m4 seemed "fuzzier" on my external 4ks. I tried replicating settings from my old MacBook to no avail. I wonder if Apple is doing this on purpose except for their own displays.

I don't understand what is fuzzy about "lodpi". I've been using it for 8 years on a 4k 43" screen with 1x scaling. Can't say I noticed any difference when switching several times per day between Linux and an M1 MBP, nor any difference when upgrading to an M4 MBP.

That's because 4k on a 43 inch TV is lodpi

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#124

Post by MikeNotThePope »

krackers wrote: post #70
MikeNotThePope wrote: post #66

Earlier quoted context omitted.

He has an army of people that would read his emails. A truly important one should get read. You could always try calling, too! I cold called Marc Benioff at Salesforce and he actually picked up the phone.

This needs a story. What did you say to him?

This was maybe 20 years ago. I was looking for a job as a recruiter and just called him. He referred me to an HR rep and I did get an interview from it. Didn’t get the job, but hey, I got a shot!

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#125

Post by ErneX »

whatever1 wrote: post #13

How did none of the Apple devs notice this? 4k 32" inch is the industry standard for HiDPI monitors.

I don’t think 4K at 32 inch can be considered high dpi. Not even at 27 inch.

5K at 27 inch or 6K at 32 inch would though, specially on a Mac.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#126

Post by _diyar »

smcleod wrote: post #64
nuker wrote: post #7

Send it to Tim Cook email. It worked for me fixing DisplayPort DSC bug. After Catalina, later MacOSes lost ability to drive monitors at higher than 60Hz refresh. Apple support tortured me with all kinds of diagnostics, with WontFix few weeks later. Wrote email and it got fixed in Sonoma :) https://egpu.io/forums/mac-setup/4k144hz-no-longer-available...

I don't expect emails to get through to busy CEOs of huge companies like Apple unless you're really lucky and they make it through some automation, but I have dropped him an email just in case. I guess you never know.

I once had a terrible experience dealing with my local Apple Store and then a hostile call with an Apple Retail manager after I left critical feedback.

I emailed Cook, mostly just to shout into the void. Within a week I got a call from Apple Corporate, they gave me an appointment the next day and my hardware issue was suddenly solved over-night.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#127

Post by polyterative »

mkl wrote: post #91
compounding_it wrote: post #35

The ideal work/coding resolutions and sizes for macOS that I would suggest if you are going down this rabbit hole. 24 inch 1080p 24 inch 4k (2x scaling) 27 inch 1440p 27 inch 5k (2x scaling) 32 inch 6k (2x scaling) Other sizes are going to either look bizarre or you’ll have to deal with fractional scaling. Given that 4k is common in 27/32 inches and those are cheap displays these kinds of problems are expected. I hav…

27" 4k is totally fine on Windows 11 (not a gamer). Everything is sharp at 150% scale.

Windows does ha not have this issue.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#128

Post by raihansaputra »

brigade wrote: post #120
whatever1 wrote: post #117

Earlier quoted context omitted.

Apple does that for MacBook Airs as well since their monitor resolution is not ideal for integer scaling.

Apple never supersamples by 2x. Default MacBook Air scaling was around 1.1x iirc.

It’s actually around 1.5x for the default resolution out of the box and 1.3x for “more space” setting on m1/m2 MacBook Air. 1.1x supersampling on Macs makes it worse because down sampling to pixel alignment becomes a hot mess.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#129

Post by saagarjha »

compounding_it wrote: post #31
keyle wrote: post #26

This is the sort of Apple gotchas that really upset me. They've got a good thing going, but they keep finding ways to alienate people.

Their suggestion : get an Apple monitor that we just launched.

I don't think that one supports this use.

Re: New Apple Silicon M4 and M5 HiDPI Limitation on 4K External Displays

#130

Post by tgma »

LarsAlereon wrote: post #99
tgma wrote: post #89

This might be a dumb question: Is the author looking to run 4k display at HiDPI 8k framebuffer and then downscale? What's the advantage of doing so versus direct 4k low-DPI? Some sort of "free" antialiasing?

From what I understand, the main goal is to fix the problem that non-native (1:1 pixel mapping) resolutions and scaling look worse than native. This is a problem when you ship high-dpi displays that need UI scaling in order for things to be readable. Apple's solution was to render everything at a higher, non-native resolution so that images were always downscaled to fit the display. So to oversimplify, Windows can ha…

> From what I understand, the main goal is to fix the problem that non-native (1:1 pixel mapping) resolutions and scaling look worse than native.

That would be my instinct as well, but the author seems to be delibarately doing the exact opposite. Trying to force a 2x HiDPI and then downscaling to native display resolution whereas he could have just done a 1:1 LoDPI rendering. What you get in the end is some equivalent of hack/brute-force smoothing/antialiasing of what was rendered in the downsample.

Post reply on HN