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cubbie5150

macrumors 6502a
Mar 4, 2007
714
221
I never noticed other complaints of a problem I've had ever since Sequoia release (late 2021 M1 Pro 16-inch MBP):

When an episode of a podcast ended, and I had nothing selected to Play Next, my "Playing Next" queue would automatically self-populate, even with shows I don't follow; it wouldn't auto-play them, but the queue would populate). Weird... Anyway, so far, no such issue since I updated to 15.1 on day of release.
 

exmophie

macrumors member
Oct 23, 2019
30
169
I have my MacBook Pro 16" connected via HDMI to a 32" 4K 144 Hz monitor. After updating, I can't use the scaled resolution 3008x1692 (same as Pro Display XDR, so things look "normal" sized on macOS) with 144 Hz refresh rate or variable refresh rate, which was working (at least, I could set it and my monitor OSD showed 144 Hz) previously on Sequoia 15.0/15.0.1.


In MacOS 15.0.1, I had VRR 48-144hz on my 32" Gigabyte 4k HDR gaming monitor @ 3360x1890 & 3840x2160 connected over Thunderbolt 3.

After updating to 15.1, things are noticibly bad:

HDR, VRR & 144hz modes disappear at resolutions above 2560x1440
3008x1692 caps at 120hz fixed
3360x1890 caps at 98hz fixed

It's almost as if my non-Apple display connected over Thunderbolt 3 is somehow being constrained like a 4K display connected over HDMI 2.1.

I'm guessing it's a bug now where if it doesn't see it as an Apple Display or some other familiar device in a list somewhere it's defaulting the display connection profile down to assume it's 4K TV over HDMI.
 
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01cowherd

macrumors newbie
Sep 20, 2024
16
22
In MacOS 15.0.1, I had VRR 48-144hz on my 32" Gigabyte 4k HDR gaming monitor @ 3360x1890 & 3840x2160 connected over Thunderbolt 3.

After updating to 15.1, things are noticibly bad:

HDR, VRR & 144hz modes disappear at resolutions above 2560x1440
3008x1692 caps at 120hz fixed
3360x1890 caps at 98hz fixed
We might have the same monitor—Gigabyte M32U? Your comment reminded me I didn't test over USB-C. I get the same results as yours with my Thunderbolt cable. Interestingly, at 3360x1890, I get 100 Hz over HDMI 2.1 instead of 98 Hz over USB-C (using an Apple Thunderbolt 4 cable, so not a bandwidth issue). That said, I do still get 144 Hz VRR with HDR at 3840x2160 since it doesn't have to scale that up for HiDPI.

If you have an M32U, did you ever notice a blue highlight/shadow behind black-on-white text? I would occasionally get that on lines of text on the right half of my monitor, which I haven't noticed since updating. If that's resolved, then this is an acceptable trade-off for me, because 120 Hz vs 144 Hz isn't huge and I don't enable the HDR on this monitor. But it's only been a couple days so I'm not counting on it.
 
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exmophie

macrumors member
Oct 23, 2019
30
169
We might have the same monitor—Gigabyte M32U? Your comment reminded me I didn't test over USB-C. I get the same results as yours with my Thunderbolt cable. Interestingly, at 3360x1890, I get 100 Hz over HDMI 2.1 instead of 98 Hz over USB-C (using an Apple Thunderbolt 4 cable, so not a bandwidth issue). That said, I do still get 144 Hz VRR with HDR at 3840x2160 since it doesn't have to scale that up for HiDPI.

If you have an M32U, did you ever notice a blue highlight/shadow behind black-on-white text? I would occasionally get that on lines of text on the right half of my monitor, which I haven't noticed since updating. If that's resolved, then this is an acceptable trade-off for me, because 120 Hz vs 144 Hz isn't huge and I don't enable the HDR on this monitor. But it's only been a couple days so I'm not counting on it.
Yup, Gigabyte M32U. No blue highlight/shadows on text though. I've experienced that on some ASUS 4K screens over HDMI that are trying to register as 10-bit color using 8-bit + dithering.
 
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