MacOS crash when certain applications render on external HiDPI screen. #2981
Replies: 3 comments 4 replies
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This does not seem to be a BetterDisplay related issue but a generic macOS one. Sadly macOS became somewhat unstable lately when dealing with external displays. Typical reasons for crashes include using accessibility zoom, sleep-wake etc. OpenGL was deprecated by Apple and apps using OpenGL may experience various issues as well. |
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Another affected program seems to be Moonlight: |
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Also experiencing this using a 4k monitor+BetterDisplay at 167% (i.e. nonstandard HiDPI) and getting hard crashes/kernel panic when using Moonlight. Only fix is to change HiDPI to 100%/200% (i.e. standard modes) Is there a process for reporting up to Apple, or should I just submit crash reports every time it happens and pray? |
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Yes, you can use Feedback Assistant or just generally allow crash reporting in macOS. Although Apple might not put any resources into fixing OpenGL as any modern apps should really be using Metal by now. |
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For Moonlight, enabling the VSync option in the settings fixed the crashing for me. I also did some testing, there seems to be a sort of "bandwidth" limit that, if exceeded, causes the crashing. In other words, if I don't enable the VSync option, I could instead either lower the configured refresh rate or resolution (of the Mac's monitor, not the stream) to avoid the crash. I don't imagine we'll get a writeup from Apple on this, if they even fix it, but it would be super interesting to see what is happening that causes the issue. Edit: I also tried setting the monitor resolution and refresh rate just below one that triggers the crash* and then resized the Moonlight window to exceed the monitor boundaries, still, it didn't crash. So it really appears to be tied to the monitor's output settings somehow. I did not test stuff like subsampling and color range settings though. *At least on my M2 Pro Mac Mini, it doesn't crash the system instantly. I figured out that if I press the key combination to quit the stream (Command+Control+Shift+Q) really quick once the screen starts glitching, it gracefully stops the stream without crashing, this enabled me to test settings more easily. |
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This fixed it, if anyone sees this in the future. Enable VSync in Moonlight settings and crashing stops.
Agree, would be cool to see the issue. I was doing a 4k 150mbps stream on a monitor with 240hz refresh rate, so maybe too much bandwidth as you mentioned. |
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@stvsu (I added some more details in an edit to my previous comment) I was able to max out the bandwidth to what the NVIDIA encoder allows (~760Mbit) and it still worked fine. While it behaves suspiciously similar to a bandwidth limit, it doesn't seem to care about what the stream is actually configured to, only the display output. |
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Certain applications (I'm guessing apps using OpenGL) are crashing my MacBook Pro M3 Max if the window is on a specific external monitor, but only if I've enabled HiDPI in BetterDisplay.
List of applications that have caused it so far:
The specific screen also has a custom EDID config to disable
YCbCr.Problem Details
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