AMD GPU on Mac slows down the work

• Oct 17, 2020 - 04:42
Reported version
3.5
Type
Performance
Frequency
Once
Severity
S3 - Major
Reproducibility
Always
Status
active
Regression
No
Workaround
No
Project

I have a 2019 MacBook Pro 16' with a 5500M 8G GPU, when I run MuseScore (in macOS Catalina), the system switch to the AMD GPU automatically. When I'm typing notes, the playback of one note can last up to 10 seconds, MuseScore is frozen in this period. This happens on all the notes I type every time, I have to restart MIDI engine to relieve it, but that don't last long, it become slow in tens of seconds. I have to run this command "sudo -S pmset -a GPUSwitch 0" in Terminal to force all the apps in the system only use Intel GPU. Once MuseScore is not using the AMD GPU, this issue doesn't happen any more.
I hope you can fix the compatibility with 5500M (or all AMD GPUs?) or just put an option in settings to disable the discrete GPU.
I tried a lot of versions of MuseScore 3, also reinstalled the system, even macOS Big Sur beta. I didn't try that in Windows.


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