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From one of the links[0]: > I have two M1 macbook airs, both have this issue. It's only present when macOS resumes after running out of battery. Restarting fix

From one of the links[0]: > I have two M1 macbook airs, both have this issue. It's only present when macOS resumes after running out of battery. Restarting fixes it, but that's a pain and defeats the whole point of the low battery resume feature. > Interestingly the cursor isn't the only thing that's slow. I maintain an old OpenGL codebase and rendering performance is degraded until I restart. I've optimized for the M1 so it's definitely not a rosetta issue. It's almost like the gpu gets stuck in a low power mode after shutting down due to low battery. I can attest to this - also with an M1 Air. When macOS resumes from 0% battery, it's stuck in 30Hz mode. Not just the cursor - everything. I've always restarted to fix. [0] https://www.reddit.com/r/mac/comments/qj77mq/cursor_lag_continues_on_monterey_m1/ https://www.reddit.com/r/mac/comments/qj77mq/cursor_lag_cont...

throwawayninja 5y ago
> When macOS resumes from 0% battery, it's stuck in 30Hz mode This sounds like detailed, testable data; I wonder how much effort it is to query this in code at resume just to confirm?
- herpderperator 5y ago
  iStat Menus will tell you the current "Frames Per Second", which is where I recall seeing it cap at 30Hz no matter what interaction I tried, after the 0% resume event. You have to basically scroll or do something that is supposed to be smooth to force the GPU to work as fast as it can, then immediately check the "Frames Per Second" in the iStat Menus toolbar. The "Frames Per Second" wouldn't display a number past 30Hz, whereas right now in the non-buggy state I can easily make it show 60Hz by scrolling in HN and clicking the iStat Menus toolbar immediately. It's been a while since I let my M1 Air fall to 0% but I am almost certain that's how I confirmed it.
  - tra3 5y ago
    I can't find "Frames per second" in iStat. I checked CPU/GPU section. Where is it?
    - herpderperator 5y ago
      https://www.dropbox.com/s/yra26nhu9dzsrch/Screen%20Shot%202022-02-17%20at%201.25.30%20PM.png?dl=0 https://www.dropbox.com/s/yra26nhu9dzsrch/Screen%20Shot%2020...
      - tra3 5y ago
        Thanks!
_9omd 5y ago
Oh wow, great to see this info. I've had the choppy mouse a couple times on my M1 Air, but it was always when I was super tired, and I had assumed it was just me. Good to know that I'm not crazy and there's a workaround for the time being. Hopefully Apple can get this fixed soon.

throwawayninja 5y ago

> When macOS resumes from 0% battery, it's stuck in 30Hz mode This sounds like detailed, testable data; I wonder how much effort it is to query this in code at resume just to confirm?

herpderperator 5y ago
iStat Menus will tell you the current "Frames Per Second", which is where I recall seeing it cap at 30Hz no matter what interaction I tried, after the 0% resume event. You have to basically scroll or do something that is supposed to be smooth to force the GPU to work as fast as it can, then immediately check the "Frames Per Second" in the iStat Menus toolbar. The "Frames Per Second" wouldn't display a number past 30Hz, whereas right now in the non-buggy state I can easily make it show 60Hz by scrolling in HN and clicking the iStat Menus toolbar immediately. It's been a while since I let my M1 Air fall to 0% but I am almost certain that's how I confirmed it.
- tra3 5y ago
  I can't find "Frames per second" in iStat. I checked CPU/GPU section. Where is it?
  - herpderperator 5y ago
    https://www.dropbox.com/s/yra26nhu9dzsrch/Screen%20Shot%202022-02-17%20at%201.25.30%20PM.png?dl=0 https://www.dropbox.com/s/yra26nhu9dzsrch/Screen%20Shot%2020...
    - tra3 5y ago
      Thanks!

_9omd 5y ago

Oh wow, great to see this info. I've had the choppy mouse a couple times on my M1 Air, but it was always when I was super tired, and I had assumed it was just me. Good to know that I'm not crazy and there's a workaround for the time being. Hopefully Apple can get this fixed soon.