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fix(desktop): stop pinning macOS displays at max refresh rate (#1242)

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The macOS compositor watchdog called webContents.setBackgroundThrottling(false)
unconditionally for the window's whole lifetime. That disables Chromium's idle
frame-rate throttling, so the GPU process's CADisplayLink never idles — pinning
ProMotion panels at their maximum refresh rate (120Hz) continuously, even while
the app is idle or occluded, which drains the battery.

The call was never needed: the probe already skips non-producing windows via its
screen-lock / isVisible / isMinimized / document.visibilityState guards, and the
freeze it targets happens while the window is visible and focused, where
background throttling never applies. Removing it lets the compositor idle and the
display drop to a low adaptive rate when nothing animates; freeze detection is
unaffected. A comment and a docs note keep it from being re-added.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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fireblue
2026-06-01 11:42:22 +08:00
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parent eb7495d231
commit 3095bcb760
2 changed files with 15 additions and 2 deletions
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docs/development.md
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@@ -123,6 +123,12 @@ GPU process so Chromium rebuilds the display link. The probe is skipped while
the screen is locked or the window is hidden or minimized, since a window
legitimately stops producing frames then.
The watchdog deliberately leaves background throttling **enabled**. Calling
`webContents.setBackgroundThrottling(false)` would keep the compositor producing
frames non-stop, pinning ProMotion displays at 120Hz forever and draining the
battery while the app is idle — so do not re-add it. The probe's visibility
guards already prevent throttling from causing a false stall.
### Daemon logs
Check `$PASEO_HOME/daemon.log` for daemon logs. The default level is `info`; set