[Webkit-unassigned] [Bug 260446] [GTK] Animations/Motion are broken with Lower Power Mode

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Sep 11 16:57:49 PDT 2023


--- Comment #7 from Michael Catanzaro <mcatanzaro at redhat.com> ---
Anyway, I can reproduce by manually enabling low power mode. It immediately breaks rendering, and the effect is permanent: disabling low power mode does not fix it, only a cross-site navigation to trigger a process swap seems sufficient to get the web view to work again.

It's not just a problem with animations or scrolling. For example, selecting text in the text entries on this Bugzilla does not work. However, I can load new pages and they initially render just fine. But all subsequent rendering is broken.

It seems LowPowerModeNotifier is only used by Page::handleLowModePowerChange (which is a typo, should be Page::handleLowPowerModeChange), so whatever is going wrong must be caused by that. Most notably, it sets a throttling reason ThrottlingReason::LowPowerMode and calls RenderingUpdateScheduler::adjustRenderingUpdateFrequency.

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