Bug 99225

Summary:	Fedora 25: Wayland causes gnome-shell's CPU usage to increase, and spike when moving the cursor
Product:	Wayland	Reporter:	Nate Graham <nate>
Component:	wayland	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED INVALID	QA Contact:
Severity:	normal
Priority:	medium	CC:	mcatanzaro, nate
Version:	1.5.0
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Nate Graham 2016-12-29 18:46:40 UTC

I'm running Fedora 25 + GNOME 3.22 + Wayland on a 2016 HP Spectre x360 (Kaby Lake).

With X, gnome-shell usually idles at 0-22% of one processor core and using the trackpad barely increases this, if at all.

With Wayland, gnome-shell usually idles at 0-8% of one processor core and when I use the trackpad, gnome-shell immediately spikes in CPU and memory usage. Screen recording attached.

Note: the screen recording exacerbates the problem to a huge extent; when I'm *not* recording, drawing circles with the trackpad spikes gnome-shell to about 30-40% of one processor core, and gnome-shell idles at 0-8%. When screen recording, these increase to not 250% and 50%, respectively. But still, 30-40% of one processor core seems very high for just moving the cursor around.

This seems to be a Wayland issue since it entirely disappears when logging into an X session. I'm happy to collect any required information.

Comment 1 Michael Catanzaro 2017-01-07 19:04:14 UTC

Hi, this is the bug tracker for Wayland protocol issues. Nobody is going to fix your issue here. I recommend reporting this issue on GNOME Bugzilla against the gnome-shell component.

Comment 2 Nate Graham 2017-01-07 19:49:05 UTC

Not being sure whose issue it was, I already did that: https://bugzilla.gnome.org/show_bug.cgi?id=775162

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.