Previous versions of Gnome worked great for me, but with the latest Manjaro updates to Gnome 40, entering, leaving, or interacting with any gnome-shell functions in the Activities overview (change desktop, launch application, search, etc.) freezes the screen for 20-30 seconds. Running a system monitor shows one of the two cores pegs at 100% during the delay; mem usage is flat. Nothing from X or gnome-shell in system log.
Activating & using the dock, in or out of the overview, is fine. Changing desktops with keyboard is ok; switching via mouse while in overview mode triggers the problem. Even hovering the mouse over the app thumbnails incurs a long delay before the decorations appear.
Google search so far turns up nothing, so it seems this is peculiar to my system (Dual Pentium @ 1.8GHz, 8Gb). Is the new Gnome shell normally that cpu-bound?
I’m working around it by just avoiding the overview, but absentmindedly hitting the hot corner or the Windows key is a right pain.
gsettings set org.gnome.shell disable-user-extensions true
then logged out/in. No joy.
It definitely worked, because, with the extensions disabled, the dock was only active through the “Activities” label in the top bar. Once re-enabled, it started responding to the mouse & window focus again.
Just updating to say that today’s stable release seems to have largely resolved the issue. Memory use (as reported by gnome-system-monitor) is down by about half (~50% vs. 100% of 4Gb) and the overview is usable, with just a second or two lag. I can’t say if the improvement is due to Gnome 41 or simply from being stingier with memory. Memory use does jump up when I activate the overview, but it only peaks for a few seconds.
PS: Thanks so much to everyone who contributed to this!