Bug#889706: gnome-shell: Gnome on Wayland causes GUI to freeze every ~1.5 seconds

[Simon McVittie]

Control: reassign -1 gnome-shell-extension-system-monitor
Control: tags -1 + moreinfo

On Fri, 04 May 2018 at 17:24:14 +0200, Peter Bašista wrote:
> It turns out that the issue was in the following GNOME Shell extension:
> 
> [1]https://extensions.gnome.org/extension/120/system-monitor/

This is packaged in Debian. Please check whether the packaged version has
the same issue (I suspect it will).

> This extension is probably blocking the main drawing or execution thread (if
> there is such a thing in GNOME Shell) which then causes the entire GUI to
> regularly freeze for a moment.

That sounds plausible. There is no sandboxing (either for privileges
or performance) between GNOME Shell and its extensions; this makes the
extensions powerful and able to do arbitrary things, but also means that
if an extension misbehaves, there is nothing the Shell can do about it.
This arrangement cannot be changed without breaking existing extensions.

    smcv