Bug#1096033: libgtk-4-1: first startup of programs depending on libgtk-4-1 4.17.4+ds-4 very slow, often lagging minutes

[msp]

Hi Simon,

thanks, yes, this is the solution! -- double-yes, actually.
Some details below:

On Sun, Feb 16, 2025 at 07:02:53PM +0000, Simon McVittie wrote:
> On Sat, 15 Feb 2025 at 14:59:52 +0100, msp wrote:
> > When libgtk-4-1:amd64 is installed in version 4.17.4+ds-4, starting any
> > programs depending on this package takes unusually long (up to minutes),
> > sometimes causing the program to be unusable.
> 
> On Sun, 16 Feb 2025 at 19:41:37 +0100, Markus Steinko wrote:
> > I am facing the same bug on a Debian testing system, running Gnome.
> > 
> > Many applications are just reacting very slow. Like gnome-terminal,
> > gnome-settings, gnome-tweaks and the extension-manager.
>
> Are you perhaps both using the "GNOME on Xorg" session mode, instead of
> the default "GNOME" session which is GNOME in Wayland mode?

yes indeed, I use X11 (configured by setting WaylandEnable=false in
/etc/gdm3/daemon.conf - because 'barrier' misbehaved last time I tried).
Anyway: switching to wayland somewhat improves the situation, but not fully:
  The first (gtk/gnome?) program starting takes "ages" (30 s?) to
start, other programs started successively do so in normal time.  
I tried this with gnome-terminal and, alternatively, libreoffice
(however, I did not switch off signal auto-starting).
  This was before I did the upgrade suggested below (and confirmed by
downgrading again to make sure).

> Please try with xdg-desktop-gnome 47.2-2, which I recently uploaded to
> unstable. That fixes an initialization problem with GTK 4.17.x which can
> cause this symptom (#1096094).

Yes, upgrading xdg-desktop-portal-gnome (I guess you meant that) and
xdg-desktop-portal-gtk to 1.15.2-2 fully resolves the problem, both
with x11 and with wayland. 

I can confirm that tbe behaviour was exactly as described in #1096094
(closing every instance and re-opening), although I did not iterate
through all combinations (x11/wayland, closing all instances, ...)

Thank you once more for having resolved this!
  best,
   msp


> If that doesn't resolve the problem, please check the system log (systemd
> Journal) for any error messages or crashes that appear there when you
> log in, start one of the slow applications, and wait for it to start.
> 
> Relevant documentation:
> https://manpages.debian.org/testing/systemd/journalctl.1.en.html
> 
> > Also some are loosing their dark-mode and turn back to light mode
> 
> This is a less severe symptom than extremely slow startup, and might
> not be closely related. If updating packages does not resolve that,
> please report it as a separate bug, with details of some affected apps
> and any error messages that appear in the systemd Journal.
> 
>     smcv

-- 
Martin Meyerspeer <m.msp at mailbox.org>
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