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

[Markus Steinko]

Hi there,

thanks a lot.

Solved with installing xdg-desktop-portal-gnome and 
xdg-desktop-portal-gtk from sid.

Applications start smooth and the dark mode is back...

Before upgrading those two packages the bug appeared while using both 
mentioned sessions with having the nvidia-driver package installed...

Thanks again and best regards,


Am 16.02.25 um 23:30 schrieb 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