debcrafters-packages team mailing list archive

[Shuhao <2107245@xxxxxxxxxxxxxxxxxx>]

I can also confirm that patching with
https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/8459 at least fixes
the performance issue. However, resizing windows remains quite glitchy
as seen in the video.

Building your own version is pretty simple. Enable deb-src in your apt
repository, then the following commands:

apt-get source gtk4
apt-get build-dep gtk4
cd gtk4-4.18.4+ds
wget https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/8459.patch
patch -p1 < 8459.patch
dpkg-buildpackage -rfakeroot -uc -b
sudo dpkg -i *.deb

** Attachment added: "Screencast From 2025-06-08 14-44-22.webm"
   https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2107245/+attachment/5882888/+files/Screencast%20From%202025-06-08%2014-44-22.webm

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to gtk4 in Ubuntu.
https://bugs.launchpad.net/bugs/2107245

Title:
  Resizing XWayland & X11 windows is extremely slow

Status in GTK+:
  Fix Released
Status in Mutter:
  New
Status in gtk4 package in Ubuntu:
  Fix Released
Status in mutter package in Ubuntu:
  Opinion
Status in gtk4 source package in Plucky:
  In Progress
Status in mutter source package in Plucky:
  Won't Fix
Status in gtk4 source package in Questing:
  Fix Released
Status in mutter source package in Questing:
  Opinion

Bug description:
  [ Impact ]

  When resizing X11 windows that use server-size-decorations on Xorg or
  through XWayland (Discord, Spotify, etc) the resize does not take
  effect until seconds after holding the resize. If you let go of the
  resize before it happens then window does not resize at all.

  [ Test Plan A ]

  1. Enable fractional scaling and set a scaling factor of 125% or 150%
  2. Log into an Ubuntu Desktop Wayland session
  3. Start Spotify
  4. Try to resize the window
  5. Verify that the window can be resized normally

  [ Test Plan B ]

  1. Enable fractional scaling and set a scaling factor of 125% or 150%
  2. Log into an Ubuntu Desktop Xorg session
  3. Start Spotify
  4. Try to resize the window
  5. Verify that the window can be resized normally

  [ Where problems could occur ]

  This update is included in the 4.18.5 bugfix release from upstream.
  See bug 2109964

  [ Other info ]

  The issue was originally reported on NVIDIA hardware:
  """
  Ubuntu 25.04 Beta
  NVIDIA RTX 5090 (570.133.07)
  """
  but it can be reproduced on any graphics driver.

To manage notifications about this bug go to:
https://bugs.launchpad.net/gtk/+bug/2107245/+subscriptions