".ico" icon files are shown as random noise

[Damiön la Bagh]

Steps to reproduce
Create an .ico file (for using the same icon between multiple platforms)
create a desktop file linking to the ico file.

here is an example of the one that doesn't work

[Desktop Entry]
Type=Application
Version=0.9.4
Name=ChromisPos
Comment=Chromis Point of Sale
Icon=/opt/chromispos/pos.ico
Exec=/opt/chromispos/start.sh
Terminal=false
Path=/opt/chromispos

gnome-shell (possibly dashtodock) displays this icon as a wash of noise. (see screenshot)

In 16.04 the .ico works fine, and switching to Unity desktop also shows the .ico just fine.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.28.2-0ubuntu0.18.04.1
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 16 00:29:47 2018
DisplayManager: lightdm
GsettingsChanges:
 b'org.gnome.shell' b'favorite-apps' redacted by apport
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
InstallationDate: Installed on 2015-11-15 (1004 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to bionic on 2018-08-15 (0 days ago)

[Damiön la Bagh (kat-amsterdam)]

Here is a screenshot of the icon in gnome-hell

[Damiön la Bagh (kat-amsterdam)]

And here is the actual .ico file

[Damiön la Bagh (kat-amsterdam)]

And interestingly enough. Nautilus also displays the preview of the file as noise.

[Damiön la Bagh (kat-amsterdam)]

Here is a PNG of the icon so you can see what it looks like if you are also on 18.04 with this bug.

I used icotool -x pos.ico
to extract the icons from the .ico file as PNGs

[Daniel van Vugt (vanvugt)]

If nautilus also shows noise then this is a lower level bug, not in gnome-shell. Reassigning to GTK to start with...

[Daniel van Vugt (vanvugt)]

I'm not sure what the right component to assign this bug is. To progress this issue please open a bug with the GTK developers here:

https://gitlab.gnome.org/GNOME/gtk/issues

and the let us know the new bug ID.

[Damiön la Bagh (kat-amsterdam)]

Here is the Upstream Bug report

https://gitlab.gnome.org/GNOME/gtk/issues/1279

side note: When will Launchpad be updated with rich images and header templates like the gitlab bug tracker?

[Damiön la Bagh (kat-amsterdam)]

Upstream moved the bug to gtk-pixbuf as they knew of some problems with ico's in gdk-pixbuf

https://gitlab.gnome.org/GNOME/gdk-pixbuf/issues/86