GIMP icon sizes small on large and huge setting

Bug #1817389 reported by Talib Pierson on 2019-02-23
This bug affects 6 people
Affects Status Importance Assigned to Milestone
gimp (Ubuntu)

Bug Description

Increasing the icon size setting increases the size on some UI elements, while decreasing the size of others. Sizes appear to increase up to a point, but once that point is reached, the size reverts to small. This occurs at large for most elements, but some get larger and revert at huge instead.

$ gimp
click: Edit -> Preferences -> Icon theme (under Interface section) -> Custom icon size (drop-down menu)
then the toolbar icons of "Large" and "Huge" settings on the icon size slider are smaller than "Medium", being the same size as "Small" instead.

Where I've reproduced it:
Short: gimp 2.10.6 and 2.10.8 on Ubuntu 18.10 and Ubuntu 19.
Long: I've reproduced it in an Ubuntu 18.10 fresh install and a qemu-kvm virtual machine. I've reproduced the problem in gimp 2.10.8 (apt) on Ubuntu 19 (development branch), so it doesn't look like it is fixed in newer versions.

Where I couldn't reproduce it:
When I tried to replicate it on Ubuntu 19 (development branch) with the flatpak from the gimp website, the bug did not occur. Same for 18.10. Gimp version must also be new enough to have icon size setting.

I've reported it on but thought that this bug would benefit from the attention of the Ubuntu Community/Canonical, given that the bug was reproduced on Ubuntu, but not on Debian, where gimp is an earlier version, or using flatpak. The problem may be with the apt installation, since flatpak works, and which the GIMP team might not be able to fix as easily as Ubuntu.

$ lsb_release -rd
Description: Ubuntu 18.10
Release: 18.10

$ apt-cache policy gimp
  Installed: 2.10.6-3
  Candidate: 2.10.6-3
  Version table:
 *** 2.10.6-3 500
        500 cosmic/universe amd64 Packages
        100 /var/lib/dpkg/status

What I expected to happen:
Icon size increases as slider increases through small, medium, large, and huge

What happened instead:
Icon sizes revert to small at large setting, other elements change in unexpected ways at huge setting.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gimp 2.10.6-3
ProcVersionSignature: Ubuntu 4.18.0-15.16-generic 4.18.20
Uname: Linux 4.18.0-15-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 22 19:48:01 2019
ExecutablePath: /usr/bin/gimp-2.10
InstallationDate: Installed on 2019-02-11 (11 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
 PATH=(custom, no user)
SourcePackage: gimp
UpgradeStatus: No upgrade log present (probably fresh install)

Talib Pierson (talib0110) wrote :
Talib Pierson (talib0110) wrote :

I believe these settings are stored at '~/.config/GIMP/2.10/gimprc', although bug occurs before setting is saved when "OK" is pressed in Preferences.

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in gimp (Ubuntu):
status: New → Confirmed
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