Ubuntu
plasma-desktop package

Default KDE browser cannot be changed, "Apply" button is disabled

Bug #1878920 reported by Anatoly Borodin
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
plasma-desktop (Ubuntu)
Confirmed
Undecided
Unassigned
systemsettings (Ubuntu)
Incomplete
Undecided
Unassigned

Bug Description

The default browser cannot be changed in Kubuntu 20.04

Reproduce:

Open "System Settings", select "Default Application"->"Web Browser", change a radio button state.

Result: "Apply" stays disabled, the changes are not saved.

Expected: the button "Apply" becomes active, like with any other options (works with "Terminal Emulator", "File manager" etc).

System version:

Linux helium 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 Description: Ubuntu 20.04 LTS
ii systemsettings 4:5.18.4.1-0ubuntu1 amd64 System Settings interface

Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :
Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :

Chromium has been my default browser for quite long time. Recently, somewhere during the Focal development phase, Konqueror started to get launched by default, and I can change but cannot save the settings with the System Settings application anymore.

affects: chromium-browser (Ubuntu) → systemsettings (Ubuntu)
Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :

The file with the string "with the following command:" is /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_componentchooser.so from plasma-desktop.

ii plasma-desktop 4:5.18.4.1-0ubuntu1 amd64 Tools and widgets for the desktop

Revision history for this message
Olivier Tilloy (osomon) wrote :

I'm unable to observe the problem here. I created a Kubuntu 20.04 VM, and after installing the chromium snap, when opening the system settings I am able to set chromium as the default web browser, and apply the change. See attached screenshot.

Changed in systemsettings (Ubuntu):
status: New → Incomplete
Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :

I think I know how to reproduce it:

In my .config/kdeglobals I have a line

[General]
BrowserApplication[$e]=chromium-browser.desktop
...

After I removed this line, the "Apply"button started to work properly, and I could select Chrome. The line after saving:

[General]
BrowserApplication=chromium_chromium.desktop
...

Note the absence of "[$e]" and a different .desktop file name.

Changing "BrowserApplication" to "BrowserApplication[$e]" doesn't break the settings dialog. But changing "chromium_chromium.desktop" to any nonexistent file name (e.g. "chromium_chromiummmmmmmm.desktop") does.

The name of the Chromium's desktop file was probably changed recently during the migration to Snap.

Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :

Something should be wrong in kcms/componentchooser/componentchooserbrowser.cpp , probably in CfgBrowser::configChanged() and/or CfgBrowser::load().

Revision history for this message
Anatoly Borodin (anatoly.borodin) wrote :

Also note: there was been a huge refactoring in this file in the commit 05569e53fd3e ("KCM/Component Revamp Browser config"). The commit is available in the release v5.18.90.

Revision history for this message
Launchpad Janitor (janitor) wrote :

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

Changed in plasma-desktop (Ubuntu):
status: New → Confirmed
Revision history for this message
Isaac True (itrue) wrote :

I can confirm what @anatoly.borodin reported is still the case: when the file BrowserApplication is set to does not exist the setting cannot be changed. Removing the line allowed me to set the application again in the system settings.

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