GtkTreeView separators garbled display with Lubuntu default theme

Bug #1781689 reported by Konstantin Pastbin on 2018-07-14
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Lubuntu Artwork
Fix Released
Simon Quigley
lubuntu-artwork (Ubuntu)
Simon Quigley

Bug Description


When a user hovers over a row in a GtkTreeView, it collapses and becomes unreadable. The only alternative to make this work, before the fix, is to switch themes from the default Lubuntu theme.

[Test Case]

Install Lubuntu 18.04 and try to use an application such as Exaile which uses GtkTreeView. All text should be visible and shouldn't collapse, hiding the text, unless the application author intended it (which Exaile didn't).

[Regression Potential]

If the underlying GTK library handling theming changes in a breaking way (which is rare in a stable release but commonplace in the development release) this could very well regress.

[Original Description]

The rows in a GtkTreeView with separators glitch as you move your mouse over it in Lubuntu 18.04 fresh install.

Spotted in Exaile music player (originally reported as

The issue disappears after switching to a different widget style, e.g. Clearlooks.
The issue didn't exist in Lubuntu 16.04 default theme.

A similar bug fixed in Ubuntu Ambiance theme

[Other Info]

This only affects Bionic because Cosmic and on does have the Box theme anymore.

Konstantin Pastbin (pastknz) wrote :
Simon Quigley (tsimonq2) wrote :

Hi, thanks for the bug report.

Could you please test my fix in ppa:tsimonq2/sru-testing and tell me if that fixes it? Maybe try a few other applications and see if everything's working properly?

Thank you.

Konstantin Pastbin (pastknz) wrote :

Hi Simon,

your fix works like a charm, the GtkTreeView is behaving properly in Exaile now!
Unfortunately I don't know any other apps that use GtkTreeView specifically. I just can confirm that I don't see any regressions in the apps I do use.


Simon Quigley (tsimonq2) wrote :

Hi Konstantin,

I am uploading this fix to the Bionic queue now. I would be very grateful if you could help complete the Stable Release Update verification when an SRU Team member accepts this upcoming work week and leaves a comment here.

Thanks again for your patience.

description: updated
Changed in lubuntu-artwork (Ubuntu):
status: New → Invalid
Changed in lubuntu-artwork:
status: New → Confirmed
Changed in lubuntu-artwork (Ubuntu Bionic):
status: New → Confirmed
assignee: nobody → Simon Quigley (tsimonq2)
Changed in lubuntu-artwork:
assignee: nobody → Simon Quigley (tsimonq2)
importance: Undecided → Medium
Changed in lubuntu-artwork (Ubuntu):
importance: Undecided → Medium
Changed in lubuntu-artwork (Ubuntu Bionic):
importance: Undecided → Medium

Hello Konstantin, or anyone else affected,

Accepted lubuntu-artwork into bionic-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at . Thank you in advance!

Changed in lubuntu-artwork (Ubuntu Bionic):
status: Confirmed → Fix Committed
tags: added: verification-needed verification-needed-bionic
Konstantin Pastbin (pastknz) wrote :

I've upgraded all the following packages to version 0.71.1 from bionic-proposed:
- lubuntu-artwork
- lubuntu-artwork-18-04
- lubuntu-icon-theme
- lubuntu-lxpanel-icons
- plymouth-theme-lubuntu-logo
- plymouth-theme-lubuntu-text

Rebooted and spent around a day using the apps as usual.

The bug that was appearing in Exaile before the upgrade is fixed now.
I didn't notice any regressions in Exaile or in any other apps I used.

Looks good to me!

tags: added: verification-done-bionic
removed: verification-needed-bionic
Simon Quigley (tsimonq2) wrote :

Thank you!

Launchpad Janitor (janitor) wrote :

This bug was fixed in the package lubuntu-artwork - 0.71.1

lubuntu-artwork (0.71.1) bionic; urgency=medium

  * Fix support for GtkTreeView separators (LP: #1781689).

 -- Simon Quigley <email address hidden> Sat, 14 Jul 2018 01:58:17 -0500

Changed in lubuntu-artwork (Ubuntu Bionic):
status: Fix Committed → Fix Released

The verification of the Stable Release Update for lubuntu-artwork has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Simon Quigley (tsimonq2) on 2018-09-30
Changed in lubuntu-artwork:
status: Confirmed → Fix Released
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