Some characters are invisible (libreoffice/freetype) - depends on font-rendering

Bug #1464056 reported by RichardNeill on 2015-06-11
This bug affects 4 people
Affects Status Importance Assigned to Milestone
freetype (Ubuntu)

Bug Description

  Certain characters are not reliably displayed in LibreOffice. Which character is visible depends on font size, font face, and even mouse-over. It looks as though about 40% of the letters have been randomly made white-on-white!
(This is really weird to track down, and extremely annoying!)

 * I note that this affects LO, but not export to PDF. It also shows up in Abiword.
 * The font needs to be about 18pt or higher to show this, eg Liberation Sans, 18pt. Font-face doesn't seem to matter.
 * Mouse-over the text, or even changing the window size alters which letters vanish.

Test case (after hours of experimenting):
 * Font-rendering: smoothing = None -> triggers this bug.
 * Font-rendering: smoothing = Greyscale -> all is well.

I attach some screenshots both ways, to make this clear, showing both LO and the control panel. Toggling from one setting to the other makes the bug appear/disappear immediately.

I think the root cause is in libfreetype6, but it might be in Cairo, or elsewhere.
I'm using Ubuntu Wily-64 (having upgraded today from Vivid which also had the same bug)
I'm running this under Ubuntu-Mate.

Still present as of 5th August in latest Wily.

This may be more useful filed upstream:

Launchpad Janitor (janitor) wrote :

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

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

...and it's still here in 16.04.1 LTS.
Any chance of a fix?

Adolfo Jayme (fitojb) on 2017-03-18
Changed in freetype (Ubuntu):
importance: Undecided → Low
Hugh McMaster (hmcmaster) wrote :

I can't reproduce this. Are you still seeing this bug?

Hugh McMaster (hmcmaster) wrote :

Closing. Fixed long ago.

Changed in freetype (Ubuntu):
status: Confirmed → Fix Released
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