with default font, empty lines have different height to non-empty lines

[Andy Owen]

I suspect this bug is not a gedit bug, but a font bug, however I'm not sure.

Steps to reproduce:

1) Ensure font is the default "Use the system fixed width font (Ubuntu Mono 13)" is checked.

2) Create two tabs, in one tab write:

1
2
3
4

In the other tab, write:

<blank>
<blank>
<blank>
4

Switch between the tabs and observer that line 4 is in a different location in each tab.

Using a different font "Monospace Regular 12" makes the problem go away, hence I suspect the problem is the font.

[Launchpad Janitor (janitor)]

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

[Harm van Bakel (hvbakel)]

There is a similar issue in e.g. gnome calculator. When typing a character after starting a new instance the input box will change size. This only seems to happen with certain combinations of fonts and sizes. Wonder if it may be linked to hidpi scaling, though haven't been able to check if the same issue occurs on standard screens.

[Andy Owen (the-new-andy)]

Yes, I can confirm it happens for me with the gnome calculator too. Also, I'm running at 2560x1440 with scale=100% on one affected machine and 3200x1800 with scale=200% on another, which I think means that it isn't hidpi or scaling related.

[Harm van Bakel (hvbakel)]

The underlying issue appears to be in pango, tracked upstream at: https://gitlab.gnome.org/GNOME/pango/-/issues/421

[Sebastien Bacher (seb128)]

@Harm, thanks for the upstream bug reference!