1687979 - Bookmark Restore submenu no longer appears at some scaling factors

Status: RESOLVED FIXED

(Core :: Widget: Gtk, defect)

Description

[Kestrel]

Attachment: Restore menu highlighted but no visible submenu.

STR:

1. Start with MOZ_ENABLE_WAYLAND=1 on Ubuntu 20.10.
2. Open the Library window (Ctrl+Shift+O).
3. Click Import & Backup > Restore.

Restore submenu fails to appear.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=f0ea749647d34c1a290b3839f7dc8aa8f28e4801&tochange=0c0b1e3fab140328571088a912eb77c046fb7217

Regressed by Bug 1645695.

Comment 1

[Robert Mader [:rmader]]

Attachment: Screenshot from 2021-01-21 16-09-42.png

Hm odd, can't reproduce that here.

Any extra information about scale, resolution etc.?

Comment 2

[Kestrel]

I see this on multiple Ubuntu 20.10 systems that are close to stock with no scaling. I tried changing scaling factor and found that it worked for most scales except 1.0, 1.3 and 1.6.

Comment 3

[Martin Stránský [:stransky] (ni? me)]

(In reply to Kestrel from comment #2)

I see this on multiple Ubuntu 20.10 systems that are close to stock with no scaling. I tried changing scaling factor and found that it worked for most scales except 1.0, 1.3 and 1.6.

Kestrel, IIUC you have enabled experimental fractional scaling enabled, right? (https://www.linuxuprising.com/2019/04/how-to-enable-hidpi-fractional-scaling.html)

Can you try to turn it off and check with 100% and 200% scaling?
Thanks.

Comment 4

[Martin Stránský [:stransky] (ni? me)]

Yes, I can reproduce that too, I just verified that with mozregression.
We need to revert this one, updated Bug 1645695.

Comment 5

[Martin Stránský [:stransky] (ni? me)]

Fixed by backout of Bug 1645695.

Comment 6

[Kestrel]

Sorry for being unclear, that was the font scaling factor I was referring to in Comment 2, the system scaling factor is 100%. Firefox scales its interface according to font scale in a very similar way to fractional scaling which can be confusing.

Comment 7

[Martin Stránský [:stransky] (ni? me)]

I can reproduce it on monitor with 200% scale factor and default font scale (1x). When I move Firefox window to a monitor with 100% scale, I can open all popups.