1507989 - [hidpi][wayland][webrender] Window drawn incorrectly on startup in hidpi monitor on Wayland

Status: RESOLVED DUPLICATE of bug 1612377

(Core :: Widget: Gtk, defect, P5)

Description

[Nika Layzell [:nika] (ni? for response)]

These visual drawing problems do not occur when drawing with 200% and WebRender disabled, or when drawing with 100% with or without WebRender disabled.

This only occurs when I'm using the Wayland backend for Firefox.

I will attach a screenshot in a follow-up.

Comment 1

[Nika Layzell [:nika] (ni? for response)]

Attachment: Fullscreen Firefox NewTab Page.png

Comment 2

[Nika Layzell [:nika] (ni? for response)]

Running 65.0a1 (2018-11-16) (64-bit) on Ubuntu 18.10 (gnome wayland)

Comment 3

[Peter Bašista]

I am having a similar issue with Nightly 65.0a1 (2018-11-19) (64-bit) running on XWayland under Gnome with 200% scaling as a Wayland window (i.e. started like this: "GDK_BACKEND=wayland firefox").

Apart from the content being only visible in the upper left quarter of the window, the "action areas" (i.e. the ones where it is possible to click) are *not* aligned with the visual content of the rendered page. It seems like one of the two layers is shifted or distorted with respect to the other one.

Also, there are unrelated issues:
1. the list of tabs, address bar with buttons and the list of bookmarks are *not* visible at all
2. it is *not* possible to exit the process normally using Ctrl+Q. Instead of quitting, Firefox freezes and it is necessary to kill it (or perhaps wait a long enough time).

Comment 4

[Peter Bašista]

Attachment: A screenshot demonstrating issue with only the upper left quarter of Firefox window having content

Comment 5

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1552613

Comment 6

[ericdrex]

With sway, webrender enabled, dual display (one hidpi 2x one standard):

window renders as above on std res screen (but inputs are mapped to the entire window, so only output is scaled wrong).

No issue without webrender.

Not sure if this is the same issue but seems so.

Comment 7

[ericdrex]

I think this is the same as https://bugzilla.mozilla.org/show_bug.cgi?id=1528581 (rather that is a dup of this) which was fixed sometime before ff 71.

A new scale-related regression has the same symptoms and is being addressed in https://bugzilla.mozilla.org/show_bug.cgi?id=1612377