1644312 - [KDE] Firefox won't launch with Wayland v.3 wl_compositor

Status: RESOLVED WONTFIX

(Core :: Widget: Gtk, defect, P3)

Description

[Brock Jones]

Attachment: debug-mode-wayland.txt

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

Open terminal and enter export MOZ_ENABLE_WAYLAND=1, then launch firefox from the terminal. I am on Debian Buster with KDE wayland

Actual results:

Firefox doesn't open. Instead I get this

[natalie@debian ~]$ /opt/firefox-nightly/firefox
[GFX1-]: Failed to load EGL library: FEATURE_FAILURE_NO_DISPLAY
[GFX1-]: Failed to load EGL library: FEATURE_FAILURE_NO_DISPLAY
Gdk-Message: 21:05:19.328: Error 71 (Protocol error) dispatching to Wayland display.
[natalie@debian ~]$
###!!! [Child][MessageChannel] Error: (msgtype=0xFFF7,name=<unknown IPC msg name>) Channel error: cannot send/recv

Expected results:

Firefox should open

Comment 1

[Brock Jones]

This is the user agent of my firefox nightly

Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 3

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

Please try to run in gdb as:

$MOZ_ENABLE_WAYLAND=1 MOZ_FORCE_DISABLE_E10S=1 gdb ./firefox

run firefox and attach the backtrace. (see https://fedoraproject.org/wiki/Debugging_guidelines_for_Mozilla_products#Running_application_in_debugger)

Looks like Firefox failed to create GL context.
Thanks.

Comment 4

[Brock Jones]

Attachment: Contains the results of MOZ_ENABLE_WAYLAND=1 MOZ_FORCE_DISABLE_E10S=1 gdb

Comment 5

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

It seems to fail here:
https://searchfox.org/mozilla-central/rev/fac90408bcf52ca88a3dcd2ef30a379b68ab24e2/gfx/gl/GLLibraryEGL.cpp#830

which leads to:
https://searchfox.org/mozilla-central/rev/fac90408bcf52ca88a3dcd2ef30a379b68ab24e2/gfx/gl/GLLibraryEGL.cpp#236

but I have no idea why it fails. Can you try gnome wayland session for instance?

Comment 6

[Brock Jones]

I tried it on Weston (Gnome wayland is a lot to install) and it worked perfectly fine. Let me know if you need me to still try it on Gnome or something else

Comment 7

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

Weston is OK. I think it's something in KDE/GL config.

Comment 8

[Darkspirit]

[1597999.392] [e-mail](wl_registry@13, 0, "invalid version for global wl_compositor (1): have 3, wanted 4")

I have found a 4 here:

• https://searchfox.org/mozilla-central/rev/4bb2401ecbfce89af06fb2b4d0ea3557682bd8ff/widget/gtk/nsWaylandDisplay.cpp#272
• https://github.com/KDE/kwayland/blob/09147becf9b1a27b54048f7d97bf22f06ac946cb/src/server/compositor_interface.cpp#L40
  It was increased from 3 to 4 by https://phabricator.kde.org/D15910#417307, which says "Will be pushed after 5.56 branched off.".
  I assume this refers the the Plasma Framework version number. Then it looks like this:
  Debian Stable has plasma-framework (5.54.0-1), therefore 3.
  Debian Testing has 5.70.1-1, therefore 4.
  Ubuntu 18.04 has 5.44.0-0ubuntu3, therefore 3.
  Ubuntu 19.10 has 5.62.0-0ubuntu2, therefore 4.
  I have found https://pkgs.org/download/kf5-frameworkintegration, which version numbers seems to fit:
  "Fedora 30" (fresh install?) has 5.55.0-2, therfore 3.
  "Fedora 30 Fedora Updates" has 5.68.0-1, therefore 4.

According to https://wayland.freedesktop.org/docs/html/ch04.html#sect-Protocol-Versioning Wayland interfaces are versioned. Firefox wants wl_compositor interface version 4, but KDE on Debian Stable only supports 3.
Hard Freeze of Debian Bullseye (currently testing) is 2021-03-12.

Side Note: On Debian Testing I am still affected by (horrible) bug 1593478. It was fixed with Plasma 5.18.4, but Debian Testing is still at 5.17.5. Some windows like the file picker sometimes don't show up at all.
At the moment, I wouldn't recommend to use KDE Wayland with Debian Testing. Better use Fedora (Fedora's Firefox team maintains Gtk in Firefox) or at least Ubuntu 20.04 (both have 5.18.5). Arch Linux already has 5.19.0.

Comment 9

[Brock Jones]

Thanks for your help

Comment 10

[Botond Ballo [:botond]]

I'm getting the same error trying to run Firefox in Wayland more on Debian stable.

Is there a workaround, or is it possible to create one (that is, to allow Firefox to run with wl_compositor v3)?

Comment 11

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

(In reply to Botond Ballo [:botond] from comment #10)

I'm getting the same error trying to run Firefox in Wayland more on Debian stable.

Is there a workaround, or is it possible to create one (that is, to allow Firefox to run with wl_compositor v3)?

Unfortunately no, we need the v4 compositor for wl_surface_damage_buffer().

Comment 12

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

I'm afraid this is a wontfix as we can't use the v3 compositor. Darkspirit, thanks a lot for investigating this one!