1979488 - Wayland backend, Nightly ~ VRAM leaking

Status: NEW

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

Description

[Kyle De'Vir]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:143.0) Gecko/20100101 Firefox/143.0

Steps to reproduce:

Run Nightly with Wayland backend

Install KDE ~ configure virtual desktops to multiple. 2 is sufficient.

Open nvtop on separate virtual desktop to Firefox Nightly.

Switch between virtual desktops.

Actual results:

Pay attention to the VRAM bloating over time as you do more repetitions of the above.

Expected results:

No VRAM bloat

Comment 1

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

Can you please test latest nightly?
Thanks.

Comment 2

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #1)

Can you please test latest nightly?
Thanks.

Can reproduce with latest Nightly (20250726211115)

Comment 3

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

Please attach your about:support.
Thanks.

Comment 4

[Kyle De'Vir]

Attachment: FirefoxNightly20250730213201Support.log

Comment 5

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #3)

Please attach your about:support.
Thanks.

Done

Comment 6

[Kyle De'Vir]

Hmmmm. Can't seem to reproduce with a fresh profile.

But my current old profile is definitely triggering some bug somewhere.

Comment 7

[Thinker Li [:sinker] offline before Aug 11]

You has installed and activated a lot of addons in your old profile. It can be one of them cause leaking.

Comment 8

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

    "gfx.wayland.hdr": true,
    "gfx.webrender.compositor": true,
    "gfx.webrender.compositor.force-enabled": true,

That's the reason.

Comment 9

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

The bug has a release status flag that shows some version of Firefox is affected, thus it will be considered confirmed.

Comment 10

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #8)

    "gfx.wayland.hdr": true,
    "gfx.webrender.compositor": true,
    "gfx.webrender.compositor.force-enabled": true,

That's the reason.

No, that's just a mistake from my testing and fiddling ~ I can reproduce the issue when gfx.wayland.hdr is false.

VRAM usage just keeps ballooning over time ~ even without me switching desktops...? Seems to keep shooting up as I open more and more tabs ~ and doesn't go down even when they're closed.

Comment 11

[Kyle De'Vir]

(In reply to Thinker Li [:sinker] from comment #7)

You has installed and activated a lot of addons in your old profile. It can be one of them cause leaking.

Possibly ~ except this doesn't happen with X11 backend on the same profile.

Comment 12

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

Please attach about:support page from the profile where it happens, without the "testing and fiddling".
Thanks.

Comment 13

[Kyle De'Vir]

Attachment: FirefoxNightlyWayland-20250801103155-Support.log

Comment 14

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #12)

Please attach about:support page from the profile where it happens, without the "testing and fiddling".
Thanks.

Done

Comment 15

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

Looks like you still have enabled everything you can find at about:config:

    "gfx.webrender.all": true,
    "gfx.webrender.compositor": true,
    "gfx.webrender.compositor.force-enabled": true,
    "gfx.webrender.enabled": true,
    "gfx.webrender.layer-compositor": true,
    "gfx.webrender.precache-shaders": true,

Anyway, what you see is dupe of Bug 1980585.

Comment 16

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #15)

Looks like you still have enabled everything you can find at about:config:

    "gfx.webrender.all": true,
    "gfx.webrender.compositor": true,
    "gfx.webrender.compositor.force-enabled": true,
    "gfx.webrender.enabled": true,
    "gfx.webrender.layer-compositor": true,
    "gfx.webrender.precache-shaders": true,

Anyway, what you see is dupe of Bug 1980585.

*** This bug has been marked as a duplicate of bug 1980585 ***

These were enabled during my X11 backend sessions too.

Unless they just have no effect on the X11 backend?

Comment 17

[Kyle De'Vir]

(In reply to Martin Stránský [:stransky] (ni? me) from comment #15)

Looks like you still have enabled everything you can find at about:config:

    "gfx.webrender.all": true,
    "gfx.webrender.compositor": true,
    "gfx.webrender.compositor.force-enabled": true,
    "gfx.webrender.enabled": true,
    "gfx.webrender.layer-compositor": true,
    "gfx.webrender.precache-shaders": true,

Anyway, what you see is dupe of Bug 1980585.

*** This bug has been marked as a duplicate of bug 1980585 ***

With the above bug you're marking this as a duplicate of... how can it be HDR when I'm still getting VRAM leakage without HDR on?

Comment 18

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

The bug has a release status flag that shows some version of Firefox is affected, thus it will be considered confirmed.