Fenix: [Crash] Nightly keeps crashing when scrolling on any page

[dglttr]

Steps to reproduce

1. Open any page on Nightly.
2. Scroll rapidly down.

Expected behavior

Fenix doesn't crash.

Actual behavior

Page first briefly freezes, then the entire browser crashes.

Device information

• Android device: Fairphone 3
• Android version: 9

Nightly version information where this first appeared (before, I never had issues in that regard):

• Nightly 200903 06:04 (Build #2015761715)
• AC: 58.0.20200901190136, 478151899
• GV: 82.0a1-20200831091558
• AS: 61.0.13
• Thursday 9/3 @ 6:10 AM

I tried waiting a bit, but this keeps happening two days later:

• Nightly 200905 06:01 (Build #2015762099)
• AC: 58.0.20200904130229, b6c304b2a
• GV: 82.0a1-20200902095359
• AS: 61.0.13
• Saturday 9/5 @ 6:09 AM

I already tried deleting the cache, the browser data and also uninstalled and reinstalled Nightly. Nothing helped.
I don't have any add-ons installed and basically use all default settings.
To me, this seems like a GeckoView problem, because I can navigate all other Fenix menus without a problem. This only happens when scrolling on websites.

[hwinnemoe]

Can you please include your crashreports here, if you can access them? Also, if possible, open about:support and look for main topic Graphics, subtopic Features, what is says next to _Compositing_.

[dglttr]

@hwinnemoe

open about:support and look for main topic Graphics, subtopic Features, what is says next to Compositing.

It says WebRender.

[dglttr]

Soccorro report: https://crash-stats.mozilla.org/report/index/8dfa1b7c-5ca0-4496-a870-ff8810200905

[hwinnemoe]

Seems to be a duplicate of https://github.com/mozilla-mobile/fenix/issues/14624. Still, I'm puzzled that your device has active WR, did you activate this yourself?

[dglttr]

I'm puzzled that your device has active WR, did you activate this yourself?

No, I didn't. No idea why this is on.

[hwinnemoe]

Just to double-check, what does it say next to _WebGL 1 Driver Renderer_? That's a little bit further down in the same section on about:support

[dglttr]

It says "Qualcomm -- Adreno (TM) 506".

[hwinnemoe]

Your crash _should_ be unrelated to having WR (WebRender) active, it is not specific to devices with active WR, so you can follow https://github.com/mozilla-mobile/fenix/issues/14624 for a fix.

Regarding WR, can you please go to about:config and look up the current setting for

• gfx.webrender.all
• gfx.webrender.enabled
• gfx.webrender.force-disabled

Furthermore, please tell me what is says on about:support next to Graphics, Decision Log, _WEBRENDER_ and _WEBRENDER_QUALIFIED_

[dglttr]

Settings in about:config:

• gfx.webrender.all: false
• gfx.webrender.enabled: false
• gfx.webrender.force-disabled: false

what is says on about:support next to Graphics, Decision Log, WEBRENDER and WEBRENDER_QUALIFIED

• WEBRENDER: "opt-in by default: WebRender is an opt-in feature. available by user: Qualified enabled by pref"
• WEBRENDER_QUALIFIED: available by default

[hwinnemoe]

Thanks! I will open a BZ issue for this, WR should not be activated on your device (yet). Edit: it's actually fine for this device to have active WR on Nightly, see https://github.com/mozilla-mobile/fenix/issues/14763#issuecomment-687653622.

[dglttr]

Could you post the link here once you've filed it?
Thanks for following up on this!

[hwinnemoe]

If it's not too much of an inconvenience for you, could you just copy&paste the whole decision log as well as the GPU #'1 section from about:support here? That way we can be sure that we did not miss something. If it crashes when highlighting the text, you can use the "copy text to clipboard" button on the top and edit out anything else.

[dglttr]

Decision Log:
HW_COMPOSITING
available by default
force_enabled by user: Force-enabled by pref
OPENGL_COMPOSITING
available by default
force_enabled by user: Force-enabled by pref
WEBRENDER
opt-in by default: WebRender is an opt-in feature
available by user: Qualified enabled by pref
WEBRENDER_QUALIFIED
available by default
WEBRENDER_COMPOSITOR
disabled by default: Disabled by default
WEBRENDER_ANGLE
opt-in by default: WebRender ANGLE is an opt-in feature
WEBRENDER_DCOMP_PRESENT
opt-in by default: WebRender DirectComposition is an opt-in feature
OMTP
disabled by default: Disabled by default
WEBGPU
disabled by default: Disabled by default

GPU #'1:
Active: Yes
Description Model: FP3, Product: FP3, Manufacturer: Fairphone, Hardware: qcom, OpenGL: Qualcomm -- Adreno (TM) 506 -- OpenGL ES 3.2 [email protected] (GIT@4daeac4, I85e9875322) (Date:06/01/19)
Vendor ID: Qualcomm
Device ID: Adreno (TM) 506
Driver Version: OpenGL ES 3.2 [email protected] (GIT@4daeac4, I85e9875322) (Date:06/01/19)
RAM: 0

[hwinnemoe]

So I managed to contact a developer and it's fine for your device to have active WR, at least on Nightly, it is still blocked for WR on Beta and Release. Sorry for the trouble, but now we know for sure! 😅

[dglttr]

Closing this as dupe of #14624.