1491237 - Linear artifacts on webpage rendering (NVIDIA control panel: Use my preference emphasizing = Quality)

Status: RESOLVED WONTFIX

(Core :: Graphics: WebRender, defect, P2)

Description

[Michael Flaherty]

Attachment: Ow9Ql.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0
Build ID: 20180913100107

Steps to reproduce:

case 1)
- Opened youtube.com
- Observed dotted artifacts on search bar
case 2)
- Opened forums.alliedmodders.com
- Observed streaking blue artifacts throughout the forum


Actual results:

See attached images, but there are clearly blue artifacts on the page. This wasn't present in the previous nightly update.


Expected results:

There should be absolutely no blue dots surrounding the search box, nor should there be blue streaks on the other page. I don't believe I'm able to attach a second image, so here's the link to the other blue streaks on forums.alliedmodders.com http://i.michaelwflaherty.com/JJL3A.png

Comment 1

[Michael Flaherty]

This issue can also be observed on https://wiki.mozilla.org/Nightly#I_found_a_bug.2C_how_do_I_report_it.3F

http://i.michaelwflaherty.com/JGIFJ.png

Comment 2

[Darkspirit]

Could you please open about:support, click on the "Copy text to clipboard" button, paste it into a text file and upload it here (Attach File)? Thanks!

Comment 3

[Michael Flaherty]

Attachment: info.txt

Comment 4

[Michael Flaherty]

I have also taken the liberty to disable addons to rule them out, artifacts still appear.

Comment 5

[Darkspirit]

Welcome to WebRender! It was enabled for modern Nvidia on a Win10 without battery in bug 1490742.
> GPU #1
> Active: Yes
> Description: NVIDIA GeForce GTX 1080
> Vendor ID: 0x10de
> Device ID: 0x1b80
> Driver Version: 24.21.13.9907
> Driver Date: 8-21-2018

> WEBRENDER:
> opt-in by default: WebRender is an opt-in feature
> available by user: Qualified enabled by pref

Comment 6

[Darkspirit]

I wasn't able to reproduce it so far with my GTX 1060 and the same driver version.

Comment 7

[Bobby Holley (:bholley)]

Hm, this seems bad. Michael, I assume the URL is https://forums.alliedmods.net/ , rather than the one you provided? Does the problem go away if you set gfx.webrender.all.qualified in about:config?

> Description: NVIDIA GeForce GTX 1080
> Vendor ID: 0x10de
> Device ID: 0x1b80
> Driver Version: 24.21.13.9907

Jeff, do we have a GTX 1080 somewhere in the hardware library?

Comment 8

[Darkspirit]

(Isn't gfx.webrender.all.qualified invisible?)
Does the problem go away if you open about:config, set gfx.webrender.force-disabled to true and restart Nightly?

Comment 9

[Bobby Holley (:bholley)]

(In reply to Jan Andre Ikenmeyer [:darkspirit] from comment #8)
> (Isn't gfx.webrender.all.qualified invisible?)

Yes, but you can still set it.

> Does the problem go away if you open about:config, set
> gfx.webrender.force-disabled to true and restart Nightly?

That's a much easier alternative, didn't know about it, thanks! Michael, please toggle that one instead.

Comment 10

[Bobby Holley (:bholley)]

Also, can you test with a clean profile?

Comment 11

[Michael Flaherty]

bholley: It seems that setting gfx.webrender.force-disabled to true makes the blue artifacts completely disappear.

What do you mean by clean profile?

Comment 12

[Bobby Holley (:bholley)]

(In reply to Michael Flaherty from comment #11)
> bholley: It seems that setting gfx.webrender.force-disabled to true makes
> the blue artifacts completely disappear.

That's helpful! It'll also be helpful to confirm that this happens with the out-of-the-box configuration, which is where the "clean profile" comes in.

> What do you mean by clean profile?

https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 13

[Jeff Muizelaar [:jrmuizel]]

I can't reproduce this with an identical build, on a GTX 1080 with exactly the same driver. So yes, can you test with a clean profile?

Comment 14

[Michael Flaherty]

bholley: a clean profile results in the identical bug, this exists in default configurations

Comment 15

[Jeff Muizelaar [:jrmuizel]]

What's the exact Windows version that you have? I'm using 10.0.17758 Build 17758. I got this information from the built-in System Information program.

Comment 16

[Jeff Muizelaar [:jrmuizel]]

Also, do you think you could get a screen recording of the glitch happening?

Comment 17

[Jeff Muizelaar [:jrmuizel]]

Another idea. Can you try "Restore Defaults" in the NIVIDA Control Panel?

Comment 18

[Glenn Watson [:gw]]

Could you report what the value of layout.css.devPixelsPerPx is in about:config? And also check if the blue lines disappear if you (temporarily) set that to 1.0 or 2.0?

Comment 19

[Glenn Watson [:gw]]

I'm also unable to reproduce locally on a Win10 machine with GTX 1050.

Comment 20

[Michael Flaherty]

My value of layout.css.devPixelsPerPx is/was -1.0, the blue lines exist on 1.0, and completely disappear on 2.0.

Furthermore, my windows version is 1803 OS build 17134.285
http://i.michaelwflaherty.com/6ZFpS.png

Restoring the default settings in the NVIDIA Control Panel result in no change.

Here are some gifs of the issue itself, they occasionally flicker. I've included some with and without flickering. It appears the color has also changed from blue to a grey. Not sure if that is significant at all.


1) http://i.michaelwflaherty.com/g/DVWwh.gif
2) http://i.michaelwflaherty.com/g/rp29b.gif

Comment 21

[Michael Flaherty]

jrmuizel: the version number from the System Information dialog is 10.0.17134 build 16134

Comment 22

[Michael Flaherty]

Typo, my apologies the version is "10.0.17134 build 17134"

Comment 23

[Glenn Watson [:gw]]

Nical, does it sound like this might be related to the (known?) issue with fractional snapping when tiling background images and/or gradients? (I forget the exact details, but I recall something like that being discussed).

Comment 24

[Darkspirit]

(If I change desktop scaling from 100% to "125% (Recommended)" without restarting Nightly, there are unusual grey lines between context menu entries after hovering over them. But it doesn't exactly look like this bug.)

Comment 25

[Glenn Watson [:gw]]

The background image on the wiki.mozilla page, and the gradient on the forum page both have repeat enabled. So I suspect it's something related to repeating, perhaps snapping / subpixel size related. Still a mystery why I can't repro locally though.

Comment 26

[Michael Flaherty]

Another note, after setting "preference emphasizing" to Quality on the NVIDIA control panel, these lines occur. Any other setting of the three appear to render usually.
http://i.michaelwflaherty.com/UqIsY.png

Comment 27

[Nicolas Silva [:nical]]

> Nical, does it sound like this might be related to the (known?) issue with fractional snapping when tiling background images and/or gradients? (I forget the exact details, but I recall something like that being discussed).

Could be related to snapping, yeah. I'm moderately surprised that the snapping issue would be hardware/driver specific though.

Comment 28

[Jeff Muizelaar [:jrmuizel]]

So to confirm, you only see the problem when "preference emphasizing" is set to "Quality"? What does restoring the default settings set it to?

Comment 29

[NVD]

https://www.nvidia.com/download/driverResults.aspx/138070/en-us

Does this happen on the latest Nvidia GeForce 411.63 WHQL driver?

Comment 30

[Darkspirit]

(In reply to Jeff Muizelaar [:jrmuizel] from comment #28)
> So to confirm, you only see the problem when "preference emphasizing" is set to "Quality"? What does restoring the default settings set it to?

Default is "Let the 3D application decide".

Comment 31

[Darkspirit]

Attachment: 2018-09-20 17-15-57.mp4

(In reply to NVD from comment #29)
> Does this happen on the latest Nvidia GeForce 411.63 WHQL driver?

Yes. (Win10, GTX 1060, Nightly 20180920100522)

Comment 32

[Jeff Muizelaar [:jrmuizel]]

We should investigate to see if this is possible to work around.

Comment 33

[Cy 'kkm' K'Nnelson]

I came here by way of bug 1496318 I filed.

I can confirm the grid artifacts from my bug disappear when I reset the settings to the defaults in NVidia control panel. I played with the settings that are reported in the "Manage 3D settings" differently between the "Quality" slider settings and the defaults.

The only settings that changes the behavior is "Anisotropic filtering". When set to Off or Let the application decide, the artifacts disappear. When set to x2, the grid is there, but its lines are thinner/fainter than in the images I have attached to that bug. When set to x4, x8 or x16, they look exactly the same as on the screenshots.

Hope this would help.

Comment 34

[Glenn Watson [:gw]]

Yes, that's helpful. Thanks!

Comment 35

[Glenn Watson [:gw]]

From jgilbert in IRC:

<jgilbert> gw: There is per-texture TEXTURE_MAX_ANISOTROPY that you can force to 1.0 instead of >1.0
<jgilbert> ANGLE *does* claim to support that ext, so it might be worth a shot
<jgilbert> gw: https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_texture_filter_anisotropic.txt

So, we can try to use that and see if it works (I'm not sure if the nVidia driver respects that even if the quality preference is set to force aniso).

Comment 37

[Jeff Muizelaar [:jrmuizel]]

There's not a lot of options we have for dealing with this and it doesn't seem widespread so we're not going to block the MVP

Comment 39

[Glenn Watson [:gw]]

I don't think there's anything we can do here to reliably fix this from our side.