1192221 - [intermittent] Glitches visible via getUserMedia test page

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[Ada [:adalucinet]]

Reproducible with 40.0 RC build 4 (Build ID: 20150806153638), latest 41.0a2 and 42.0a1 (both from 2015-08-06)
Affected platforms: Windows 7 64-bit

Steps to reproduce:
1. Launch Firefox and navigate to http://mozilla.github.io/webrtc-landing/gum_test.html
2. Click on Video or Audio&Video button.
3. Share devices when prompted.
4. Wait a few seconds

Expected result: No glitch visible. 
Actual result: Glitches are displayed.

Additional notes:
1. Unable to reproduce with NVIDIA GeForce GT 610 nor AMD Radeon HD 6450 graphics, Windows 7 64-bit.
2. Reproducible with hardware acceleration disabled and also with 39.0b7 - not a recent regression.
3. Graphics:
Graphics
Adapter Description	NVIDIA GeForce 210
Adapter Drivers	nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter RAM	1024
Asynchronous Pan/Zoom	none
Device ID	0x0a65
Direct2D Enabled	true
DirectWrite Enabled	true (6.2.9200.17292)
Driver Date	2-3-2015
Driver Version	9.18.13.4144
GPU #2 Active	false
GPU Accelerated Windows	1/1 Direct3D 11 (OMTC)
Subsys ID	040110b0
Supports Hardware H264 Decoding	true
Vendor ID	0x10de
WebGL Renderer	Google Inc. -- ANGLE (NVIDIA GeForce 210 Direct3D11 vs_4_1 ps_4_1)
windowLayerManagerRemote	true
AzureCanvasBackend	direct2d 1.1
AzureContentBackend	direct2d 1.1
AzureFallbackCanvasBackend	cairo
AzureSkiaAccelerated	0

Comment 1

[Maire Reavy [:mreavy]]

Hi Milan -- There's a good chance that this affects video playback on this hardware/with this driver as well.  When do you think someone from gfx can look at this?  Thanks.

Comment 2

[Milan Sreckovic [:milan] (needinfo for best results)]

I'm assuming the about:support is from when the hardware acceleration is not disabled; Alexandra, can you also show what the graphics section of about:support looks like when the hardware acceleration is disabled and this problem shows up?

If there is a chance for a regression range, it'd be handy.

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Randomly tried a couple of Windows 7 laptops (with acceleration disabled) - I don't see problems; can you attach an image of what the glitches look like?

Comment 4

[Ada [:adalucinet]]

(In reply to Milan Sreckovic [:milan] from comment #2)
> I'm assuming the about:support is from when the hardware acceleration is not
> disabled; Alexandra, can you also show what the graphics section of
> about:support looks like when the hardware acceleration is disabled and this
> problem shows up?
 
Graphics section with HWA disabled:
Adapter Description	NVIDIA GeForce 210
Adapter Drivers	nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter RAM	1024
Asynchronous Pan/Zoom	wheel input enabled
Device ID	0x0a65
DirectWrite Enabled	false (6.2.9200.17461)
Driver Date	2-3-2015
Driver Version	9.18.13.4144
GPU #2 Active	false
GPU Accelerated Windows	0/2 Basic (OMTC)
Subsys ID	040110b0
Supports Hardware H264 Decoding	No; Hardware video decoding disabled or blacklisted
Vendor ID	0x10de
WebGL Renderer	Google Inc. -- ANGLE (NVIDIA GeForce 210 Direct3D11 vs_4_1 ps_4_1)
windowLayerManagerRemote	true
AzureCanvasBackend	skia
AzureContentBackend	cairo
AzureFallbackCanvasBackend	cairo
AzureSkiaAccelerated	0

I may say that with HWA disabled, the issue is still visible but more rarely.
Here is a hardly caught screenshot: http://i.imgur.com/XhvI39F.png

> If there is a chance for a regression range, it'd be handy.
Unfortunately I'm on PTO until September 7th, but Vasilica here will give it a try.

Comment 5

[Ada [:adalucinet]]

Vasilica pointed that she was unable to reproduce this issue on the same Windows 7 64-bit machine. I also confirm the same: not reproducible with latest 41.0b7, 42.0a2 nor 43.0a1; same result with 9.18.13.4144 driver version and the last one, 9.18.13.4181. Maybe something fixed this in the meantime?! Although, while testing I've encountered crash bug 1202424.

Comment 6

[Gregory Pappas [:gregp]]

Closing per comment 5