836011 - Request camera access for camera, release it, request camera access for camera again - no video shown

Status: VERIFIED FIXED

(Core :: WebRTC: Audio/Video, defect, P1)

Description

[Jason Smith [:jsmith]]

Build: 1/29 Nightly

Steps:

1. Go to http://mozilla.github.com/webrtc-landing/gum_test.html
2. Select video
3. Accept permissions for camera A
4. Select stop
5. Select video
6. Accept permissions for camera B

Expected:

The video from camera B should play.

Actual:

Nothing is shown in the video. Saw this with this test case and when testing the multiple consumers bug.

Comment 1

[Jason Smith [:jsmith]]

Going to go ahead and guess this is probably a blocker - seems relatively basic.

Comment 2

[Jason Smith [:jsmith]]

Actually, this apparently happens with any camera. Let me try my own test case to weed out the possibility this is a bug in the test cases.

Comment 3

[Jason Smith [:jsmith]]

Okay, confirmed with my local test case. Definitely not a test case bug. Something regressed here...

Comment 4

[Mark Banner (:standard8)]

I see this with the nightly build of 27th Jan which was built from http://hg.mozilla.org/mozilla-central/rev/f18b12139151

I do not see this with a try build of alder which was built from mozilla-central https://hg.mozilla.org/mozilla-central/rev/de2f88640ab6 with this patch that shouldn't affect this bug: (http://hg.mozilla.org/try/rev/b65e3c2ba7be).

http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=de2f88640ab6&tochange=f18b12139151

Comment 5

[Randell Jesup [:jesup] (needinfo me)]

Breaks all kinds of use-cases for GetUserMedia()

Comment 6

[Randell Jesup [:jesup] (needinfo me)]

blocking- now that the root cause has been backed out for now.

Comment 7

[Jason Smith [:jsmith]]

(In reply to Randell Jesup [:jesup] from comment #6)
> blocking- now that the root cause has been backed out for now.

What patch was backed out to remove this?

Comment 8

[Jason Smith [:jsmith]]

(In reply to Jason Smith [:jsmith] from comment #7)
> (In reply to Randell Jesup [:jesup] from comment #6)
> > blocking- now that the root cause has been backed out for now.
> 
> What patch was backed out to remove this?

Oh wait, didn't see the blocking bug - bug 804875.

Comment 9

[Ryan VanderMeulen [:RyanVM]]

Fixed by backout.
https://hg.mozilla.org/mozilla-central/rev/3bc1aa6145ed

Comment 10

[Jason Smith [:jsmith]]

Verified on 2/3 that backout fixed the bug.