Closed Bug 1325592 Opened 6 years ago Closed 6 years ago

[Linux] Unable to mute Flash v24 on Linux


(External Software Affecting Firefox Graveyard :: Flash (Adobe), defect, P2)



(firefox50 affected, firefox51 affected, firefox52 affected, firefox53 affected)

Tracking Status
firefox50 --- affected
firefox51 --- affected
firefox52 --- affected
firefox53 --- affected


(Reporter: pauly, Assigned: benjamin)



- Linux only

[Affected versions]:
- 50.1.0, 51b10, 53.0a1 (2016-12-22)

[Affected platforms]:
- Ubuntu 16.04

[Steps to reproduce]:
1. Open
2. Click on the screen to start the game
3. Click on the tab sound indicator to mute the sound

[Expected result]:
- Sound is muted and the icon reflects that properly

[Actual result]:
- The icon is displayed as muted, but the sound is still ON

[Regression range]:
- reproduced on FX 47
I'm not sure if the tab sound indicator on Flash pages has ever worked on Linux.
Component: Tabbed Browser → Plug-ins
Priority: -- → P3
Product: Firefox → Core
Duplicate of this bug: 1330195
Can someone help to look into this issue? This is a serious problem.
Duplicate of this bug: 1332371
Same problem here on FF 50.1.0 + Flash 24r0!
Prior to the recent update, Flash 11 for Linux didn't support the audio notifications at all.

After the update to Flash 24, it appears that Flash now sends audio notifications to Firefox, but doesn't mute when we ask it to. This is almost certainly an Adobe issue and I've raised it with our partner engineers.
Component: Plug-ins → Flash (Adobe)
Product: Core → External Software Affecting Firefox
Version: 51 Branch → unspecified
I've opened an enhancement request for this.  The bug is FLASH-4187266
After further investigation, we've observed a difference in behavior with Firefox on Linux vs other platforms. 

Here's the analysis from our engineer:

To control mute/unmute, Firefox passes "NPNVmuteAudioBool" to plugin via "NPP_SetValue", this works well on Windows, but on Linux, flash player never receives "NPNVmuteAudioBool" from "NPP_SetValue", so I think this is a bug of Firefox Linux.
I'm debugging.
Assignee: nobody → benjamin
Priority: P3 → P2
Jeromie, here's what I've found: it appears that when Firefox calls NP_GetEntryPointsFunc on Linux, Flash fills in the NPPluginFuncs structure but setvalue (NPP_SetValue) remains null:

So you are not receiving any NPP_SetValue functions from the browser (on Linux), which probably breaks all of the following features:

* private browsing notifications
* audio muting
* CSS zoom notifications

I think it's likely that you've coded a NPP_SetValue but just haven't included it in the glue code that sets up the initial structure.
Flags: needinfo?(jeclark)
Great, thanks for the insight.  I've kicked this bug back with your input.
Flags: needinfo?(jeclark)
Today I got the update for flashplugin.
Muting on Antergos is now working. 

13:12:18 ~$ pacman -Qs flashplugin
    Adobe Flash Player
Duplicate of this bug: 1349201
We believe that this was fixed (on Linux) in the most recent Flash release. Please reopen if you're still seeing this with Flash or later.
Closed: 6 years ago
Resolution: --- → WORKSFORME
Product: External Software Affecting Firefox → External Software Affecting Firefox Graveyard
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