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Bug 2114896

Summary:	Cannot find pipewire audio equivalent of xhost for display
Product:	Red Hat Enterprise Linux 9	Reporter:	Roger Sewell <roger.sewell>
Component:	pipewire	Assignee:	Wim Taymans <wtaymans>
Status:	CLOSED MIGRATED	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	9.0	CC:	ndegraef, tpelka, wtaymans
Target Milestone:	rc	Keywords:	MigratedToJIRA
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-09-11 15:02:56 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Roger Sewell 2022-08-03 13:20:28 UTC

Description of problem: If user1 wants user2 to be able to display on his screen, the xhost command enables user1 to permit this; I cannot find any equivalent allowing user2 to play audio on user1's audio output.


Version-Release number of selected component (if applicable):

pipewire-0.3.47-2.el9_0.x86_64

How reproducible: (Always)


Steps to Reproduce:
1. login to display (and audio) as user1
2. xhost +si:localuser:user2 (thus giving user2 permission to access display)
3. su - user2
4. invoke a program that plays audio (and that works if step 3 is omitted); I tried both vlc and firefox with same result.

Actual results:

Audio output failed:
The audio device "default" could not be used:
Host is down.

Expected results:

Sound played on user1's audio output.

Additional info:

This used to work in 8.6 before upgrade to 9.0 . Moreover the sockets 

./run/user/1000/pipewire-0
./run/user/1000/pulse/native

both are readable and writeable by both user1 and user2.

Comment 1 Roger Sewell 2022-12-07 16:24:32 UTC

This problem remains unchanged in 9.1 .

Comment 2 Wim Taymans 2023-01-26 15:27:14 UTC

I think this has something to do with the X11 properties that pulseaudio (but not pipewire-pulse) sets.

As a workaround this should work:

PULSE_SERVER=/run/user/1000/pulse/native vlc

Comment 3 Roger Sewell 2023-01-26 17:02:43 UTC

Wim, thank you for the suggestion. Unfortunately it does not work.

As user1 I ran

xhost +si:localuser:user2
su - user2
PULSE_SERVER=/run/user/1000/pulse/native vlc &

(where 1000 is indeed the uid of user1)
and get

VLC media player 3.0.18 Vetinari (revision )
[00005599b9879ac0] vlcpulse audio output error: PulseAudio server connection failure: Connection refused

and then when I actually try to play a video with sound I get

Audio output failed:
The audio device "default" could not be used:
Host is down.

I also tried doing the above with SELinux set to permissive, which made no difference.

The only message in /var/log/messages is

Jan 26 16:59:58 revelation rtkit-daemon[1143]: Successfully made thread 6970 of process 6941 (/usr/bin/vlc) owned by '1001' RT at priority 20.

which doesn't help.

Very happy to try any other suggestions you may come up with.

Best wishes, Roger.

Comment 4 RHEL Program Management 2023-09-11 15:02:49 UTC

Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 5 RHEL Program Management 2023-09-11 15:02:56 UTC

This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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