Bug 266876

Summary:	Removed Sound Devices dialog asks always even if deactivated
Product:	[Frameworks and Libraries] Phonon	Reporter:	Ralf Engels <ralf-engels>
Component:	general	Assignee:	Harald Sitter <sitter>
Status:	ASSIGNED ---
Severity:	normal	CC:	bcooksley, cfeck, dominik, martin.sandsmark, myriam
Priority:	NOR
Version:	4.6.0
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	phonondevicesrc

Description Ralf Engels 2011-02-22 10:30:36 UTC

Version:           4.6 (using KDE 4.6.0) 
OS:                Linux

The "Removed Sound Devices" dialog pops up every time I start KDE even if I check "Do not ask again for these devices"

Regression from 4.5

Reproducible: Always

Steps to Reproduce:
- Have some sound devices that KDE considers removed.
- Start KDE
- In the "Removed Sound Devices" dialog check "Do not ask again for these devices"
- Click "No" so that KDE won't remove the devices
- Start KDE again

Actual Results:  
The dialog is shown again.

Expected Results:  
The dialog is not shown again.

In cases where this is hard to debug I can add debug output in KDE as I finally managed to build my own version.

Comment 1 Harald Sitter 2011-03-02 03:10:40 UTC

Sounds like a weird transition issue WRT to solid's uuid actually.

Please paste your phonondevicesrc.

Comment 2 Ralf Engels 2011-03-02 20:37:36 UTC

Created attachment 57617 [details]
phonondevicesrc

Comment 3 Ralf Engels 2011-03-02 20:39:11 UTC

file is attached.

Note: the problem is not that I have unused audio devices.
The problem is that the dialog shows up every time even though I selected "don't show".

Comment 4 Myriam Schweingruber 2012-03-07 08:19:24 UTC

*** Bug 280104 has been marked as a duplicate of this bug. ***

Comment 5 Myriam Schweingruber 2013-04-13 09:16:13 UTC

*** Bug 317329 has been marked as a duplicate of this bug. ***

Comment 6 Ben Cooksley 2013-06-30 10:45:40 UTC

Removing subscriber from bug report per abuse report.

Comment 7 Harald Sitter 2013-07-04 11:43:35 UTC

tldr: shouldn't happen with PA anymore, probably an alsa upstream problem.

I can reproduce this with alsa userspace 1.0.25 and KDE/4.10. This is in fact a very precise issue (other than some of the others regarding phononserver). For some reason Phonon doesn't get the correct name from libsolid and since Phonon caches devices by name it thinks stuff changed.

In particular for me suddenly the UDI was used rather than a readable name essentially making phononserver think that all devices were removed. Equally the next time it would get non-UDI names it would again think all devices were removed. So in the end there is a endless loop between name identificiation. Having briefly looked at libsolid's code I do believe this issue may be caused by libasound itself and since we know there are some reentrancy issues with .25 that does not seem like an unlikely cause. It's really hard to debug this reliably though, so I guess the best way would be to wait for alsa userspace .27 and check again.

At any rate I added some additional debug output to master that should help with finding it out what goes on when phononserver decides that a device was "removed".

Comment 8 Justin Zobel 2021-03-09 22:36:53 UTC

Thank you for the bug report.

As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists.

If this bug is no longer persisting or relevant please change the status to resolved.