Works in cinnamon, same boot, same user.
(After the above i just logged out of plasma and into cinnamon)

Source RPM: (none) => plasma something...
CC: (none) => mageia

... and now I logged out of cinnamon and into plasma, and sound works!
Both in firefox, and plasma settings test button!

Something plasma should initialise but dont, and cinnamon do?

The weird wrong path still appear in log like in comment 0, and maybe should be fixed anyway?

This test was on the T60 which is a production machine i do not want to post whole the log from, but ask if you need something, and i can also test on T43.

Reboot, and into plasma directly, sound is OK now.
This is weird.  I did not do anything, no update, no setting, just logged into cinnamon and it repaired something...?

My daughter humbly noted me that sound ceased after i updated and rebooted her T61 a week or so ago.

And that is in * MATE *   Yes i verified the MATE sound settings test produce no sound, but also no error message.

That system too have several DE, among them Plasma.  So i logged out of MATE, into Plasma just to check.  SURPRISE: there is sound!  Logged out and into MATE, and sound OK there too now.  And sound survives reboot and suspend-resume.

So no blame on plasma.

But something broke because an update. (and also after reboot of it)
And that something is repaired by *changing* DE.
What initialisations are done then, that should have been done after an update? 

(Sidenote: that wrong path logged when using Plasma systemsettigns sound check is logged on this system too - plus like on the other machines quite a lot other error messages from plasma, but it works still...)


Then there is my T43, which was fresh installed with only Plasma yesterday and sound is broken.  I guess from the above experience it will be fixed if i install cinnamon and change to it and back, but i leave it as is for a while if someone have an idea what i can test to track this down.

Source RPM: plasma something... => (none)
Summary: Plasma sound broke recently on thinkpads T43 and T60 => Sound broke recently on thinkpads T43, T60, T61 - get repaired by changing DE

Assigning to all packagers for now as I'm not sure what would be the culprit - CC'ing kernel and drivers maintainers in case they have ideas on how to debug this.

CC: (none) => kernel
Assignee: bugsquad => pkg-bugs
Severity: normal => major
Priority: Normal => High

More observations the freshly installed T43 i586 Plasma + updates ( and openshot-qt + deps ) :

--- A) 

No sound in programs and systemsettings Test button at section "sound and video" leftmost tab make no sound but stay in for the expected duration. Left and Right buttons in the center tab also do not work.  No error popups at all.
Rightmost tab tell Backend = Phonon VLC

--- B)

In section "sound volume" Leftmost tab "Progr..." sound active programs are listed, each with a slider and mute button. On this machine before any program use sound, Alsa is listed (seem strange to me)
  ALSA plug-in [python3.5m]: ALSA Playback
When i start Firefox to play video, alsa vanishes to never be seen.  Firefox with slider is shown as long as it is playing, not muted but no sound.  When i close firefox nothing is displayed here.

Difference noted: On working system (i.e T61 fixed by changing DE):
1) i do never see Alsa there.
2) system sound is always in the list

--- C)

The middle tab "output devices" list "built in analog stereo", and i can set port to "Earphones / Amplifier" or "Earphones / No amplifier". Slider is set at 100% and also here is a mute button.  I leave it non muted.
No sound in neither loudspeakers nor headphone in either setting.

Difference noted: On the working system:
1) the alternatives are "Loudspeaker" (default) and "Earphones"
Earphones: always sound in earphones, never Loudspeakers. Loudspeaker=automatic change to earphones when plugged in.  Works.

Created attachment 9387 [details]
T43 fresh install no sound: lspci -v, rpm -qa|sort, journalctl -xb

Attach an archive of 3 files; current outputs of:
* lspci -v
* rpm -qa|sort
* journalctl -xb

Testing to see what makes it work this time:

1) updated plasma-workspace (as it was available in testing) + reboot
-> ALSA (see B in comment 6), not visible, but also never system sound item.  Still no sound, and C) as before. (cant select loudspeaker, and no signal in earphone jack either)

2) installed task-xfce-minimal, reboot, log into it
-> still no sound.  B) and C) same as in 1)
Hint: the volume meter in xfxe sound thingy (opened from the icon in systray) is a live when i play video in firefox, so the signal goes that far.
2b) logged out and into plasma
-> still no sound

3) installed task-cinnamon-minimal, reboot, log into it
-> still no sound
3b) reboot, log into plasma
-> still no sound

sigh... i expected that to work according to comment 2, but that computer had full cinnamon, much more programs, other hardware.  Same DM.

Comparing to another T43 computer (note to self: Klara) that runs mga5 KDE with working sound: it use all the same settings, including it do not have a choice "speaker" but sucessfully use "Earphones / Amplifier" (see C in comment 2)

Disc swap experiment: swapped disks between the two T43: 
-> the mga5 sound works in the other machine too, so hardware have not broken.
The disk with mga6 got "No operating system found" in the other T43. Swapped it back and it worked once, next power on it fail there too, now with tick-tick-tick-tic sound = kind of dead...  Oh crap.

And i who just almost got a dual boot W7/mga6 working on it.

%&@@¤§!-{""!#¤}!!

Over and out
... into the garden i go.

Hi,
This is High priority bug for a good reason.

Making Mageia even better than ever is best direction.
In order to do right thing, this bug should be examined and fixed as soon as possible.

Packagers, please make the status to Assigned when you are working on this.
Feel free to reassign the bug if bad-triaged. Also, if bug is old, please close it.

On October 1st 2020, we will drop priority to normal.

Sorry forgot aboput this.
I installed on another T43 this spring, Plasma, and no problem there.

Status: NEW => RESOLVED
Resolution: (none) => FIXED