Comment # 28 on bug 917411 from Takashi Iwai

(In reply to macias - from comment #27)
> > If it happens during media playback,
> 
> Never when watching a movie, only (if) listening to some music. So there was
> no displaying video involved.

The video is always involved as long as the device exists, no matter whether
you see it or not.  But, for checking whether it's really an audio issue, it's
simpler.  Try blacklist the audio driver (snd-hda-intel) and test without audio
for a while whether you get the same problem.

> > a suspected culprit is the video driver, of course.  What video driver are you 
> > using?
> 
> How do I check this?

Check for "VGA".

> 01:00.0 VGA compatible controller: NVIDIA Corporation G96 [GeForce 9400 GT]
> (rev a1)

So it's Nvidia.  Are you using nouveau driver, or nvidia binary-only driver?
In either way, it's too bad for debugging.  It's almost impossible to debug
these (especially without logs).

> > Did you ever test with a newer upstream kernel (3.18 / 3.19)? 
> 
> As I wrote, yes, those 2-3 last freezes was on 3.19 in debug mode.

OK.

> > Also, what about the newer openSUSE-13.2 kernel in OBS Kernel:openSUSE-13.2 
> > repo?
> 
> What do you mean, there is something even newer than 3.19? I can only see
> 3.16 there.
> 
> http://download.opensuse.org/repositories/Kernel:/openSUSE-13.2/standard/
> x86_64/

No, I asked it just because I couldn't find any text you were testing with 3.19
for the final results.

> How to turn back dmesg to its default level? I.e. I know how to set it, I
> don't what level of messages was the default on installation.

Just drop the dmesg command you added.