[ubuntu-studio-users] Audio pop/glitch/crackle issues

[mario buoninfante]

Hi Roy,

Unfortunately that didn't work for me.
I managed to get rid of the audio crackle thing downgrading the kernel 
(there's a known bug introduced with 5.13.xxxx - see my previous post here).
I still get too many x-runs though, but I started thinking that it might 
have to do with my AMD FirePro W2100 GPU.

Just a guess atm.

While trying to get to the bottom of my initial issue, I also installed 
the AMD drivers for my GPU and that improved the audio performance 
massively. No glitches/distortions even with low buffer sizes, but my 
video was really sluggish.
On the internet I didn't manage to find any report with mine exact 
conditions, but I found few posts here and there of people having "audio 
issues" introduced by (the lack of?) AMD drivers.

I'll keep the list updated in case I get anywhere with this.

Cheers,
Mario



On 11/12/2022 14:52, Roy Damen wrote:
> Hello Mario, i wonder if you could just do the UbuntuStudio-controls 
> config again. This fixed issues on my machine,
>
> Good luck,
>
> Roy Damen
>
>
> Op za 10 dec. 2022 om 00:33 schreef mario buoninfante 
> <mario.buoninfante at gmail.com>:
>
>     I think I might have found the issue
>
>     https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1966066
>
>
>     On 04/12/2022 12:11, mario buoninfante wrote:
>>
>>     Hi,
>>
>>     Here's a bit more info and some updates.
>>     I'm running Xubuntu 22.04.1 with Ubuntu Studio (everything
>>     installed).
>>     I'm using a Focusrite Clarett 8pre USB as audio device running at
>>     96kHz sample rate, 256 sample buffer size and 3 JACK period.
>>     I'm fully up-to-date and the kernel is Linux 5.15.0-56-lowlatency
>>     x86_64 (I think the kernel got updated in the last round of updates).
>>
>>     In the last 2 days I unsuccessfully tried to do the following (in
>>     non-particular order):
>>
>>      *
>>
>>         uninstall pipewire - too many dependencies, so I gave up on that
>>
>>      *
>>
>>         the combo
>>
>>          o
>>
>>             systemctl --user stop pipewire.socket && systemctl --user
>>             stop pipewire.service
>>
>>          o
>>
>>             systemctl --user mask pipewire.service
>>
>>      *
>>
>>         re-install pulse audio
>>
>>       * in /etc/pulse/default.pa <http://default.pa> I added
>>         "tsched=0" to the line containing "load-module
>>         module-udev-detect"
>>      *
>>
>>         edit the files in /etc/pipewire/media-session.d adding:
>>
>>          o
>>
>>             session.suspend-timeout-seconds = 0
>>
>>      *
>>
>>         install pipewire-pulse
>>
>>      *
>>
>>         replace pipewire-session-manager with wireplumber
>>
>>      *
>>
>>         re-install pipewire-session-manager and remove wireplumber
>>         (this is actually the last thing I tried, so now I don't have
>>         wireplumber anymore)
>>
>>
>>     Nothing helped.
>>     Then, after using:
>>
>>      *
>>
>>         systemctl --user status pipewire pipewire-session-manager
>>
>>     I realised I was getting 2 errors:
>>
>>      *
>>
>>         mod.rt: could not set nice-level to -11: Permission denied
>>
>>      *
>>
>>         spa.v4l2: '/dev/video0' VIDIOC_QUERYCTRL: Input/output error
>>
>>     I fixed the former adding
>>
>>         |@audio - nice -20|
>>
>>     to /etc/security/limits.d/audio.conf
>>
>>     I didn't manage to address the latter though.
>>
>>
>>     The situation seems to have improved, not so much with streamed
>>     audio/video, but with audio only (eg audacious) - it might be too
>>     early to assess this though, since it was a late night move.
>>
>>     I went from "totally unusable - glitches, pops and crackles 80%
>>     of the played audio", to "getting pops and crackles sporadically".
>>     Still makes my system unusable, since I mainly record/mix/produce
>>     music on my computer, but all improvements are welcome!
>>
>>     With audio/video from the internet though (mainly YouTube via
>>     Firefox), I'm still getting terrible performance out of this.
>>
>>
>>     Cheers,
>>     Mario
>>
>>
>>
>>
>>
>>
>>
>>     On 02/12/2022 21:09, mario buoninfante wrote:
>>>     Hi,
>>>
>>>     Recently I started having issues with the audio performance of
>>>     my system (Ubuntu 22.04.1 LTS).
>>>     It seemed to have started after my last update.
>>>     Simply running "top" I noticed I have "pipewire" running and I
>>>     was wondering if that could be the problem.
>>>     I don't know if that has always been installed as I never
>>>     checked before today, but I found online that several people are
>>>     having similar issues both on Ubuntu and Fedora.
>>>
>>>     Any feedback/recommendation is welcome :)
>>>
>>>     Cheers,
>>>     Mario
>>>
>>>
>>>
>>     -- 
>>     ---
>>     musician, QA engineer, mental health first aider MHFA England
>>
>>     https://isoneph.bandcamp.com/
>>     https://vdof.bandcamp.com/
>>     http://mbuoninfante.tumblr.com
>>     https://vimeo.com/creativecodingsalerno
>>     https://github.com/mariobuoninfante
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