[SRU] buffer size and sample rate no longer updates

[Erich Eickmeyer]

[Impact]

ubuntustudio-installer now contains a separate application for configuring the audio subsystem, which may in the future be spun-off into its own binary package. Initially, it was meant to simply switch systems between the PipeWire and the legacy PulseAudio/JACK configuration (an installer function). However, it became clear that it needed to be able to configure the PipeWire configuration as well.

This used to be as simple as changing the PIPEWIRE_QUANTUM environment variable with a logout/in, but this changed with the version of PipeWire in Mantic and required a somewhat higher level of complexity involving the `pw-metadata` command. This was not foreseen before release.

This also requires a systemd user service that applies these settings at login, also part of this change.

[Test Case]

With Ubuntu Studio installed:

 * Open Patchance
 * Note the sample rate and buffer (1024/48000 is the default)
 * Go to Ubuntu Studio Audio Configuration
 * Change the sample rate and buffer to something like 512 96000
 * Log out and in
 * Open Patchance
 * Note the sample rate and buffer *HAS NOT CHANGED* <- This is the problem
   ** Expected result is that it did change

[What could go wrong]

The only regression here is that in order to change the buffer size and sample rate, people will have to go back to the Audio Configuration utility to do so as opposed to whatever interface they are in, but the plus side is that it will no longer require a relog.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntustudio-installer - 1.10

---------------
ubuntustudio-installer (1.10) noble; urgency=medium

  * Fix for variable no longer setting latency or samplerate (LP: #2043214)

 -- Erich Eickmeyer <email address hidden> Fri, 10 Nov 2023 06:37:53 -0800

[Steve Langasek (vorlon)]

Hello Erich, or anyone else affected,

Accepted ubuntustudio-installer into mantic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntustudio-installer/1.9.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-mantic to verification-done-mantic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-mantic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Erich Eickmeyer (eeickmeyer)]

Tested on Ubuntu Studio 23.10 using ubuntustudio-installer 1.9.1 from mantic-proposed:

 * Opened Patchance
 * Noted the sample rate and buffer at 1024/48000
 * Opened Ubuntu Studio Audio Configuration
 * Changed the sample rate to 512 96000
 * Change took effect immediately

Problem is resolved.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntustudio-installer - 1.9.1

---------------
ubuntustudio-installer (1.9.1) mantic; urgency=medium

  * No-change backport to mantic.

ubuntustudio-installer (1.10) noble; urgency=medium

  * Fix for variable no longer setting latency or samplerate (LP: #2043214)

 -- Erich Eickmeyer <email address hidden> Fri, 10 Nov 2023 07:01:23 -0800

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for ubuntustudio-installer has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.