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Message #10873
[Bug 1969827] Update Released
The verification of the Stable Release Update for studio-controls 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.
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https://bugs.launchpad.net/bugs/1969827
Title:
Studio Controls doesn't actually switch to FFADO
Status in studio-controls package in Ubuntu:
Fix Released
Status in studio-controls source package in Jammy:
Fix Committed
Bug description:
[Impact]
* Users of Studio Controls, specifically Ubuntu Studio users using
Firewire audio interfaces, are running into issues where using Studio
Controls to switch to the FFADO driver as provided by libffado (as
opposed to the ALSA firewire driver) are unable to do so.
* The dropdown menu in Studio Controls that switches between the two
is supposed to add a blacklist item into /etc/modprobe.d to blacklist
the ALSA Firewire driver, which is in direct conflict with the FFADO
driver required by some Firewire audio interfaces and must be
blacklisted. Currently, this dropdown menu has no effect.
* The uploaded package fixes this by refactoring the copying
mechanism. This has already been fixed in a future release of Studio
Controls.
[Test Plan]
* Launch Studio Controls
* In the System Tweaks tab, switch "FireWire Module select (reboot to
switch):) menu to "Use FFADO FireWire Modules"
* Reboot
* Login, launch Studio Controls
* Notice FireWire Module Select is back on ALSA.
* 'ls /etc/modprobe.d/' will not show 'blacklist-studio.conf'
* Expected behavior: FireWire Module select should be on FFADO and
'blacklist-studio.conf' should exist in '/etc/modprobe.d/'
[Where problems could occur]
* Although great care has been taken to avoid this, the 'blacklist-studio.conf' file could get stuck and remain blacklisting ALSA firewire modules. If this does cause such a regression, a further upload will fix this. However, this is unlikely as it merely invokes code that was not being invoked before that already existed as this is merely correcting a regression.
[Other Info]
* Original Description:
Choosing the drop-down to switch the FireWire module from ALSA to
FFADO doesn't appear to actually do anything.
No blacklist-studio.conf file ever gets created in /etc/modprobe.d.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: studio-controls 2.3.1-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-24.24-lowlatency 5.15.30
Uname: Linux 5.15.0-24-lowlatency x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Apr 21 20:07:06 2022
InstallationDate: Installed on 2022-04-20 (1 days ago)
InstallationMedia: Ubuntu-Studio 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1)
PackageArchitecture: all
SourcePackage: studio-controls
UpgradeStatus: No upgrade log present (probably fresh install)
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References