在过去的几周里，Studio Controls v2.2.1-0 无法在 Ubuntu Studio 20.04.3 中执行。反向移植 ppa 已启用。Jack 似乎没有运行。我仍有声音（来自 Pulse Audio？），但 Jack 未作为 Audacity 中的选项出现。它也没有出现在系统托盘音频混音器中。任何有关故障排除的建议都值得赞赏。
$ apt show studio-controls
Package: studio-controls
Version: 2.2.1-0ubuntu1~ubuntu20.04.1~ppa1
Priority: optional
Section: admin
Maintainer: Erich Eickmeyer
Original-Maintainer: Len Ovens
Installed-Size: 461 kB
Depends: a2jmidid, jackd2, pulseaudio-module-jack, python3-dbus, python3-gi, python3, python3-jack-client, zita-ajbridge, qasmixer, pavucontrol, python3-alsaaudio, init-system-helpers (>= 1.52)
Recommends: qmidinet, zita-njbridge
Suggests: carla
Conflicts: cadence, studio-controls (<= 2.0.9-0ubuntu1), ubuntustudio-controls (<< 1.13)
Replaces: studio-controls (<= 2.0.9-0ubuntu1), ubuntustudio-controls (<< 1.13)
Download-Size: 96.1 kB
APT-Manual-Installed: yes
APT-Sources: http://ppa.launchpad.net/ubuntustudio-ppa/backports/ubuntu focal/main amd64 Packages
Description: Studio Controls - Jack Audio Configuration Tool
Studio Controls is a small application that enables/disables realtime
privilege for users and controls jackdbus. It allows Jackdbus to be run from
session start. It also will detect USB audio devices getting plugged in after
session start and optionally connect them to jackdbus as a client or switch
them in as jackdbus master.
您可能还对以下内容感兴趣：
studio-controls
install path: /usr
Config file: /home/user/.config/autojack/autojack.json
Traceback (most recent call last):
File "/usr/bin/studio-controls", line 1836, in <module>
us = StudioControls()
File "/usr/bin/studio-controls", line 602, in __init__
self.refresh_dropdowns()
File "/usr/bin/studio-controls", line 888, in refresh_dropdowns
desc_base = f"{this_dev} {dev_db['id']} {dev_db['bus']} {dev_db['raw']},{this_sub},0"
KeyError: 'id'
系统更新刚刚将 Studio Controls 更新至 v2.2.3-0，但并未解决上述问题。Studio Controls 仍然无法启动/执行。
$ studio-controls
install path: /usr
Config file: /home/user/.config/autojack/autojack.json
Traceback (most recent call last):
File "/usr/bin/studio-controls", line 1836, in <module>
us = StudioControls()
File "/usr/bin/studio-controls", line 602, in __init__
self.refresh_dropdowns()
File "/usr/bin/studio-controls", line 888, in refresh_dropdowns
desc_base = f"{this_dev} {dev_db['id']} {dev_db['bus']} {dev_db['raw']},{this_sub},0"
KeyError: 'id'
如果我启动 Ubuntu Studio 20.0.4 的实时 CD，Studio Controls 就可以正常启动。