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Accepted
Al Lelopath
Asked: 2020-07-15 15:15:49 +0800 CST

启动 qjackctl 时出错

  • 772

我开始qjackctl看到这个：

qjackctl

连接
RT在闪烁，那里很好。虽然没有音频，例如在浏览器中的 YouTube 上。以下是启动时消息窗口中的文本qjackctl

看起来杰克没有运行，所以它然后启动它。在运行 qjackctl 之前，我是否需要显式启动 jack（或者最好这样做）？

然后有一些错误信息：

    Tue Jul 14 17:01:01 2020: ERROR: Cannot lock down 82280346 byte memory area (Cannot allocate memory)
Tue Jul 14 17:01:01 2020: ERROR: control open "hw:USB" (No such device)
Tue Jul 14 17:01:01 2020: ERROR: ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
Tue Jul 14 17:01:01 2020: ERROR: Cannot use real-time scheduling (RR/10)(1: Operation not permitted)
Tue Jul 14 17:01:01 2020: ERROR: AcquireSelfRealTime error
Cannot lock down 82280346 byte memory area (Cannot allocate memory)

是否需要解决这些问题？

17:04:32.446 Statistics reset.
17:04:32.451 ALSA connection change.
17:04:32.479 D-BUS: Service is available (org.jackaudio.service aka jackdbus).
17:04:32.516 D-BUS: JACK server is starting...
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
17:04:32.539 D-BUS: JACK server was started (org.jackaudio.service aka jackdbus).
Tue Jul 14 17:04:32 2020: Starting jack server...
Tue Jul 14 17:04:32 2020: JACK server starting in realtime mode with priority 10
Tue Jul 14 17:04:32 2020: self-connect-mode is "Don't restrict self connect requests"
Tue Jul 14 17:04:32 2020: ERROR: Cannot lock down 82280346 byte memory area (Cannot allocate memory)
Tue Jul 14 17:04:32 2020: ERROR: control open "hw:USB" (No such device)
Tue Jul 14 17:04:32 2020: Acquired audio card Audio2
Tue Jul 14 17:04:32 2020: creating alsa driver ... hw:PCH|hw:USB|128|2|44100|0|0|nomon|swmeter|-|32bit
Tue Jul 14 17:04:32 2020: ERROR: ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
Tue Jul 14 17:04:32 2020: configuring for 44100Hz, period = 128 frames (2.9 ms), buffer = 2 periods
Tue Jul 14 17:04:32 2020: ALSA: final selected sample format for playback: 32bit integer little-endian
Tue Jul 14 17:04:32 2020: ALSA: use 2 periods for playback
Tue Jul 14 17:04:32 2020: ERROR: Cannot use real-time scheduling (RR/10)(1: Operation not permitted)
Tue Jul 14 17:04:32 2020: ERROR: AcquireSelfRealTime error
Tue Jul 14 17:04:32 2020: graph reorder: new port 'system:playback_1'
Tue Jul 14 17:04:32 2020: New client 'system' with PID 0
Tue Jul 14 17:04:32 2020: graph reorder: new port 'system:playback_2'
Tue Jul 14 17:04:34 2020: Saving settings to "/home/mickeydog/.config/jack/conf.xml" ...
17:04:34.735 JACK connection change.
17:04:34.736 Server configuration saved to "/home/mickeydog/.jackdrc".
17:04:34.736 Statistics reset.
17:04:34.739 Client activated.
17:04:34.740 Patchbay deactivated.
17:04:34.756 JACK connection graph change.
Cannot lock down 82280346 byte memory area (Cannot allocate memory)
Tue Jul 14 17:04:34 2020: New client 'qjackctl' with PID 3514

-- 编辑 -- 设置输入设备后，错误为：

Wed Jul 15 07:55:00 2020: ERROR: Cannot lock down 82280346 byte memory area (Cannot allocate memory)
Wed Jul 15 07:55:00 2020: ERROR: Cannot use real-time scheduling (RR/10)(1: Operation not permitted)
Wed Jul 15 07:55:00 2020: ERROR: AcquireSelfRealTime error

关于限制，有一个文件/etc/security/limits.d/audio.conf.disabled包含：

@audio   -  rtprio     95
@audio   -  memlock    unlimited
#@audio   -  nice      -19

还有一个文件/etc/security/limits.conf，其中所有的行都被注释掉了，即以#开头

这是启动 PulseAudio 后的系统声音设置。如果 PulseAudio 未运行，则“输出”选项卡中没有任何内容。

设置

我试过这个：

sudo dpkg-reconfigure -p high jackd

这似乎没有效果

通过更改名称删除了最后 3 个错误audio.conf.disabled：

cd etc/security/limits.d
sudo cp audio.conf.disabled audio.conf
sudo rm audio.conf.disabled

质量混合器：

混音器

sound jack

1 个回答

  1. Best Answer

    • 不需要在 qjackctl 之前启动 jackd ，但它是可能的
      jackd -d alsa -d hw:0 &

    • 您在 qjackctl 高级音频配置中有错误设置：
      hw:PCH 用于播放（这没关系），但 hw:USB 用于录制，
      hw:USB 不存在 : ERROR: control open "hw:USB" (No such device))：
      通常第一个音频设备是hw:0，
      第二个音频设备是hw:1
      （或者可能保存配置后是否删除了 USB 设备？）

    • 实时调度错误可能是由以前的错误引起的，或者是由于您的用户缺少对 limits.conf 的修改，请参见此处。

    • Firefox 或 Chrome 中没有声音：正常，因为他们使用已禁用的 pulseaudio（我猜）。可以使用 jackd 和 pulseaudio，但首先 jackd 必须没问题。

    • 对于 midi，尝试通过在每一侧选择一个客户端来将输入连接到输出，然后单击“连接”

    • 3

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