QjackCtrl 服务器正在启动。然后声卡的 FW Active LED 亮起。我尝试收听 Youtube 视频，但没有输出声音。卡连接设置在 Windows 上正常运行。
设置：
Ubuntu 11.10 X64/ QjackCtrl/Ubuntu Studio 控件/ Focusrite Saffire PRO40
以下是来自 QjackCtrl 的日志：
19:30:14.614 Patchbay deactivated.
19:30:14.698 Statistics reset.
19:30:14.735 ALSA connection change.
19:30:14.977 D-BUS: Service is available (org.jackaudio.service aka jackdbus).
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
19:30:14.984 ALSA connection graph change.
19:30:46.140 D-BUS: JACK server is starting...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: driver "firewire" selected
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Saving settings to "/home/richard/.config/jack/conf.xml" ...
Sun Mar 18 19:30:44 2012: Starting jack server...
Sun Mar 18 19:30:44 2012: JACK server starting in non-realtime mode
Sun Mar 18 19:30:44 2012: [1m[31mERROR: Cannot lock down memory area (Cannot allocate memory)[0m
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
19:30:46.552 D-BUS: JACK server was started (org.jackaudio.service aka jackdbus).
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 1_in'
Sun Mar 18 19:30:46 2012: New client 'firewire_pcm' with PID 0
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 2_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 3_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 4_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 5_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 6_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 7_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_IP 8_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_SPDIF L_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_SPDIF R_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_midi 0_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 1_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 2_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 3_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 4_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 5_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 6_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 7_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 8_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Loop 1_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Loop 2_in'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Mon 1_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Mon 2_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 3_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 4_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 5_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 6_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 7_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 8_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 9_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_Line 10_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_SPDIF L_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_SPDIF R_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_midi 0_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 1_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 2_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 3_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 4_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 5_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 6_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 7_out'
Sun Mar 18 19:30:46 2012: graph reorder: new port 'firewire_pcm:00130e0401400d6b_ADAT 8_out'
19:30:48.759 JACK connection change.
19:30:48.761 Server configuration saved to "/home/richard/.jackdrc".
19:30:48.765 Statistics reset.
19:30:48.775 Client activated.
19:30:48.780 JACK connection graph change.
Cannot lock down memory area (Cannot allocate memory)
Sun Mar 18 19:30:48 2012: New client 'qjackctl' with PID 2138
19:33:24.467 XRUN callback (1).
19:37:36.111 XRUN callback (2).
19:38:08.115 XRUN callback (3).
19:38:42.392 XRUN callback (4).
19:38:49.831 XRUN callback (5).
19:39:13.111 XRUN callback (6).
19:43:01.703 XRUN callback (7).
我尝试了很多不同的内存设置，因为日志说它无法获得锁定。此外，如果勾选了 RealTime 选项，服务器也无法启动。服务器启动后，系统变得不稳定。如果我尝试停止服务器，卡上的 FW 活动 LED 会关闭，然后 QjackCtrl 会冻结。
非常感谢您的意见！
答案1
您的用户帐户需要位于系统组音频中。请在系统工具中检查组和用户。一些覆盖还会创建一个名为 jack 或 jack-users 的组，也请检查这些组，不用担心：无需加入这些组之一也不会有什么坏处 ;-)
关于声音本身：
您检查过混音器设置吗？ 有些设备受 支持ffadomixer，但 Focusrite-Gear 的支持程度相当高……