LMMS不会在raspberry pi 4b上运行Ubuntu 21.04

Question

两到三天前开始的。我在我的raspberry pi 4b上安装了ubuntu21.04，并在上面安装了it。它运行得很好，但有一天，我尝试从脉冲音频切换到作为音频服务器的jackd2。我把延迟降到了最低限度。(我本想展示一张截图，但lmms却不起作用。)它显示启动屏幕，但现在不显示gui。有时会弹出一个错误窗口，上面写着"ubuntu有一个内部错误“，另一个窗口说"lmms意外关闭了”。它并不是每次我试一次就这样做的；有时它什么也没有显示出来。只是没提到那个家伙。我尝试通过终端启动lmms，这些是它生成的错误日志。

pi@pi-raspberrypi:~$ lmms
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Notice: could not set realtime priority.
Cannot connect to server socket err = Connection refused
Cannot connect to server request channel
jackdmp 1.9.17
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
Copyright 2016-2021 Filipe Coelho.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback
Cannot use real-time scheduling (RR/10) (1: Operation not permitted)
AcquireSelfRealTime error
Cannot use real-time scheduling (RR/5) (1: Operation not permitted)
JackClient::AcquireSelfRealTime error
JackEngine::XRun: client = lmms was not finished, state = Running
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = lmms was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
Destination port in attempted (dis)connection of system:playback_2 and  is not an input port
Segmentation fault (core dumped)
pi@pi-raspberrypi:~$ Destination port in attempted (dis)connection of system:playback_2 and  is not an input port
JackGraphManager::Disconnect: port_src = 10 not used name = 
Input port index = 10 not found for application ref = 2
Unknown error...
terminate called after throwing an instance of 'Jack::JackTemporaryException'
  what():  

我重新安装了几种不同的方式，比如通过终端使用snap，通过sotre，以及通过apt终端，它也有同样的问题。知道该怎么做才能修好它吗？好像是因为杰克安装错了。我试着重新安装我能找到的所有jack、libjack和find包，但还没有修复。

Answer 1

我修好了！我清除了所有的jack、jackd和libjackd包；lmms现在只是让我尝试一下音频服务器。我选择了音频服务器，它可以正常工作。这似乎是一个内部的小故障，我删除了一些东西。这不是一个很干净的解决办法，对我来说也没什么意义。但它解决了问题。(它至少让lmms工作，如果它没有修复它，但只是绕过它)，它现在工作完美，这才是最重要的。