こんにちは。jackに関する質問です。タイトルの通りQjackctlからサーバーを開始しようとしてもエラーが出てしまいます。

ターミナルからqjackctlを起動するとコンソールに以下の文が表示されます。
21:03:45.863 統計のリセット。
21:03:45.880 ALSAのコネクションは変更されました。
Cannot connect to server socket err = 接続を拒否されました
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
21:03:45.954 ALSA接続グラフは変更されました。

開始ボタンを押すと以下の文が表示されます。

21:04:55.100 JACKを開始しています...
21:04:55.101 /usr/bin/jackd -ndefault -v -r -dalsa -dhw:I82801AAICH,0 -r44100 -p1024 -n3
Cannot connect to server socket err = 接続を拒否されました
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
21:04:55.174 JACKはプロセスID=4142で開始しました。
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
Cannot create RT messagebuffer thread: Operation not permitted (1)
Retrying messagebuffer thread without RT scheduling
Messagebuffer not realtime; consider enabling RT scheduling for user
no message buffer overruns
jackdmp 1.9.11
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2014 Grame.
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 non-realtime mode
self-connect-mode is "Don't restrict self connect requests"
Cannot lock down 82274202 byte memory area (Cannot allocate memory)
Jack: JackPosixThread::StartImp : create non RT thread
Jack: JackPosixThread::ThreadHandler : start
Jack: playback device hw:I82801AAICH,0
Jack: capture device hw:I82801AAICH,0
Jack: apparent rate = 44100
Jack: frames per period = 1024
Jack: JackDriver::Open capture_driver_name = hw:I82801AAICH,0
Jack: JackDriver::Open playback_driver_name = hw:I82801AAICH,0
Jack: Check protocol client = 8 server = 8
Jack: JackEngine::ClientInternalOpen: name = system
Jack: JackEngine::AllocateRefNum ref = 0
Jack: JackPosixSemaphore::Allocate name = jack_sem.1000_default_system val = 0
Jack: JackEngine::NotifyAddClient: name = system
Jack: JackGraphManager::SetBufferSize size = 1024
Jack: JackConnectionManager::DirectConnect first: ref1 = 0 ref2 = 0
Jack: JackGraphManager::ConnectRefNum cur_index = 0 ref1 = 0 ref2 = 0
Jack: JackDriver::SetupDriverSync driver sem in flush mode
audio_reservation_init
dbus_bus_request_name() failed. (1)
Failed to acquire device name : Audio0 error : Connection ":1.147" is not allowed to own the service "org.freedesktop.ReserveDevice1.Audio0" due to security policies in the configuration file
Audio device hw:I82801AAICH,0 cannot be acquired...
Jack: ~JackDriver
Cannot initialize driver
Jack: no message buffer overruns
Jack: JackPosixThread::ThreadHandler : exit
Jack: JackPosixThread::Stop
JackServer::Open failed with -1
Jack: Succeeded in unlocking 82274202 byte memory area
Jack: JackShmMem::delete size = 0 index = 0
Jack: ~JackDriver
Jack: Succeeded in unlocking 1186 byte memory area
Jack: JackShmMem::delete size = 0 index = 1
Jack: Cleaning up shared memory
Jack: Cleaning up files
Jack: Unregistering server `default'
Failed to open server
21:04:55.422 JACKは終了しました
21:04:57.239 JACKサーバーとクライアントとして接続することができませんでした。 - 操作全体が失敗しました。 - サーバーに接続することができません。 メッセージウィンドウで詳細な情報を確認して下さい。
Cannot connect to server socket err = 接続を拒否されました
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock

同じくQjackctlでサーバーが起動できない質問に設定->Advance->名前の(default)の括弧を外すという対処が紹介されていましたが、解決できませんでした。
https://forums.ubuntulinux.jp/viewtopic.php?id=18377

Ubuntuのバーションは16.04,環境はwindowsPCのVirtualBox上でゲストOSとして起動させています。
何か対処法の見当がつく方がいらっしゃいましたらご教授いただければ幸いです。よろしくおねがいします。