Hi,
I have *Ubuntu 20.04* hosted on *HP elite book G8 (i7 1185G7)* and *Windows
10 guest* through kvm. I need to connect a *Thunderbolt audio device
(Presonus Quantum)* to windows. I did it using a virtual machine manager
(found an audio device using lspci and added it to the machine in VM
manager). I installed the official device driver in windows and the device
is recognized and working.
However, the audio device causes *regular freezing of windows 10 guest*
(linux is still working). Freezes can be a few seconds to few minutes,
sound output is buzzing and windows is unresponsive. Then it suddenly
unfreezes, works for a few seconds and then again freezes. Currently only
key for me is one error message from audio device driver (it's windows
desktop application), that appears after unfreezing: *"The audio engine has
been stopped, because the system became unresponsive due to an overload in
the audio engine".*
Some additional info:
*lspci:*
...
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device a0a4 (rev 20)
2b:00.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low
Power) [Alpine Ridge LP 2016] (rev 01)
2c:00.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low
Power) [Alpine Ridge LP 2016] (rev 01)
2c:01.0 PCI bridge: Intel Corporation JHL6240 Thunderbolt 3 Bridge (Low
Power) [Alpine Ridge LP 2016] (rev 01)
2d:00.0 Multimedia audio controller: Device 1c67:0104 # this is Presonus
Audio Device
...
*boltctl*
● PreSonus Audio Electronics Quantum 2626
├─ type: peripheral
├─ name: Quantum 2626
├─ vendor: PreSonus Audio Electronics
├─ uuid: 00565981-157d-3c00-ffff-ffffffffffff
├─ status: authorized
│ ├─ domain: d065ce53-4e96-8780-ffff-ffffffffffff
│ └─ authflags: none
├─ authorized: Št 18. november 2021, 09:05:59
├─ connected: Št 18. november 2021, 09:05:59
└─ stored: St 17. november 2021, 17:12:54
├─ policy: iommu
└─ key: no
*cmd line used by VM manager to start windows (I inserted newlines for
better readability):*
/usr/bin/qemu-system-x86_64 -name guest=win10,debug-threads=on -S -object
secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-6-win10/master-key.aes
-machine pc-q35-4.2,accel=kvm,usb=off,vmport=off,dump-guest-core=off
-cpu
Icelake-Server,ss=on,vmx=on,pdcm=on,hypervisor=on,tsc-adjust=on,avx512ifma=on,sha-ni=on,rdpid=on,movdiri=on,movdir64b=on,fsrm=on,md-clear=on,stibp=on,arch-capabilities=on,xsaves=on,ibpb=on,ibrs=on,amd-stibp=on,amd-ssbd=on,rdctl-no=on,ibrs-all=on,skip-l1dfl-vmentry=on,mds-no=on,pschange-mc-no=on,hle=off,rtm=off,mpx=off,intel-pt=off,la57=off,wbnoinvd=off,hv-time,hv-relaxed,hv-vapic,hv-spinlocks=0x1fff
-m 8192 -overcommit mem-lock=off -smp 4,sockets=4,cores=1,threads=1 -uuid
4be79611-2312-4054-a7e9-3ca041d564af -no-user-config -nodefaults -chardev
socket,id=charmonitor,fd=31,server,nowait -mon
chardev=charmonitor,id=monitor,mode=control -rtc
base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=delay
-no-hpet -no-shutdown -global ICH9-LPC.disable_s3=1 -global
ICH9-LPC.disable_s4=1 -boot menu=on,strict=on
-device
pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x2
-device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1
-device pcie-root-port,port=0x12,chassis=3,id=pci.3,bus=pcie.0,addr=0x2.0x2
-device pcie-root-port,port=0x13,chassis=4,id=pci.4,bus=pcie.0,addr=0x2.0x3
-device pcie-root-port,port=0x14,chassis=5,id=pci.5,bus=pcie.0,addr=0x2.0x4
-device pcie-root-port,port=0x15,chassis=6,id=pci.6,bus=pcie.0,addr=0x2.0x5
-device pcie-root-port,port=0x16,chassis=7,id=pci.7,bus=pcie.0,addr=0x2.0x6
-device pcie-pci-bridge,id=pci.8,bus=pci.1,addr=0x0 -device
qemu-xhci,p2=15,p3=15,id=usb,bus=pci.2,addr=0x0 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.3,addr=0x0
-blockdev
'{"driver":"file","filename":"/var/lib/libvirt/images/pool/win10.qcow2","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"}'
-blockdev
'{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"qcow2","file":"libvirt-1-storage","backing":null}'
-device
virtio-blk-pci,scsi=off,bus=pci.4,addr=0x0,drive=libvirt-1-format,id=virtio-disk0,bootindex=1,write-cache=on
-netdev tap,fd=33,id=hostnet0,vhost=on,vhostfd=34
-device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:b8:50:7e,bus=pci.6,addr=0x0
-chardev pty,id=charserial0 -device
isa-serial,chardev=charserial0,id=serial0 -chardev
spicevmc,id=charchannel0,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-device usb-tablet,id=input0,bus=usb.0,port=1 -spice
port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on
-device
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pcie.0,addr=0x1
-device ich9-intel-hda,id=sound0,bus=pcie.0,addr=0x1b -device
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
spicevmc,id=charredir0,name=usbredir -device
usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev
spicevmc,id=charredir1,name=usbredir -device
usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device
vfio-pci,host=0000:2d:00.0,id=hostdev0,bus=pci.8,addr=0x1 -device
virtio-balloon-pci,id=balloon0,bus=pci.5,addr=0x0 -sandbox
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny
-msg timestamp=on
As I am not experienced in this field, and I did not find any topics
covering similar issues, I would like to ask you for help. Could you help
me debug this issue and find a problem?
Thank you very much!
Kind regards,
Marek Turza
