Christoph, Not sure if this is relevant or not, sadly probably not useful.
https://libvirt.org/formatdomain.html https://pve.proxmox.com/wiki/Qemu/KVM_Virtual_Machines https://www.linux-kvm.org/page/VMchannel_Requirements https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-guest_virtual_machine_device_configuration-usb_devices#sect-USB_devices-Setting_a_limit_on_USB_device_redirection https://www.spice-space.org/usbredir.html https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/chap-qemu_guest_agent#sect-QEMU_Guest_Agent-Set_Up_Communication_between_Guest_Agent_and_Host-Linux Chapter 11. Enhancing Virtualization with the QEMU Guest Agent Add the following to the guest's XML file and save the changes: <channel type='unix'> <target type='virtio' name='org.qemu.guest_agent.0'/> </channel> Below is what Virt-Manager created: <channel type="unix"> <source mode="bind" path="/var/lib/libvirt/qemu/channel/target/domain-7-01-01-Deb-KDE-VNC/org.qemu.guest_agent.0"/> <target type="virtio" name="org.qemu.guest_agent.0" state="connected"/> <alias name="channel0"/> <address type="virtio-serial" controller="0" bus="0" port="1"/> </channel> My test VM would need this port open "5900" <graphics type="vnc" port="5900" autoport="yes" listen="127.0.0.1"> <listen type="address" address="127.0.0.1"/> </graphics> I added a channel as per below, but I do not really know what it does. I am not able to copy to/from clipboard, maybe I need to enable something else as well? I check the VM and it does have qemu-guest-agent installed. <channel type="qemu-vdagent"> <source> <clipboard copypaste="yes"/> </source> <target type="virtio" name="org.libguestfs.channel.0" state="disconnected"/> <alias name="channel1"/> <address type="virtio-serial" controller="0" bus="0" port="2"/> </channel> https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-manipulating_the_domain_xml-devices#sect-Devices-Redirected_devices redirdev This is the main container for describing redirected devices. bus must be usb for a USB device. An additional attribute type is required, matching one of the supported serial device types, to describe the host physical machine side of the tunnel: type='tcp' or type='spicevmc' (which uses the usbredir channel of a SPICE graphics device) are typical. On Thursday, 04-07-2024 at 11:08 George at Clug wrote: > Christoph, > > I do not have access to OpenNebula with which I could test. > > I do have access to Virt-Manager and so I built up a Virtual Machine of > Bookworm (Debian 12) with KDE so that I would have the sddm display manger. > > Then I set the "graphics type" to VNC, but I could not start the VM until I > removed any mention to spice (or otherwise I could not set the graphics type > to VNC). > > The below configuration for the VM I created, runs KDE display very well. I > presume sound does not work with VNC. > > Have you been able to try Virt-Manager to run your Debian VMs? > > FYI: I have found that Virt-Manger prefers to use use Spice more than VNC, > and as spice gives me sound I normally use Spice for USB redirection and for > Display with the display type. > > I hope this information might be may be of help to you. > > Regards, > > George. > > > <domain type="kvm"> > <name>01-01-Deb-KDE-VNC</name> > <uuid>4280bdf6-667b-407a-975d-3caea376172d</uuid> > <metadata> > <libosinfo:libosinfo > xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0";> > <libosinfo:os id="http://debian.org/debian/12"/> > </libosinfo:libosinfo> > </metadata> > <memory unit="KiB">8388608</memory> > <currentMemory unit="KiB">8388608</currentMemory> > <vcpu placement="static">4</vcpu> > <os> > <type arch="x86_64" machine="pc-q35-7.2">hvm</type> > <boot dev="hd"/> > </os> > <features> > <acpi/> > <apic/> > <vmport state="off"/> > </features> > <cpu mode="host-passthrough" check="none" migratable="on"/> > <clock offset="utc"> > <timer name="rtc" tickpolicy="catchup"/> > <timer name="pit" tickpolicy="delay"/> > <timer name="hpet" present="no"/> > </clock> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>destroy</on_crash> > <pm> > <suspend-to-mem enabled="no"/> > <suspend-to-disk enabled="no"/> > </pm> > <devices> > <emulator>/usr/bin/qemu-system-x86_64</emulator> > <disk type="file" device="disk"> > <driver name="qemu" type="qcow2" discard="unmap"/> > <source file="/var/lib/libvirt/images/01-01-Deb-KDE-VNC.qcow2"/> > <target dev="vda" bus="virtio"/> > <address type="pci" domain="0x0000" bus="0x04" slot="0x00" > function="0x0"/> > </disk> > <disk type="file" device="cdrom"> > <driver name="qemu" type="raw"/> > <target dev="sda" bus="sata"/> > <readonly/> > <address type="drive" controller="0" bus="0" target="0" unit="0"/> > </disk> > <controller type="usb" index="0" model="qemu-xhci" ports="15"> > <address type="pci" domain="0x0000" bus="0x02" slot="0x00" > function="0x0"/> > </controller> > <controller type="pci" index="0" model="pcie-root"/> > <controller type="pci" index="1" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="1" port="0x10"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x0" multifunction="on"/> > </controller> > <controller type="pci" index="2" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="2" port="0x11"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x1"/> > </controller> > <controller type="pci" index="3" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="3" port="0x12"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x2"/> > </controller> > <controller type="pci" index="4" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="4" port="0x13"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x3"/> > </controller> > <controller type="pci" index="5" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="5" port="0x14"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x4"/> > </controller> > <controller type="pci" index="6" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="6" port="0x15"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x5"/> > </controller> > <controller type="pci" index="7" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="7" port="0x16"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x6"/> > </controller> > <controller type="pci" index="8" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="8" port="0x17"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x02" > function="0x7"/> > </controller> > <controller type="pci" index="9" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="9" port="0x18"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x0" multifunction="on"/> > </controller> > <controller type="pci" index="10" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="10" port="0x19"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x1"/> > </controller> > <controller type="pci" index="11" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="11" port="0x1a"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x2"/> > </controller> > <controller type="pci" index="12" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="12" port="0x1b"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x3"/> > </controller> > <controller type="pci" index="13" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="13" port="0x1c"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x4"/> > </controller> > <controller type="pci" index="14" model="pcie-root-port"> > <model name="pcie-root-port"/> > <target chassis="14" port="0x1d"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x03" > function="0x5"/> > </controller> > <controller type="sata" index="0"> > <address type="pci" domain="0x0000" bus="0x00" slot="0x1f" > function="0x2"/> > </controller> > <controller type="virtio-serial" index="0"> > <address type="pci" domain="0x0000" bus="0x03" slot="0x00" > function="0x0"/> > </controller> > <interface type="network"> > <mac address="52:54:00:e7:bb:67"/> > <source network="default"/> > <model type="virtio"/> > <address type="pci" domain="0x0000" bus="0x01" slot="0x00" > function="0x0"/> > </interface> > <serial type="pty"> > <target type="isa-serial" port="0"> > <model name="isa-serial"/> > </target> > </serial> > <console type="pty"> > <target type="serial" port="0"/> > </console> > <channel type="unix"> > <target type="virtio" name="org.qemu.guest_agent.0"/> > <address type="virtio-serial" controller="0" bus="0" port="1"/> > </channel> > <input type="tablet" bus="usb"> > <address type="usb" bus="0" port="1"/> > </input> > <input type="mouse" bus="ps2"/> > <input type="keyboard" bus="ps2"/> > <graphics type="vnc" port="-1" autoport="yes"> > <listen type="address"/> > </graphics> > <sound model="ich9"> > <address type="pci" domain="0x0000" bus="0x00" slot="0x1b" > function="0x0"/> > </sound> > <audio id="1" type="none"/> > <video> > <model type="virtio" heads="1" primary="yes"/> > <address type="pci" domain="0x0000" bus="0x00" slot="0x01" > function="0x0"/> > </video> > <memballoon model="virtio"> > <address type="pci" domain="0x0000" bus="0x05" slot="0x00" > function="0x0"/> > </memballoon> > <rng model="virtio"> > <backend model="random">/dev/urandom</backend> > <address type="pci" domain="0x0000" bus="0x06" slot="0x00" > function="0x0"/> > </rng> > </devices> > </domain> > > > > On Wednesday, 03-07-2024 at 17:41 Christoph Pleger wrote: > > Hello, > > > > > My first thoughts were firewall issues. > > > > It is not a connection problem. When I open a browser window to vnc > > connect to the VM, I can even see the mouse pointer, what shows that > > the VM Xorg server is still running, and sshing to the VM and doing a > > ps confirms that. > > > > > > > > > > However, after installing a VM with Debian 12, none of these three > > > > display managers shows its GUI login screen after boot. With sddm > > > > it is > > > > noticeable that the process sddm-helper crashes shortly after it is > > > > started. > > > > > > In crashes, do you mean the server's log files show that the display > > > manager has terminated due to some error? > > > > Unfortunately, I could not find a log that tells what exactly happened. > > But it is clear that sddm-helper crashes with a segmentation fault. > > > > Regards > > Christoph > > > >
