Hi, I'm facing an issue with libvirt and the LIBXL driver, failing when searching for DMI data in /sys. info : libvirt version: 5.0.0, package: 4+deb10u1 (Guido Günther <agx(a)sigxcpu.org&gt; Thu, 05 Dec 2019 00:22:14 +0100) error : udevGetDMIData:1719 : internal error: Failed to get udev device for syspath '/sys/devices/virtual/dmi/id' or '/sys/class/dmi/id'

error : libxlDriverConfigNew:1803 : Unable to configure libxl's memory management parameters

error : virStateInitialize:662 : Initialization of LIBXL state driver failed: internal error: Failed to get udev device for syspath '/sys/devices/virtual/dmi/id' or '/sys/class/dmi/id'

error : daemonRunStateInit:799 : Driver state initialization failed The relevant function udevGetDMIData in libvirt: https://github.com/libvirt/libvirt/blob/cb09344a2cccc0cc9bcefa3cb53d7af45... I don't understand what's happening, as this initialization failure only happens when I boot on the Xen kernel. Also, the /sys/class/dmi* paths are not exposed on Xen. Note: Running on Xen 4.12.1 Any ideas ? Thanks !

Le lundi 28 septembre 2020 19:04, Jim Fehlig <jfehlig(a)suse.com&gt; a écrit : > On 9/28/20 5:21 AM, Mathieu Tarral wrote: > >> Hi, >> I'm facing an issue with libvirt and the LIBXL driver, failing when searching for DMI data in /sys. >> info : libvirt version: 5.0.0, package: 4+deb10u1 (Guido Günther agx(a)sigxcpu.org Thu, 05 Dec 2019 00:22:14 +0100) >> error : udevGetDMIData:1719 : internal error: Failed to get udev device for syspath '/sys/devices/virtual/dmi/id' or '/sys/class/dmi/id' >> error : libxlDriverConfigNew:1803 : Unable to configure libxl's memory management parameters > > Ján already pointed out this is the important error, which usually means the > xencommons service is not running and the xen tooling has not been initialized. > Do you see a "Domain-0" using xen's xl tool? E.g. 'xl list'? I can run sudo xl list, and see the Domain-0 I have a custom Xen compiled from source installed, via the xen-upstream debian package generated by the makefile. I think there might be a conflict with a Xen version that I installed before from Debian packages. Also, I can see that the xencommons service could not start because of a PID issue. I removed the xen-upstream package, and reinstalled xen-system-amd64 Debian package, rebooted, and now the libvirt connection works. The thing, I would like to run the latest Xen, and at the same time, have libvirt to manage my VMs with virt-manager. The main issue is that libvirt's xen driver depends on xen libs which are conflicting with my xen upstream installation. I don't know how to solve this.