The warnings in the report like "MSR(48FH).vmx-exit-load-perf-global-ctrl" are unrelated (in regard to guest hang). Those happen on a) too old kernels that don't support the feature b) mismatch of expectations of a chips vs its actual capabilities E.g. if libvirt thinks a feature should be supported by a chip, but isn't. There are toomany SKUs out there to be perfect - so these are red-herrings at best.
I have not seen similar reports recently nor anyone else chiming in on this one. After loosing what e thought could be a track to the bgu I'm puzzled what to do now on this? @Andreas - did you in the meantime find any new insight on this? ** Changed in: qemu (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1877052 Title: KVM Win 10 guest pauses after kernel upgrade Status in QEMU: New Status in qemu package in Ubuntu: Incomplete Bug description: Hello! Unfortunately the bug has apparently reappeared. I have a Windows 10 running in a VM, which after my today's "apt upgrade" goes into pause mode after a few seconds of running time. Until yesterday it used to work and I was able to boot the VM. During the kernel update (from 5.4.0-28.33 to 5.4.0-29.34) the VM was active and then went into pause mode. Even after a reboot of my host system the problem still persists: the VM boots for a few seconds and then switches to pause mode. Current Kernel: Linux andreas-laptop 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Maybe relevant logfile lines: 2020-05-06T07:46:42.857574Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(48FH).vmx-exit-load-perf-global-ctrl [bit 12] 2020-05-06T07:46:42.857718Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(490H).vmx-entry-load-perf-global-ctrl [bit 13] 2020-05-06T07:46:42.860567Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(48FH).vmx-exit-load-perf-global-ctrl [bit 12] 2020-05-06T07:46:42.860582Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(490H).vmx-entry-load-perf-global-ctrl [bit 13] 2020-05-06T07:47:22.901057Z qemu-system-x86_64: terminating on signal 15 from pid 1593 (/usr/sbin/libvirtd) 2020-05-06 07:47:23.101+0000: shutting down, reason=destroyed Kind regards, Andreas To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1877052/+subscriptions