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  1. VM shutdown, KVM: entry failed, hardware error 0x80000021

    Short update: I have upgraded to 5.15.39-4 a week ago and also removed the setting kvm.tdp_mmu=N So far all my VM are running stable and do not crash during backup. Especially my Exchange server was an issue. But now I have another issue after this change: almost each day I have at least one VM...
  2. VM shutdown, KVM: entry failed, hardware error 0x80000021

    small update: Last week I have unpinned kernel 5.13.19-6-pve and switched back to the last kernel version but together with the option kvm tdp_mmu=N and rebooted as suggested. So far no issues, no VM crashed. A small side effect: after enabling the option kvm tdp_mmu=N I had to switch the CPU...
  3. VM shutdown, KVM: entry failed, hardware error 0x80000021

    Before I downgraded the kernel to 5.13.19-6, I got this issue regularly during backup on an Exchange 2016 server on Win2016, in the last days also during day (no running backup task). My home lab is a Z390 chipset (Gigabyte) with Intel I7 8700 (coffeelake), 128 GB RAM and 2x2 TB NVME. There are...

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