VirtualBox 6 Virtual Machine with more than 1 core and kernel 4* freezes












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When I try to set a VM with more than 1 core CPU, the guest system freezes quickly.



I opened a thread on the VirtualBox forum and they said that is a Linux problem (WBox forum moderator told me that this is an Ubuntu bug).



I had tried the KVM option (as suggested in the answer below) and other settings... AMD-VT, PAE, Nested pages, etc, but nothing makes the VM stable. The error I get most frequently is a loop that prints in TTY1



CPU #03 stuck for 23 sec


As I said in the WB forum a VM with 6 CPUs is still running very fast with the old 3.13.0-164-lowlatency kernel, but I can't use that because it's no longer supported.



What could be the problem, and how can I fix it?










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    When I try to set a VM with more than 1 core CPU, the guest system freezes quickly.



    I opened a thread on the VirtualBox forum and they said that is a Linux problem (WBox forum moderator told me that this is an Ubuntu bug).



    I had tried the KVM option (as suggested in the answer below) and other settings... AMD-VT, PAE, Nested pages, etc, but nothing makes the VM stable. The error I get most frequently is a loop that prints in TTY1



    CPU #03 stuck for 23 sec


    As I said in the WB forum a VM with 6 CPUs is still running very fast with the old 3.13.0-164-lowlatency kernel, but I can't use that because it's no longer supported.



    What could be the problem, and how can I fix it?










    share|improve this question









    New contributor




    ICE-Luder is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      0












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      0








      When I try to set a VM with more than 1 core CPU, the guest system freezes quickly.



      I opened a thread on the VirtualBox forum and they said that is a Linux problem (WBox forum moderator told me that this is an Ubuntu bug).



      I had tried the KVM option (as suggested in the answer below) and other settings... AMD-VT, PAE, Nested pages, etc, but nothing makes the VM stable. The error I get most frequently is a loop that prints in TTY1



      CPU #03 stuck for 23 sec


      As I said in the WB forum a VM with 6 CPUs is still running very fast with the old 3.13.0-164-lowlatency kernel, but I can't use that because it's no longer supported.



      What could be the problem, and how can I fix it?










      share|improve this question









      New contributor




      ICE-Luder is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      When I try to set a VM with more than 1 core CPU, the guest system freezes quickly.



      I opened a thread on the VirtualBox forum and they said that is a Linux problem (WBox forum moderator told me that this is an Ubuntu bug).



      I had tried the KVM option (as suggested in the answer below) and other settings... AMD-VT, PAE, Nested pages, etc, but nothing makes the VM stable. The error I get most frequently is a loop that prints in TTY1



      CPU #03 stuck for 23 sec


      As I said in the WB forum a VM with 6 CPUs is still running very fast with the old 3.13.0-164-lowlatency kernel, but I can't use that because it's no longer supported.



      What could be the problem, and how can I fix it?







      virtualbox multi-core






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      edited yesterday









      Zanna

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      asked Jan 15 at 17:48









      ICE-LuderICE-Luder

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          Try explicitly setting paravirtualization (in settings/system/acceleration) to KVM or Hyper-V, rather than legacy.






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            Try explicitly setting paravirtualization (in settings/system/acceleration) to KVM or Hyper-V, rather than legacy.






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              Try explicitly setting paravirtualization (in settings/system/acceleration) to KVM or Hyper-V, rather than legacy.






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                Try explicitly setting paravirtualization (in settings/system/acceleration) to KVM or Hyper-V, rather than legacy.






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                Try explicitly setting paravirtualization (in settings/system/acceleration) to KVM or Hyper-V, rather than legacy.







                share|improve this answer








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                answered 2 days ago









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