[Qemu-devel] [Bug 1366836] [NEW] Core2Duo and KVM may not boot Win8 properly on 3.x kernels

[Erik Rull]

Public bug reported:

When I start up QEMU w/ KVM 1.7.0 on a Core2Duo machine running a vanilla kernel
3.4.67 or 3.10.12 to run a Windows 8.0 guest, the guest freezes at Windows 8 
boot without any error.
When I dump the CPU registers via "info registers", nothing changes, that means
the system really stalled. Same happens with QEMU 2.0.0 and QEMU 2.1.0.

But - when I run the very same guest using Kernel 2.6.32.12 and QEMU 1.7.0 or 
2.0.0 on
the host side it works on the Core2Duo. Also the system above but just with an
i3 or i5 CPU it works fine.

I already disabled networking and USB for the guest and changed the graphics
card - no effect. I assume that some mean bits and bytes have to be set up
properly to get the thing running.

Seems to be related to a kvm/processor incompatibility.

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: core2duo kvm

** Description changed:

  When I start up QEMU w/ KVM 1.7.0 on a Core2Duo machine running a vanilla 
kernel
  3.4.67 or 3.10.12 to run a Windows 8.0 guest, the guest freezes at Windows 8 
boot without any error.
  When I dump the CPU registers via "info registers", nothing changes, that 
means
  the system really stalled. Same happens with QEMU 2.0.0 and QEMU 2.1.0.
  
  But - when I run the very same guest using Kernel 2.6.32.12 and QEMU 1.7.0 or 
2.0.0 on
  the host side it works on the Core2Duo. Also the system above but just with an
  i3 or i5 CPU it works fine.
  
  I already disabled networking and USB for the guest and changed the graphics
  card - no effect. I assume that some mean bits and bytes have to be set up
  properly to get the thing running.
  
- Seems to be related to a kvm/progressor incompatibility.
+ Seems to be related to a kvm/procressor incompatibility.

** Description changed:

  When I start up QEMU w/ KVM 1.7.0 on a Core2Duo machine running a vanilla 
kernel
  3.4.67 or 3.10.12 to run a Windows 8.0 guest, the guest freezes at Windows 8 
boot without any error.
  When I dump the CPU registers via "info registers", nothing changes, that 
means
  the system really stalled. Same happens with QEMU 2.0.0 and QEMU 2.1.0.
  
  But - when I run the very same guest using Kernel 2.6.32.12 and QEMU 1.7.0 or 
2.0.0 on
  the host side it works on the Core2Duo. Also the system above but just with an
  i3 or i5 CPU it works fine.
  
  I already disabled networking and USB for the guest and changed the graphics
  card - no effect. I assume that some mean bits and bytes have to be set up
  properly to get the thing running.
  
- Seems to be related to a kvm/procressor incompatibility.
+ Seems to be related to a kvm/processor incompatibility.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1366836

Title:
  Core2Duo and KVM may not boot Win8 properly on 3.x kernels

Status in QEMU:
  New

Bug description:
  When I start up QEMU w/ KVM 1.7.0 on a Core2Duo machine running a vanilla 
kernel
  3.4.67 or 3.10.12 to run a Windows 8.0 guest, the guest freezes at Windows 8 
boot without any error.
  When I dump the CPU registers via "info registers", nothing changes, that 
means
  the system really stalled. Same happens with QEMU 2.0.0 and QEMU 2.1.0.

  But - when I run the very same guest using Kernel 2.6.32.12 and QEMU 1.7.0 or 
2.0.0 on
  the host side it works on the Core2Duo. Also the system above but just with an
  i3 or i5 CPU it works fine.

  I already disabled networking and USB for the guest and changed the graphics
  card - no effect. I assume that some mean bits and bytes have to be set up
  properly to get the thing running.

  Seems to be related to a kvm/processor incompatibility.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1366836/+subscriptions