[Bug 217799] New: kvm: Windows Server 2003 VM fails to work on 6.1.44 (works fine on 6.1.43)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217799

            Bug ID: 217799
           Summary: kvm: Windows Server 2003 VM fails to work on 6.1.44
                    (works fine on 6.1.43)
           Product: Virtualization
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: rm+bko@romanrm.net
        Regression: No

Hello,

I have a virtual machine running the old Windows Server 2003. On kernels 6.1.44
and 6.1.45, the QEMU VNC window stays dark, not switching to any of the guest's
video modes and the VM process uses only ~64 MB of RAM of the assigned 2 GB,
indefinitely. It's like the VM is paused/halted/stuck before even starting. The
process can be killed successfully and then restarted again (with the same
result), so it is not deadlocked in kernel or the like.

Kernel 6.1.43 works fine.

I have also tried downgrading CPU microcode from 20230808 to 20230719, but that
did not help.

The CPU is AMD Ryzen 5900. I suspect some of the newly added mitigations may be
the culprit?

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.