[Bug 1866870] Re: KVM Guest pauses after upgrade to Ubuntu 20.04

[Christian Ehrhardt ]

Turns out 1.12 is a fairly old build and the working version in Ubuntu was from 
in Disco, therefore about a year ago.
=> https://launchpad.net/ubuntu/+source/seabios/1.12.0-1/+build/16284605

Therefore I built it in Eoan and even Disco.
As an overview:
Disco: gcc 4:8.3.0-1ubuntu3   binutils 2.32-7ubuntu4
Eoan:  gcc 4:9.2.1-3.1ubuntu1 binutils 2.33-2ubuntu1.2
Focal: gcc 4:9.2.1-3.1ubuntu1 binutils 2.34-4ubuntu1

I ended up with these binaries to test:
./git-built-in-eoan/rel-1.12/bios.bin Breaks
./git-built-in-eoan/rel-1.13/bios.bin Breaks
./git-built-in-disco/rel-1.13/bios.bin Works
./git-built-in-disco/rel-1.12/bios.bin Works
./git-built-in-focal/head/bios.bin Breaks
./git-built-in-focal/rel-1.12/bios.bin Breaks
./git-built-in-focal/rel-1.13/bios.bin Breaks
./packaging/disco-seabios_1.12.0-1/bios.bin Works
./packaging/focal-seabios_1.13.0-1/bios.bin Breaks

To summarize:
- qemu breaks on chips of the Penryn generation
- it only breaks if the seabios bios is executed
- does not really depend on seabios or qemu version
- but it depends on seabios build environment

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https://bugs.launchpad.net/bugs/1866870

Title:
  KVM Guest pauses after upgrade to Ubuntu 20.04

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Incomplete

Bug description:
  Symptom:
  Error unpausing domain: internal error: unable to execute QEMU command 
'cont': Resetting the Virtual Machine is required

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in 
cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 
66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/object/domain.py", line 1311, in 
resume
      self._backend.resume()
    File "/usr/lib/python3/dist-packages/libvirt.py", line 2174, in resume
      if ret == -1: raise libvirtError ('virDomainResume() failed', dom=self)
  libvirt.libvirtError: internal error: unable to execute QEMU command 'cont': 
Resetting the Virtual Machine is required

  
  ---

  As outlined here:
  https://bugs.launchpad.net/qemu/+bug/1813165/comments/15

  After upgrade, all KVM guests are in a default pause state. Even after
  forcing them off via virsh, and restarting them the guests are paused.

  These Guests are not nested.

  A lot of diganostic information are outlined in the previous bug
  report link provided. The solution mentioned in previous report had
  been allegedly integrated into the downstream updates.

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