[Qemu-devel] [Bug 1336801] Re: 12.04 guest hangs on a 14.04 host server with cirrus graphics

[Serge Hallyn]

Note that on a successful boot, dmesg | grep cirrus shows:

[    9.064581] fb: conflicting fb hw usage cirrusdrmfb vs EFI VGA - removing 
generic driver
[    9.133808] fbcon: cirrusdrmfb (fb0) is primary device
[    9.431359] cirrus 0000:00:02.0: fb0: cirrusdrmfb frame buffer device
[    9.431362] cirrus 0000:00:02.0: registered panic notifier
[    9.652851] [drm] Initialized cirrus 1.0.0 20110418 for 0000:00:02.0 on 
minor 0

I can also reproduce this on qemu built from upstream git head (earlier
this week) so marking as affecting the upstream project.

** Package changed: libvirt (Ubuntu) => qemu (Ubuntu)

** Also affects: qemu
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1336801

Title:
  12.04 guest hangs on a 14.04 host  server with cirrus graphics

Status in QEMU:
  New
Status in “qemu” package in Ubuntu:
  Triaged

Bug description:
  A new 12.04.4 server guest installation hangs on a 14.04 server host
  machine.

  I did the following:

  Created a new Virtual Machine with the Ubuntu 12.04 template using 
virt-manager
  Ran through the installation without a hitch to install a LAMP+SSH server. 
All standard options apart from that.
  On reboot the 12.04 guest started but then hung after doing fsck step.
  Trying different options (change disk driver, etc) made it progress a couple 
more steps but still hung.

  The thing that fixed it in the end was to switch to a VGA display
  driver, away from the default.

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