[Qemu-devel] [Bug 1736042] Re: qemu-system-x86_64 does not boot image reliably

[tezeb]

I want a fix ;) and I do expect qemu to get it faster then Ubuntu.
So I set up Ubuntu Zesty(to fullfill dependencies) and build qemu:
QEMU emulator version 2.10.1 (v2.10.1-dirty)
and... it's still there.

Can you tell me how and what logs to provide?

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

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https://bugs.launchpad.net/bugs/1736042

Title:
  qemu-system-x86_64 does not boot image reliably

Status in QEMU:
  New

Bug description:
  Booting image as root user with following command works randomly.

  ./qemu-system-x86_64 -enable-kvm -curses -smp cpus=4 -m 8192
  /root/ructfe2917_g.qcow2

  Most of the time it ends up on "800x600 Graphic mode"(been stuck there
  even for 4 hours before killed), but 1 out of ~20 it boots image
  correctly(and instantly).

  This is visible in v2.5.0 build from sources, v2.5.0 from Ubuntu
  Xenial and v2.1.2 from Debian Jessie.

  The image in question was converted from vmdk using:

  qemu-img convert -O qcow2 file.vmdk file.qcow2

  The image contains Ubuntu with grub.

  I can provide debug logs, but will need guidance how to enable
  them(and what logs are necessary).

  As a side note, it seems that booting is more certain after
  connecting(or mounting) partition using qemu-nbd/mount.

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