[Qemu-devel] [Bug 721793] [NEW] QEMU freezes on startup (100% CPU utilization)

[Vlad Glagolev]

Public bug reported:

0.12.5 was the last version of QEMU that runs ok and boots any os image.

0.13.0-0.14.0 just freeze, and the only thing I see is a black screen and both 
of them make it use 100% of CPU also.
Both kernels 2.6.35.11 and 2.6.37.1 with and without PAE support.

tested commands:

W2000:
$ qemu -m 256 -localtime -net nic,model=rtl8139 -net tap -usbdevice 
host:0e21:0750 /var/opt/vm/w2000.img
W2000:
$ qemu /var/opt/vm/w2000.img
OpenBSD 4.8:
$ qemu -cdrom ~/cd48.iso -boot d empty-qcow2.img

tried to use `-M pc-0.12` selector, different audio cards (I've found it caused 
infinite loop on startup once) -- no luck.
tried to use recent seabios from git -- still no luck.

attached strace log of 0.14.0.

everything was tested on HP mini 311C with Intel Atom N270.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/721793

Title:
  QEMU freezes on startup (100% CPU utilization)

Status in QEMU:
  New

Bug description:
  0.12.5 was the last version of QEMU that runs ok and boots any os
  image.

  0.13.0-0.14.0 just freeze, and the only thing I see is a black screen and 
both of them make it use 100% of CPU also.
  Both kernels 2.6.35.11 and 2.6.37.1 with and without PAE support.

  tested commands:

  W2000:
  $ qemu -m 256 -localtime -net nic,model=rtl8139 -net tap -usbdevice 
host:0e21:0750 /var/opt/vm/w2000.img
  W2000:
  $ qemu /var/opt/vm/w2000.img
  OpenBSD 4.8:
  $ qemu -cdrom ~/cd48.iso -boot d empty-qcow2.img

  tried to use `-M pc-0.12` selector, different audio cards (I've found it 
caused infinite loop on startup once) -- no luck.
  tried to use recent seabios from git -- still no luck.

  attached strace log of 0.14.0.

  everything was tested on HP mini 311C with Intel Atom N270.