Am 23.12.2010 um 03:42 schrieb Stefan Hajnoczi:
> On Wed, Dec 22, 2010 at 10:02 AM, Peter Lieven <pl@xxxxxxx> wrote:
>> If I start a VM with the following parameters
>> qemu-kvm-0.13.0 -m 2048 -smp 2 -monitor tcp:0:4014,server,nowait -vnc :14 -name 'ubuntu.test' -boot order=dc,menu=off -cdrom ubuntu-10.04.1-desktop-amd64.iso -k de
>>
>> and select memtest in the Ubuntu CD Boot Menu, the VM immediately resets. After this reset there happen several errors including graphic corruption or the qemu-kvm binary
>> aborting with error 134.
>>
>> Exactly the same scenario on the same machine with qemu-kvm-0.12.5 works flawlessly.
>>
>> Any ideas?
>
> You could track down the commit which broke this using git-bisect(1).
> The steps are:
>
> $ git bisect start v0.13.0 v0.12.5
>
> Then:
>
> $ ./configure [...] && make
> $ x86_64-softmmu/qemu-system-x86_64 -m 2048 -smp 2 -monitor
> tcp:0:4014,server,nowait -vnc :14 -name 'ubuntu.test' -boot
> order=dc,menu=off -cdrom ubuntu-10.04.1-desktop-amd64.iso -k de
>
> If memtest runs as expected:
> $ git bisect good
> otherwise:
> $ git bisect bad
>
> Keep repeating this and you should end up at the commit that introduced the bug.
this was the outcome of my bisect session:
956a3e6bb7386de48b642d4fee11f7f86a2fcf9a is first bad commit
commit 956a3e6bb7386de48b642d4fee11f7f86a2fcf9a
Author: Blue Swirl <blauwirbel@xxxxxxxxx>
Date: Sat May 22 07:59:01 2010 +0000
Compile pckbd only once
Use a qemu_irq to indicate A20 line changes. Move I/O port 92
to pckbd.c.
Signed-off-by: Blue Swirl <blauwirbel@xxxxxxxxx>
:100644 100644 acbaf227455f931f3ef6dbe0bb4494c6b41f2cd9 1a33d4eb4a5624c55896871b5f4ecde78a49ff28 M Makefile.objs
:100644 100644 a22484e1e98355a35deeb5038a45fb8fe8685a91 ba5147fbc48e4faef072a5be6b0d69d3201c1e18 M Makefile.target
:040000 040000 dd03f81a42b5162c93c40c517f45eb9f7bece93c 309f472328632319a15128a59715aa63daf4d92c M default-configs
:040000 040000 83201c4fcde2f592a771479246e0a33a8906515b b1192bce85f2a7129fb19cf2fe7462ef168165cb M hw
bisect run success
>
> Stefan
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