Re: [Qemu-devel] Fwd: Problem booting 32 bit guest on 64 bit host using kvm

[Mark Blakeney]

As per first post, kvm worked for me on Ubuntu 12.04 32 bit with
whatever 3.* kernel that was. I have upgraded to a new box with newly
installed Ubuntu 12.10 64 bit and now kvm does not work. Same qemu
image. I suspect the architecture change from 32 to 64 bit is the
issue here but I guess you are suggesting it may be related to the
kernel upgrade?

--
Mark Blakeney.


On Tue, Jan 1, 2013 at 9:30 PM, Gleb Natapov <address@hidden> wrote:
> On Tue, Jan 01, 2013 at 09:17:52PM +1000, Mark Blakeney wrote:
>> Linux pc 3.7.0-7-generic #15-Ubuntu SMP Sat Dec 15 16:34:25 UTC 2012
>> x86_64 x86_64 x86_64 GNU/Linux (Ubuntu version 3.7.0.7.11)
>>
>> I am using xorg edgers on Ubuntu 12.10 because I have a brand new box
>> and have been seeing graphics issues so trying latest drivers.
>> However, I am fairly sure I tried booting that qemu image on the stock
>> Ubuntu kernel (3.5.0.21.27) with the same result.
>>
> So is there kernel that works, or kvm never worked for this image?
>
>> --
>> Mark Blakeney.
>>
>>
>> On Tue, Jan 1, 2013 at 8:08 PM, Gleb Natapov <address@hidden> wrote:
>> > On Tue, Jan 01, 2013 at 11:17:52AM +1000, Mark Blakeney wrote:
>> >> Hi, I am inexperienced using QEMU and hoping somebody here can help me.
>> >>
>> >> Some time ago I cloned a disk image of an old Solaris legacy system and 
>> >> was
>> >> able to successfully boot and use it within QEMU. Recently I upgraded my
>> >> host from i386 Ubuntu 12.04 to a new box running x86_64 Ubuntu 12.10. Now 
>> >> I
>> >> find that the same qemu command line results in that guest failing to boot
>> >> with a "no active boot partition" error message.
>> >>
>> >> The command I have been using is:
>> >>
>> >> qemu-system-i386 \
>> >>   -machine pc,accel=kvm \
>> >>   -m 256M \
>> >>   -vga std \
>> >>   -net nic,vlan=1,model=pcnet \
>> >>   -net user,vlan=1,hostfwd=::8050-$GUEST:22 \
>> >>   -hda "$DISK"
>> >>
>> >> I find that if I change to "accel=tcg" in above command (or add -no-kvm)
>> >> then the guest will boot ok but I find my host works much harder & slower
>> >> than when I use kvm. Is there a qemu option so I can use kvm but get 
>> >> around
>> >> this guest boot issue?
>> >>
>> > What is your kernel version?
>> >
>> > --
>> >                         Gleb.
>
> --
>                         Gleb.