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

[Gleb Natapov]

On Tue, Jan 01, 2013 at 10:42:26PM +1000, Mark Blakeney wrote:
> 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?
> 
Don't know yet. What was the kernel version on 12.04 32 bit?
You said that kernel 3.5 64bit does not work for you either.
Can you try older kernel?

> --
> 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.

--
                        Gleb.