I had the same problem. Ubuntu 9.04
uname -a Linux wifihack 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux
qemu QEMU PC emulator version 0.10.0,
qemu -s -hda /dev/zero -kernel /mnt/build/linux-2.6.30/arch/x86/boot/bzImage
I had the same problem. Ubuntu 9.04
uname -a
Linux wifihack 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686 GNU/Linux
qemu
QEMU PC emulator version 0.10.0,
qemu -s -hda /dev/zero -kernel /mnt/build/ linux-2. 6.30/arch/ x86/boot/ bzImage