[Qemu-devel] How to investigate Qemu blank screen on target system problem?

[Robert Smith]

I've built kernel  v2.6.33.2 and tryintg to simulate realview (or integrator)  arm board on qemu under Ubuntu 9.10.

make ARCH=arm realview_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-
qemu-system-arm -M realview -kernel zImage.2.6.33.2.realview -initrd initramfs.cpio.gz

or

make ARCH=arm integrator_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-
qemu-system-arm -M integratorcp -kernel zImage.2.6.33.2.integrator -initrd initramfs.cpio.gz

In both cases I am getting blank Qemu screen on the target system.
Can anyone advise how to deal with and investigate such kind of problems?
Can I get any debug info from qemo why it stuck?

Thanks