I launch qemu using this script... you can likely take it and save some time:
export QEMU_AUDIO_DRV=sdl
export SDL_AUDIODRIVER=alsa
qemu-kvm --enable-kvm -localtime -m 2G -sdl -display sdl -vga vmware -usbdevice tablet -smp 2 -net nic,model=virtio -net user -drive file=VirtualDrives/slackware64-14.1-ansaldo.img,cache=none,if=ide &
#-cdrom VirtualDrives/slackware64-14.1-install-dvd.iso
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