diff --git a/run/run.sh b/run/run.sh
index 01e6ab1..fc2cc8a 100755
--- a/run/run.sh
+++ b/run/run.sh
@@ -49,17 +49,22 @@ if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
   fi
 fi
 
-[ -z "${KVM_OPTS}" ] && echo "Error: KVM acceleration is disabled.." && exit 88
+if [ -z "${KVM_OPTS}" ]; then
+  KVM_OPTS="-machine usb=off"
+  if [ "$DEBUG" != "Y" ]; then
+    echo "Error: KVM acceleration is disabled.." && exit 88
+  fi
+fi
 
-DEF_OPTS="-nographic"
 RAM_OPTS=$(echo "-m ${RAM_SIZE}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
 CPU_OPTS="-smp ${CPU_CORES},sockets=1,cores=${CPU_CORES},threads=1"
-EXTRA_OPTS="-device virtio-balloon-pci,id=balloon0,bus=pcie.0,addr=0x4 -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0"
+DEF_OPTS="-nographic -nodefaults -pidfile ${_QEMU_PID} -overcommit mem-lock=off"
+EXTRA_OPTS="-device virtio-balloon-pci,id=balloon0 -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0"
 ARGS="${DEF_OPTS} ${CPU_OPTS} ${RAM_OPTS} ${KVM_OPTS} ${MON_OPTS} ${SERIAL_OPTS} ${NET_OPTS} ${DISK_OPTS} ${EXTRA_OPTS}"
 
 set -m
 (
-  qemu-system-x86_64 ${ARGS} & echo $! > ${_QEMU_PID}
+  qemu-system-x86_64 ${ARGS} &
 )
 set +m