diff --git a/host/bins/cfc-0.1.0-x64.deb b/host/bins/cfc-0.1.0-x64.deb
index 183494d..0767c78 100644
Binary files a/host/bins/cfc-0.1.0-x64.deb and b/host/bins/cfc-0.1.0-x64.deb differ
diff --git a/host/src/pack/dpkg/etc/rc.civ.post b/host/src/pack/dpkg/etc/rc.civ.post
index 324ebb7..1509658 100755
--- a/host/src/pack/dpkg/etc/rc.civ.post
+++ b/host/src/pack/dpkg/etc/rc.civ.post
@@ -65,6 +65,6 @@ balloon_civ
 
 /opt/lg/bin/LG_B1_Client_clipboard guestClipboard:enable=true &
 
-pause_civ
+flock -n -x /var/lock/civ_startapp.lock pause_civ ||
 
 exit 0
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh b/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
index 313e57e..9182064 100755
--- a/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
+++ b/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
@@ -29,7 +29,9 @@ if [ "$num_start_app" -lt "1" ];
 then
     if ! systemctl --user is-active civ ;
     then
-        /opt/lg/bin/startapp
+        flock -x /var/lock/civ_startapp.lock /opt/lg/bin/startapp
+        # startapp might spwan a adb server which will hold the lock even after startapp exit, kill the adb server here to release the lock
+        adb kill-server
     fi
     # Resume CiV
     /opt/cfc/mwc/bin/resume_civ.sh
@@ -97,6 +99,9 @@ if [ ! -z ${ENABLE_CIV_BALLOON} ]; then
     fi
 fi
 
+# delay for guest to finish some tasks
+sleep 3
+
 # Pause CiV
 if [ -z "$(pidof mwc_launcher)" ] && [ -z "$(pidof LG_B1_Client)" ] && [ -z "$(pgrep -ax adb | grep -v "fork-server")" ]; then
     /opt/cfc/mwc/bin/pause_civ.sh
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/penguin-peak.ini b/host/src/pack/dpkg/opt/cfc/mwc/bin/penguin-peak.ini
index c967792..40d60a3 100644
--- a/host/src/pack/dpkg/opt/cfc/mwc/bin/penguin-peak.ini
+++ b/host/src/pack/dpkg/opt/cfc/mwc/bin/penguin-peak.ini
@@ -36,5 +36,5 @@ time_keep=
 pm_control=
 
 [extra]
-cmd=-display egl-headless -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass0 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass1 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass2 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass3 -device vhost-vsock-pci,id=vhost-vsock-pci0,guest-cid=3 -device ivshmem-plain,memdev=ivshmem0,bus=pcie.0 -object memory-backend-file,id=ivshmem0,share=on,mem-path=/dev/shm/looking-glass0,size=32M -device ivshmem-plain,memdev=ivshmem1,bus=pcie.0 -object memory-backend-file,id=ivshmem1,share=on,mem-path=/dev/shm/looking-glass1,size=32M -device ivshmem-plain,memdev=ivshmem2,bus=pcie.0 -object memory-backend-file,id=ivshmem2,share=on,mem-path=/dev/shm/looking-glass2,size=32M -device ivshmem-plain,memdev=ivshmem3,bus=pcie.0 -object memory-backend-file,id=ivshmem3,share=on,mem-path=/dev/shm/looking-glass3,size=32M -spice port=5900,disable-ticketing -drive file=/home/kylin/civ/.userdata/username.img,if=none,id=disk2 -device virtio-blk-pci,drive=disk2,bootindex=2 -virtfs local,path=/home/kylin/Android/Pictures,mount_tag=Pictures9p,security_model=none -virtfs local,path=/home/kylin/Android/Download,mount_tag=Download9p,security_model=none -device virtio-balloon
+cmd=-display egl-headless -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass0 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass1 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass2 -device virtio-input-host-pci,evdev=/dev/input/by-id/input-looking-glass3 -device ivshmem-plain,memdev=ivshmem0,bus=pcie.0 -object memory-backend-file,id=ivshmem0,share=on,mem-path=/dev/shm/looking-glass0,size=32M -device ivshmem-plain,memdev=ivshmem1,bus=pcie.0 -object memory-backend-file,id=ivshmem1,share=on,mem-path=/dev/shm/looking-glass1,size=32M -device ivshmem-plain,memdev=ivshmem2,bus=pcie.0 -object memory-backend-file,id=ivshmem2,share=on,mem-path=/dev/shm/looking-glass2,size=32M -device ivshmem-plain,memdev=ivshmem3,bus=pcie.0 -object memory-backend-file,id=ivshmem3,share=on,mem-path=/dev/shm/looking-glass3,size=32M -spice port=5900,disable-ticketing -drive file=/home/kylin/civ/.userdata/username.img,if=none,id=disk2 -device virtio-blk-pci,drive=disk2,bootindex=2 -virtfs local,path=/home/kylin/Android/Pictures,mount_tag=Pictures9p,security_model=none -virtfs local,path=/home/kylin/Android/Download,mount_tag=Download9p,security_model=none -device virtio-balloon
 service=/opt/civ/data/Release_Deb/scripts/lg-input-manager;
diff --git a/host/src/pack/dpkg/var/lock/civ_startapp.lock b/host/src/pack/dpkg/var/lock/civ_startapp.lock
new file mode 100644
index 0000000..e69de29