diff --git a/x11docker b/x11docker
index ca8ce399..610024e9 100644
--- a/x11docker
+++ b/x11docker
@@ -9,9 +9,11 @@
 # Type 'x11docker --help' or scroll down to read usage information.
 # https://github.com/mviereck/x11docker
 
-Version="3.8.0"
+Version="3.8.1"
 
 changelog() {
+# 10.12.2017 V3.8.1     bugfix Ubuntu: avoid Wayland backend for Weston due to MIR issue #19
+#                       --xorg: change Xorg to X. X is setuid wrapper for Xorg on Ubuntu 14.04
 # 04.12.2017 V3.8.0     --sudouser: create user with docker run options instead of createuser script
 #                       --sudouser: create /etc/sudoers.d/$Benutzer with docker exec in dockerrc
 # 03.12.2017            --sudouser: create /etc/sudoers.d/$Benutzer instead of adding groups wheel and sudo
@@ -2383,7 +2385,7 @@ fi
     *)
       Xserveroptions="$Xserveroptions -retro"
       Xserveroptions="$Xserveroptions \\
-  +extension Composite +extension RANDR +extension RENDER +extension GLX +iglx \\
+  +extension Composite +extension RANDR +extension RENDER +extension GLX \\
   +extension XVideo +extension DOUBLE-BUFFER"
       Xserveroptions="$Xserveroptions \\
   -extension X-Resource +extension SECURITY +extension DAMAGE"
@@ -2498,7 +2500,7 @@ startup-animation=fade
 [keyboard]
 keymap_layout=$( [ "$Tty" = "yes" ] && cat /etc/default/keyboard | grep XKBLAYOUT | cut -d= -f2 | cut -d'"' -f2)
 " >> "$Westonini"
-      [ -n "$Hostwayland" ] &&  [ "$Xserver" != "--xpra-xwayland" ] && {
+      [ -n "$Hostwayland" ] &&  [ "$Xserver" != "--xpra-xwayland" ] && [ "$Hostsystem" != "ubuntu" ] && {
         Westonoutput="WL"
       } || {
         [ -n "$Hostdisplay" ] && Westonoutput="X"
@@ -2527,7 +2529,7 @@ $(tail "$Compositorlogfile")"
       Xserveroptions="$Xserveroptions \\
   -verbose"                  # make X verbose
       [ "$Tty" = "yes" ] && Xserveroptions="$Xserveroptions -keeptty"
-      Xcommand="$(command -v Xorg) $Newdisplay $Newxvt \\
+      Xcommand="$(command -v X) $Newdisplay $Newxvt \\
   $Xserveroptions"
       warning "Although x11docker starts Xorg as unprivileged user,
   most system setups wrap Xorg to give it root permissions (setuid).
@@ -2602,12 +2604,10 @@ $(tail "$Compositorlogfile")"
       echo "mode=$Screensize" >> $Westonini
       [ -n "$Customwestonini" ] && Westonini="$Customwestonini"
       Compositorcommand="weston --config='$Westonini' --socket=$Waylandsocket"
-      case $Tty in
-        yes) Compositorcommand="$Compositorcommand --backend=drm-backend.so" ;;
-        no)  
-          [ -n "$Hostwayland" ] && Compositorcommand="$Compositorcommand --backend=wayland-backend.so" 
-          [ -z "$Hostwayland" ] && [ -n "$Hostdisplay" ] && Compositorcommand="$Compositorcommand --backend=x11-backend.so" 
-        ;;
+      case $Westonoutput in
+        WL) Compositorcommand="$Compositorcommand --backend=wayland-backend.so" ;;
+        X)  Compositorcommand="$Compositorcommand --backend=x11-backend.so" ;;
+        *)  Compositorcommand="$Compositorcommand --backend=drm-backend.so" ;; 
       esac
     ;;
     
@@ -2630,15 +2630,12 @@ mode=$Screensize
       done
       [ -n "$Customwestonini" ] && Westonini="$Customwestonini"
       Compositorcommand="weston --socket=$Waylandsocket --config='$Westonini'"
-      [ "$Tty" = "yes" ] && Compositorcommand="$Compositorcommand --backend=drm-backend.so"
       [ "$Fullscreen" = "yes" ] && Compositorcommand="$Compositorcommand --fullscreen"
       [ "$Outputcount" = "1" ]  || Compositorcommand="$Compositorcommand --output-count=$Outputcount"
-      case $Tty in
-        yes) Compositorcommand="$Compositorcommand --backend=drm-backend.so" ;;
-        no)  
-          [ -n "$Hostwayland" ] && Compositorcommand="$Compositorcommand --backend=wayland-backend.so" 
-          [ -z "$Hostwayland" ] && [ -n "$Hostdisplay" ] && Compositorcommand="$Compositorcommand --backend=x11-backend.so" 
-        ;;
+      case $Westonoutput in
+        WL) Compositorcommand="$Compositorcommand --backend=wayland-backend.so" ;;
+        X)  Compositorcommand="$Compositorcommand --backend=x11-backend.so" ;;
+        *)  Compositorcommand="$Compositorcommand --backend=drm-backend.so" ;; 
       esac
     ;;
     
@@ -3694,7 +3691,7 @@ WantedBy=x11docker.target
         echo "note \"Panning \$Screensize. If virtual screen is greater than "
         echo "  maximal screen size, you can move virtual screen with mouse at screen edges."
         echo "  You can force the virtual screen to match your monitor with option --scale=1\""
-        echo "  xrandr --output \$Output --panning \$Screensize+0+0/\$Screensize+0+0/100/100/100/100"
+        echo "xrandr --output \$Output --panning \$Screensize+0+0/\$Screensize+0+0/100/100/100/100"
         echo "checkscreensize || {"
         echo "  note 'Panning failed, trying to scale instead.'"
         echo "  xrandr --output \$Output --scale-from \$Screensize --panning \$Screensize+0+0/\$Screensize+0+0"