diff -Nru livecd-rootfs-2.664.5/debian/changelog livecd-rootfs-2.664.6/debian/changelog
--- livecd-rootfs-2.664.5/debian/changelog	2020-08-04 19:39:27.000000000 +0000
+++ livecd-rootfs-2.664.6/debian/changelog	2020-08-26 21:06:31.000000000 +0000
@@ -1,3 +1,10 @@
+livecd-rootfs (2.664.6) focal; urgency=medium
+
+  [ Patrick Wu ]
+  * Fix xrdp support in hyper-v images.  LP: #1890980.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 26 Aug 2020 14:06:31 -0700
+
 livecd-rootfs (2.664.5) focal; urgency=medium
 
   [ Robert C Jennings ]
diff -Nru livecd-rootfs-2.664.5/live-build/ubuntu/hooks/040-hyperv-desktop-images.binary livecd-rootfs-2.664.6/live-build/ubuntu/hooks/040-hyperv-desktop-images.binary
--- livecd-rootfs-2.664.5/live-build/ubuntu/hooks/040-hyperv-desktop-images.binary	2020-08-04 19:32:16.000000000 +0000
+++ livecd-rootfs-2.664.6/live-build/ubuntu/hooks/040-hyperv-desktop-images.binary	2020-08-26 21:06:31.000000000 +0000
@@ -55,8 +55,8 @@
 
 CHANGED_FILE_SUFFIX=.replaced-by-desktop-img-build
 
-# use vsock transport.
-sed -i${CHANGED_FILE_SUFFIX} -e 's/use_vsock=false/use_vsock=true/g' "${scratch_d}/etc/xrdp/xrdp.ini"
+# use vsock transport
+sed -i${CHANGED_FILE_SUFFIX} -e 's/port=3389/port=vsock:\/\/-1:3389/g' "${scratch_d}/etc/xrdp/xrdp.ini"
 # use rdp security.
 sed -i${CHANGED_FILE_SUFFIX} -e 's/security_layer=negotiate/security_layer=rdp/g' "${scratch_d}/etc/xrdp/xrdp.ini"
 # remove encryption validation.
@@ -74,6 +74,9 @@
 EOF
 chmod a+x "${scratch_d}/etc/xrdp/startubuntu.sh"
 
+# set to use the system Window manager
+sed -i${CHANGED_FILE_SUFFIX} -e 's/EnableUserWindowManager=true/EnableUserWindowManager=0/g' "${scratch_d}/etc/xrdp/sesman.ini"
+
 # use the script to setup the ubuntu session
 sed -i${CHANGED_FILE_SUFFIX} -e 's/startwm/startubuntu/g' "${scratch_d}/etc/xrdp/sesman.ini"
 
@@ -100,6 +103,15 @@
 ResultActive=yes
 EOF
 
+cat >${scratch_d}/etc/polkit-1/localauthority/50-local.d/46-allow-update-repo.pkla <<EOF
+[Allow Package Management all Users]
+Identity=unix-user:*
+Action=org.freedesktop.packagekit.system-sources-refresh
+ResultAny=yes
+ResultInactive=yes
+ResultActive=yes
+EOF
+
 sed -i${CHANGED_FILE_SUFFIX} -e 's|After=|ConditionPathExists=!/var/lib/oem-config/run\nAfter=|g' "${scratch_d}/lib/systemd/system/xrdp.service"
 
 # End xrdp customisation