diff --git a/ac108.c b/ac108.c
index d4f4dde..ee5f3fd 100644
--- a/ac108.c
+++ b/ac108.c
@@ -1436,8 +1436,8 @@ static int ac108_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *i
 	if (of_property_read_u32(np, "tdm-chips-count", &val)) val = 1;
 	ac10x->tdm_chips_cnt = val;
 
-	pr_err(" ac10x i2c_id number: %d\n", index);
-	pr_err(" ac10x data protocol: %d\n", ac10x->data_protocol);
+	pr_info(" ac10x i2c_id number: %d\n", index);
+	pr_info(" ac10x data protocol: %d\n", ac10x->data_protocol);
 
 	ac10x->i2c[index] = i2c;
 	ac10x->i2cmap[index] = devm_regmap_init_i2c(i2c, &ac108_regmap);
@@ -1459,7 +1459,7 @@ static int ac108_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *i
 	ac10x_fill_regcache(&i2c->dev, ac10x->i2cmap[index]);
 
 	ac10x->codec_cnt++;
-	pr_err(" ac10x codec count  : %d\n", ac10x->codec_cnt);
+	pr_info(" ac10x codec count  : %d\n", ac10x->codec_cnt);
 
 	ret = sysfs_create_group(&i2c->dev.kobj, &ac108_debug_attr_group);
 	if (ret) {
diff --git a/install.sh b/install.sh
index 1252048..3268e69 100755
--- a/install.sh
+++ b/install.sh
@@ -31,14 +31,19 @@ fi
 # - check for /boot/overlays
 # - dtparam and dtoverlay is available
 errorFound=0
-if [ ! -d /boot/overlays ] ; then
-  echo "/boot/overlays not found or not a directory" 1>&2
+OVERLAYS=/boot/overlays
+[ -d /boot/firmware/overlays ] && OVERLAYS=/boot/firmware/overlays
+
+if [ ! -d $OVERLAYS ] ; then
+  echo "$OVERLAYS not found or not a directory" 1>&2
   errorFound=1
 fi
 # should we also check for alsactl and amixer used in seeed-voicecard?
+PATH=$PATH:/opt/vc/bin
 for cmd in dtparam dtoverlay ; do
   if ! which $cmd &>/dev/null ; then
     echo "$cmd not found" 1>&2
+    echo "You may need to run ./ubuntu-prerequisite.sh"
     errorFound=1
   fi
 done
@@ -77,7 +82,7 @@ function check_kernel_headers() {
 
   # echo RUN=$VER_RUN HDR=$VER_HDR
   echo " !!! Your kernel version is $VER_RUN"
-  echo "     Not found *** coressponding *** kernel headers with apt-get."
+  echo "     Not found *** corresponding *** kernel headers with apt-get."
   echo "     This may occur if you have ran 'rpi-update'."
   echo " Choose  *** y *** will revert the kernel to version $VER_HDR then continue."
   echo " Choose  *** N *** will exit without this driver support, by default."
@@ -110,7 +115,8 @@ fi
 # it's just been updated)
 base_ver=$(get_kernel_version)
 base_ver=${base_ver%%[-+]*}
-kernels="${base_ver}+ ${base_ver}-v7+ ${base_ver}-v7l+"
+#kernels="${base_ver}+ ${base_ver}-v7+ ${base_ver}-v7l+"
+kernels=$(uname -r)
 
 function install_module {
   local _i
@@ -144,9 +150,9 @@ install_module "./" "seeed-voicecard"
 
 
 # install dtbos
-cp seeed-2mic-voicecard.dtbo /boot/overlays
-cp seeed-4mic-voicecard.dtbo /boot/overlays
-cp seeed-8mic-voicecard.dtbo /boot/overlays
+cp seeed-2mic-voicecard.dtbo $OVERLAYS
+cp seeed-4mic-voicecard.dtbo $OVERLAYS
+cp seeed-8mic-voicecard.dtbo $OVERLAYS
 
 #install alsa plugins
 # no need this plugin now
@@ -162,13 +168,16 @@ grep -q "^snd-soc-wm8960$" /etc/modules || \
   echo "snd-soc-wm8960" >> /etc/modules  
 
 #set dtoverlays
-sed -i -e 's:#dtparam=i2c_arm=on:dtparam=i2c_arm=on:g'  /boot/config.txt || true
-grep -q "^dtoverlay=i2s-mmap$" /boot/config.txt || \
-  echo "dtoverlay=i2s-mmap" >> /boot/config.txt
+CONFIG=/boot/config.txt
+[ -f /boot/firmware/usercfg.txt ] && CONFIG=/boot/firmware/usercfg.txt
+
+sed -i -e 's:#dtparam=i2c_arm=on:dtparam=i2c_arm=on:g'  $CONFIG || true
+grep -q "^dtoverlay=i2s-mmap$" $CONFIG || \
+  echo "dtoverlay=i2s-mmap" >> $CONFIG
 
 
-grep -q "^dtparam=i2s=on$" /boot/config.txt || \
-  echo "dtparam=i2s=on" >> /boot/config.txt
+grep -q "^dtparam=i2s=on$" $CONFIG || \
+  echo "dtparam=i2s=on" >> $CONFIG
 
 #install config files
 mkdir /etc/voicecard || true
diff --git a/seeed-voicecard b/seeed-voicecard
index 5c9fa16..f8c3986 100755
--- a/seeed-voicecard
+++ b/seeed-voicecard
@@ -127,7 +127,7 @@ if [ "$overlay" ]; then
 
     # TODO: dynamic dtoverlay Bug of v4.19.x
     #       no DT node phandle inserted.
-    if [[ "$kernel_ver" =~ ^4\.19.*$ ]]; then
+    if [[ "$kernel_ver" =~ ^4\.19.*$ || "$kernel_ver" =~ ^5\.*$ ]]; then
         for i in $RPI_HATS; do
             if [ "$i" == "$overlay" ]; then
                 do_overlay $overlay 0
@@ -150,5 +150,6 @@ fi
 alsactl restore
 
 #Force 3.5mm ('headphone') jack
-amixer -c 1 cset numid=3 1 || true
-
+if [[ "$kernel_ver" =~ ^4\.*$ ]]; then
+    amixer cset numid=3 1 || true
+fi
diff --git a/ubuntu-prerequisite.sh b/ubuntu-prerequisite.sh
new file mode 100755
index 0000000..f938a7a
--- /dev/null
+++ b/ubuntu-prerequisite.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Copyright (c) Hin-Tak Leung 2020
+#
+# Overview:
+#   This script compiles and install the Broadcom VideoCore tools,
+#   configure the dynamic loader for the non-standard library location,
+#   and update the loader cache.
+#
+#   A few steps explicitly requires root privilege, which are
+#   marked with "sudo". The rest is just checking for duplicate/previous
+#   action.
+#
+#   This derived from my command history on ubuntu 20.04.1 .YMMV
+
+sudo apt install -y git gcc make alsa-utils cmake
+
+git clone git://github.com/raspberrypi/userland.git
+pushd userland/
+
+arch=$(uname -m)
+if [[ "$arch" =~ aarch64 ]]; then
+    ./buildme --aarch64
+else
+    ./buildme
+fi
+# ./buildme already includes "sudo make install" at the end
+
+popd
+
+# matches Raspbian's location:
+if [ ! -f /etc/ld.so.conf.d/00-vmcs.conf ] ; then
+    echo "/opt/vc/lib" | sudo tee -a /etc/ld.so.conf.d/00-vmcs.conf
+    sudo ldconfig -v
+else
+    echo "/etc/ld.so.conf.d/00-vmcs.conf exists - no need to update ld.cache!"
+fi