diff --git a/overlay/common/etc/adduser.conf b/overlay/common/etc/adduser.conf
index 948d2f5..ae028a1 100644
--- a/overlay/common/etc/adduser.conf
+++ b/overlay/common/etc/adduser.conf
@@ -74,7 +74,7 @@ SKEL_IGNORE_REGEX="dpkg-(old|new|dist|save)"
 # new users to other groups.
 # This is the list of groups that new non-system users will be added to
 # Default:
-EXTRA_GROUPS="audio video sudo aid_system aid_graphics aid_input aid_audio aid_net_bt_admin aid_net_bt aid_inet aid_inet_raw aid_inet_admin"
+EXTRA_GROUPS="audio input video sudo dialout aid_media aid_system aid_graphics aid_input aid_audio aid_net_bt_admin aid_net_bt aid_inet aid_inet_raw aid_inet_admin"
 
 # If ADD_EXTRA_GROUPS is set to something non-zero, the EXTRA_GROUPS
 # option above will be default behavior for adding new, non-system users
diff --git a/scripts/setup-user.sh b/scripts/setup-user.sh
index fec2500..53c2841 100755
--- a/scripts/setup-user.sh
+++ b/scripts/setup-user.sh
@@ -219,10 +219,9 @@ groupadd --gid 9999 aid_nobody
 useradd --gid 9999 --no-create-home --home-dir /nonexistent --no-user-group --system --shell /usr/sbin/nologin --uid 9999 aid_nobody
 
 groupadd -g 100000 cosmo
-useradd -m -u 100000 -g 100000 -G audio,input,video,sudo,aid_system,aid_graphics,aid_input,aid_audio,aid_net_bt_admin,aid_net_bt,aid_inet,aid_net_raw,aid_net_admin -s /bin/bash cosmo
+useradd -m -u 100000 -g 100000 -G audio,input,video,sudo,dialout,aid_media,aid_system,aid_graphics,aid_input,aid_audio,aid_net_bt_admin,aid_net_bt,aid_inet,aid_net_raw,aid_net_admin -s /bin/bash cosmo
 echo cosmo:cosmo | chpasswd
 
 usermod systemd-timesync -a -G aid_inet
 usermod avahi -a -G aid_inet
 sudo usermod pulse -a -G aid_media
-sudo usermod cosmo -a -G aid_media