diff --git a/qubes-rpc/gui-fatal.c b/qubes-rpc/gui-fatal.c
index 02238dd2..c3de7f1f 100644
--- a/qubes-rpc/gui-fatal.c
+++ b/qubes-rpc/gui-fatal.c
@@ -37,16 +37,13 @@ static void produce_message(const char *type, const char *fmt, va_list args)
         case 0:
             if (geteuid() == 0) {
                 if (setuid(getuid()) != 0) {
-                    perror("setuid failed, not calling kdialog/zenity");
+                    perror("setuid failed, not calling zenity/kdialog");
                     exit(1);
                 }
             }
             fix_display();
-#ifdef USE_KDIALOG
-            execlp("/usr/bin/kdialog", "kdialog", "--sorry", dialog_msg, NULL);
-#else
             execlp("/usr/bin/zenity", "zenity", "--error", "--text", dialog_msg, NULL);
-#endif
+            execlp("/usr/bin/kdialog", "kdialog", "--sorry", dialog_msg, NULL);
             exit(1);
         default:;
         }
diff --git a/qubes-rpc/qvm-copy-to-vm.gnome b/qubes-rpc/qvm-copy-to-vm.gnome
index 1a5725b6..cc7f6926 100755
--- a/qubes-rpc/qvm-copy-to-vm.gnome
+++ b/qubes-rpc/qvm-copy-to-vm.gnome
@@ -21,8 +21,19 @@
 
 set -e -o pipefail
 
+set_qdbus() {
+    for cmd in qdbus qdbus-qt{6,5}; do
+        type "$cmd" >&2 || continue
+        qdbus=$cmd
+        return 0
+    done
+
+    unset qdbus
+    return 1
+}
+
 copy() {
-    /usr/lib/qubes/qrexec-client-vm @default \
+    PROGRESS_TYPE=gui /usr/lib/qubes/qrexec-client-vm @default \
         qubes.Filecopy /usr/lib/qubes/qfile-agent "$@"
 }
 
@@ -33,11 +44,10 @@ progress_kdialog() {
         if [[ $pos == 0 ]]; then
             # shellcheck disable=SC2207
             ref=( $(kdialog --progressbar "$DESCRIPTION") )
-            trap 'qdbus "${ref[@]}" close' EXIT  # for this subshell
-            qdbus "${ref[@]}" Set "" maximum "$SIZE"
+            trap '"$qdbus" "${ref[@]}" close' EXIT  # for this subshell
         fi
 
-        qdbus "${ref[@]}" Set "" value "$pos"
+        "$qdbus" "${ref[@]}" value $((100 * pos / SIZE))
     done) >/dev/null  # hide qdbus's empty output lines
 }
 
@@ -79,11 +89,11 @@ else
 fi
 
 if [[ $SIZE == 0 ]]; then
-    PROGRESS_TYPE=none copy "$@"
-elif [[ $0 == *.kde ]] && type kdialog qdbus >/dev/null; then
-    PROGRESS_TYPE=gui  copy "$@" | progress_kdialog
+    copy "$@" >/dev/null
+elif [[ $0 == *.kde ]] && type kdialog >/dev/null && set_qdbus; then
+    copy "$@" | progress_kdialog
 elif type zenity >/dev/null; then
-    PROGRESS_TYPE=gui  copy "$@" | progress_zenity
+    copy "$@" | progress_zenity
 else
-    PROGRESS_TYPE=none copy "$@"
+    copy "$@" >/dev/null
 fi