Initial revision

src/iface-unknown.c

@@ -0,0 +1,29 @@
+// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "gtkhelper.h"
+#include "iface-unknown.h"
+
+GtkWidget *create_iface_unknown_main(void) {
+  GtkWidget *label = gtk_label_new(
+    "Sorry, I don’t recognise the controls on this card.\n\n"
+
+    "These Focusrite Scarlett models should be supported:\n"
+    "– Gen 2: 6i6/18i8/18i20\n"
+    "– Gen 3: Solo/2i2/4i4/8i6/18i8/18i20\n\n"
+
+    "Are you running a recent kernel with Scarlett Gen 2/3 support "
+    "enabled?\n\n"
+
+    "Check dmesg output for “Focusrite Scarlett Gen 2/3 Mixer "
+    "Driver”:\n\n"
+
+    "dmesg | grep Scarlett\n\n"
+
+    "You may need to create a file /etc/modprobe.d/scarlett.conf\n"
+    "with an “options snd_usb_audio ...” line and reboot."
+  );
+  gtk_widget_set_margin(label, 30);
+
+  return label;
+}