diff --git a/files/console/usr/bin/bc250-sunshine-autostart b/files/console/usr/bin/bc250-sunshine-autostart
index 96df4bb..2c5c960 100644
--- a/files/console/usr/bin/bc250-sunshine-autostart
+++ b/files/console/usr/bin/bc250-sunshine-autostart
@@ -6,4 +6,14 @@
 [ -r /etc/bc250-console.conf ] && . /etc/bc250-console.conf
 [ "$(id -un)" = "${CONSOLE_KID_USER:-kid}" ] || exit 0
 flatpak info dev.lizardbyte.app.Sunshine >/dev/null 2>&1 || exit 0
+
+# BC-250 has no video-encode hardware, and Sunshine SEGFAULTS probing the
+# Vulkan H.264 encoder on this GPU (crash loop, exit 139). Seed the config
+# with the software encoder before first start; never clobber user edits.
+SUNSHINE_CONF="$HOME/.var/app/dev.lizardbyte.app.Sunshine/config/sunshine/sunshine.conf"
+if [ ! -e "$SUNSHINE_CONF" ]; then
+    mkdir -p "$(dirname "$SUNSHINE_CONF")"
+    echo "encoder = software" > "$SUNSHINE_CONF"
+fi
+
 exec systemctl --user enable --now app-dev.lizardbyte.app.Sunshine.service