output: refuse to enable with zero mode
This can happen if the compositor enables an output without
picking a mode, or performs a modeset with a zero width/height.
@@ -547,6 +547,16 @@ static bool output_basic_test(struct wlr_output *output) {
enabled = output->pending.enabled;
}
+ if (enabled && (output->pending.committed & (WLR_OUTPUT_STATE_ENABLED |
+ WLR_OUTPUT_STATE_MODE))) {
+ int pending_width, pending_height;
+ output_pending_resolution(output, &pending_width, &pending_height);
+ if (pending_width == 0 || pending_height == 0) {
+ wlr_log(WLR_DEBUG, "Tried to enable an output with a zero mode");
+ return false;
+ }
+ }
+
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
wlr_log(WLR_DEBUG, "Tried to commit a buffer on a disabled output");
return false;
