X-Git-Url: http://git.code-monkey.de/?p=pulseview.git;a=blobdiff_plain;f=pv%2Ftoolbars%2Fmainbar.cpp;h=d78a153f160d0f14e45969572cfe671269ba07f0;hp=16888624bc2f124030005fc481ae6838f5adbba5;hb=220801e96260f1f2a7bc23282ddf69955be91799;hpb=bc4b9ccfc78d9d0987525360fa6d93bed681951a

diff --git a/pv/toolbars/mainbar.cpp b/pv/toolbars/mainbar.cpp
index 1688862..d78a153 100644
--- a/pv/toolbars/mainbar.cpp
+++ b/pv/toolbars/mainbar.cpp
@@ -302,17 +302,21 @@ void MainBar::update_sample_rate_selector()
 
 	const shared_ptr<sigrok::Device> sr_dev = device->device();
 
-	try {
-		auto gvar = sr_dev->config_get(ConfigKey::EXTERNAL_CLOCK);
-		if (gvar.gobj()) {
-			bool value = Glib::VariantBase::cast_dynamic<Glib::Variant<bool>>(
-				gvar).get();
-			sample_rate_.allow_user_entered_values(value);
+	sample_rate_.allow_user_entered_values(false);
+	if (sr_dev->config_check(ConfigKey::EXTERNAL_CLOCK, Capability::GET)) {
+		try {
+			auto gvar = sr_dev->config_get(ConfigKey::EXTERNAL_CLOCK);
+			if (gvar.gobj()) {
+				bool value = Glib::VariantBase::cast_dynamic<Glib::Variant<bool>>(
+					gvar).get();
+				sample_rate_.allow_user_entered_values(value);
+			}
+		} catch (Error& error) {
+			// Do nothing
 		}
-	} catch (Error& error) {
-		// Do nothing
 	}
 
+
 	if (sr_dev->config_check(ConfigKey::SAMPLERATE, Capability::LIST)) {
 		try {
 			gvar_dict = sr_dev->config_list(ConfigKey::SAMPLERATE);