Merge pull request #3248 from canonical/ignore-zero-length-gamma

Ignore zero length gamma curves
canonical · Feb 23, 2024 · bd0feb1 · bd0feb1
2 parents d0a68ae + 0a89793
commit bd0feb1
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/platforms/gbm-kms/server/kms/real_kms_output.cpp b/src/platforms/gbm-kms/server/kms/real_kms_output.cpp
@@ -360,6 +360,12 @@ void mgg::RealKMSOutput::set_power_mode(MirPowerMode mode)
 
 void mgg::RealKMSOutput::set_gamma(mg::GammaCurves const& gamma)
 {
+    if (!gamma.red.size())
+    {
+        mir::log_warning("Ignoring attempt to set zero length gamma");
+        return;
+    }
+
     if (!ensure_crtc())
     {
         mir::log_warning("Output %s has no associated CRTC to set gamma on",