added a VGA wait for retrace in graphics mode

1 files changed, 4 insertions, 2 deletions

diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c
index eff6a4c..babb6e0 100644
--- a/src/kernel/kernel.c
+++ b/src/kernel/kernel.c
@@ -144,9 +144,11 @@ void kernel_main( void )
 				break;
 
 			case MODE_GRAPHICS:
-//				interrupts_disable( );
+				// wait for VGA retrace, assume drawing the desktop
+				// is fast enough to finish in time (so we don't recheck
+				// for retrace)
+				vga_wait_for_retrace( &global_context.vga );
 				((widget_vtable_t *)global_context.desktop.vtable)->draw( &global_context.desktop, &global_context.vga );
-//				interrupts_enable( );
 				break;
 		}		
 	}