diff --git a/server.c b/server.c
index 21795c8..f84b689 100644
--- a/server.c
+++ b/server.c
@@ -267,7 +267,7 @@ static void rfb_ptr_hook(int mask, int screen_x, int screen_y, rfbClientPtr cl)
         	{
         		.type = EV_REL,
         		.code = REL_WHEEL,
-        		.value = mask & 0b1000 ? -1 : 1,
+        		.value = mask & 0b1000 ? 1 : -1,
         	},
         	{
         		.type = EV_SYN,
@@ -424,16 +424,11 @@ int main(int argc, const char **argv)
     }
     else {
         if (strcmp(drm_ver->name, "nvidia-drm") == 0) {
-            // quirky
+            // quirky and slow
             convert_func = &convert_nv_stripe;
             vblank_func = &drm_wait_vblank_noop;
         }
-        else if (strcmp(drm_ver->name, "vmwgfx") == 0) {
-        }
-        else if (strcmp(drm_ver->name, "vboxvideo") == 0) {
-            vblank_func = &drm_wait_vblank_noop;
-        }
-        else if (strcmp(drm_ver->name, "virtio_gpu") == 0) {
+        else if (strcmp(drm_ver->name, "vmwgfx") == 0 || strcmp(drm_ver->name, "vboxvideo") == 0 || strcmp(drm_ver->name, "virtio_gpu") == 0) {
             // virgl does not work
             vblank_func = &drm_wait_vblank_noop;
         }