diff --git a/server.c b/server.c
index a282c53..6c47232 100644
--- a/server.c
+++ b/server.c
@@ -81,40 +81,12 @@ static inline void convert_kmsbuf(const int XSTRIPE, const int YSTRIPE, const ch
     convert_bgrx_to_rgb(kms_convert_buf, width, height, buff);
 }
 
-static size_t get_extra_mmap_bytes(const int XSTRIPE, const int YSTRIPE, int width, int height) {
-    if (height % YSTRIPE) {
-        int offset_max = 0;
-        for (int y = 0; y < height; y++) {
-            for (int x = 0; x < width; x++)
-            {
-                int sno = (x / XSTRIPE) + (y / YSTRIPE) * (width / XSTRIPE);
-                int ord = (x % XSTRIPE) + (y % YSTRIPE) * XSTRIPE;
-                int offset = sno * XSTRIPE * YSTRIPE + ord;
-                if (offset > offset_max) {
-                    offset_max = offset;
-                }
-            }
-        }
-        return offset_max * 4 - height*width * 4;
-    }
-    else {
-        return 0;
-    }
-}
 #define XSTRIPE_INTEL 128
 #define YSTRIPE_INTEL 8
 #define XSTRIPE_NVIDIA 16
 #define YSTRIPE_NVIDIA 128
-#define XSTRIPE_INTEL 16
-#define YSTRIPE_INTEL 128
-static size_t get_nvidia_extra_mmap_bytes(int width, int height) {
-    return get_extra_mmap_bytes(XSTRIPE_NVIDIA, YSTRIPE_NVIDIA, width, height);
-}
-static size_t get_intel_extra_mmap_bytes(int width, int height) {
-    return get_extra_mmap_bytes(XSTRIPE_NVIDIA, YSTRIPE_NVIDIA, width, height);
-}
 static void convert_nvidia_kmsbuf(const char* in, int width, int height, char* buff) {
-    convert_kmsbuf(XSTRIPE_INTEL, YSTRIPE_INTEL, in, width, height, buff);
+    convert_kmsbuf(XSTRIPE_NVIDIA, YSTRIPE_NVIDIA, in, width, height, buff);
 }
 static void convert_intel_kmsbuf(const char* in, int width, int height, char* buff) {
     convert_kmsbuf(XSTRIPE_INTEL, YSTRIPE_INTEL, in, width, height, buff);
@@ -456,7 +428,6 @@ int main(int argc, const char **argv)
 
     if (strcmp(drm_ver->name, "i915") == 0) {
         funcs.convert = &convert_intel_kmsbuf;
-        mmap_size += get_intel_extra_mmap_bytes(fb->width, fb->height);
     }
     else if (strcmp(drm_ver->name, "amdgpu") == 0) {
         struct drm_gem_flink flink;
@@ -485,7 +456,6 @@ int main(int argc, const char **argv)
     else if (strcmp(drm_ver->name, "nvidia-drm") == 0) {
         // quirky and slow
         funcs.convert = &convert_nvidia_kmsbuf;
-        mmap_size += get_nvidia_extra_mmap_bytes(fb->width, fb->height);
     }
     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
@@ -507,7 +477,9 @@ int main(int argc, const char **argv)
 
     size_t buflen = fb->width * fb->height * 32 / 8;
     char *buf = malloc(buflen);
+    char *buf2 = malloc(buflen);
     memset(buf, 0, buflen);
+    memset(buf2, 0, buflen);
 
     resolution.x = fb->width;
     resolution.y = fb->height;
@@ -528,8 +500,9 @@ int main(int argc, const char **argv)
     while (rfbIsActive(server)) {
         if (server->clientHead && TimeToTakePicture()) {
             funcs.sync_start(primefd);
-            funcs.convert(mapped, fb->width, fb->height, buf);
+            memcpy(buf2, mapped, buflen);
             funcs.sync_end(primefd);
+            funcs.convert(buf2, fb->width, fb->height, buf);
             rfbMarkRectAsModified(server, 0, 0, fb->width, fb->height);
         }
     }