diff --git a/src/setup.py b/src/setup.py
index 4097c2a099..7d63ca94e0 100755
--- a/src/setup.py
+++ b/src/setup.py
@@ -1096,7 +1096,7 @@ def add_DLLs(*dll_names):
 
             #list of DLLs we want to include, without the "lib" prefix, or the version and extension
             #(ie: "libatk-1.0-0.dll" -> "atk")
-            add_DLLs('atk', 'cairo-gobject',
+            add_DLLs('atk', 'cairo-gobject', 'cairo',
                      'dbus', 'dbus-glib', 'gdk', 'gdk_pixbuf', 'openraw',
                      'gdkglext', 'gio', 'girepository', 'glib',
                      'gnutls', 'gobject', 'gthread',
@@ -1105,7 +1105,7 @@ def add_DLLs(*dll_names):
                      'p11-kit', 'proxy',
                      'pango', 'pangocairo', 'pangoft2', 'pangowin32',
                      'png16',
-                     'rsvg', 'webp',
+                     'rsvg', 'webp', "iconv",
                      'winpthread',
                      'zzz')
             #this one may be missing in pygi-aio 3.14?
@@ -1440,6 +1440,9 @@ def add_keywords(path_dirs=[], inc_dirs=[], lib_dirs=[], libs=[], noref=True, no
         elif "cairo" in pkgs_options:
             add_to_keywords(kw, 'include_dirs', GTK_INCLUDE_DIR, cairo_include_dir)
             add_to_keywords(kw, 'libraries', "cairo")
+            if PYTHON3:
+                cairo_library_dir = os.path.join(PYCAIRO_DIR, "lib")
+                add_to_keywords(kw, "library_dirs", cairo_library_dir)
             checkdirs(cairo_include_dir)
         elif "pycairo" in pkgs_options:
             kw = pycairo_pkgconfig(*pkgs_options, **ekw)
diff --git a/src/xpra/client/gtk3/cairo_backing.py b/src/xpra/client/gtk3/cairo_backing.py
index dad7bef211..6721f086fe 100644
--- a/src/xpra/client/gtk3/cairo_backing.py
+++ b/src/xpra/client/gtk3/cairo_backing.py
@@ -77,7 +77,7 @@ def ui_paint_image():
 
     def _do_paint_rgb(self, cairo_format, has_alpha, img_data, x, y, width, height, rowstride, options):
         """ must be called from UI thread """
-        log("cairo._do_paint_rgb(%s, %s, %s bytes,%s,%s,%s,%s,%s,%s)", FORMATS.get(cairo_format, cairo_format), has_alpha, len(img_data), x, y, width, height, rowstride, options)
+        log("cairo._do_paint_rgb(%s, %s, %s %s,%s,%s,%s,%s,%s,%s) set_image_surface_data=%s", FORMATS.get(cairo_format, cairo_format), has_alpha, len(img_data), type(img_data), x, y, width, height, rowstride, options, set_image_surface_data)
         rgb_format = options.strget("rgb_format", "RGB")
         #this format we can handle with the workaround:
         if cairo_format==cairo.FORMAT_RGB24 and rgb_format=="RGB" and set_image_surface_data:
diff --git a/src/xpra/client/gtk_base/cairo_backing_base.py b/src/xpra/client/gtk_base/cairo_backing_base.py
index 098e8a024e..c9739ef0c5 100644
--- a/src/xpra/client/gtk_base/cairo_backing_base.py
+++ b/src/xpra/client/gtk_base/cairo_backing_base.py
@@ -13,7 +13,7 @@
 from xpra.gtk_common.gtk_util import cairo_set_source_pixbuf, gdk_cairo_context
 from xpra.client.gtk_base.gtk_window_backing_base import GTKWindowBacking
 from xpra.codecs.loader import get_codec
-from xpra.os_util import BytesIOClass
+from xpra.os_util import BytesIOClass, memoryview_to_bytes
 
 from xpra.log import Logger
 log = Logger("paint", "cairo")
@@ -114,7 +114,11 @@ def nasty_rgb_via_png_paint(self, cairo_format, has_alpha, img_data, x, y, width
             oformat = "RGBA"
         else:
             oformat = "RGB"
-        img = PIL.Image.frombuffer(oformat, (width,height), img_data, "raw", rgb_format, rowstride, 1)
+        #use frombytes rather than frombuffer to be compatible with python3 new-style buffers
+        #this is slower, but since this codepath is already dreadfully slow, we don't care
+        bdata = memoryview_to_bytes(img_data)
+        log("bdata=%s", type(bdata))
+        img = PIL.Image.frombytes(oformat, (width,height), bdata, "raw", rgb_format, rowstride, 1)
         #This is insane, the code below should work, but it doesn't:
         # img_data = bytearray(img.tostring('raw', oformat, 0, 1))
         # pixbuf = pixbuf_new_from_data(img_data, COLORSPACE_RGB, True, 8, width, height, rowstride)
diff --git a/src/xpra/os_util.py b/src/xpra/os_util.py
index e3d63469fe..3bf685f539 100644
--- a/src/xpra/os_util.py
+++ b/src/xpra/os_util.py
@@ -69,6 +69,8 @@ def bytestostr(x):
 
 if _memoryview:
     def memoryview_to_bytes(v):
+        if type(v)==bytes:
+            return v
         if isinstance(v, _memoryview):
             return v.tobytes()
         return str(v)