Default nvidia to swiftshader

Try to choose a supported gpu on PRIME devices

tools/helpers/__init__.py

@@ -9,3 +9,4 @@
 import tools.helpers.mount
 import tools.helpers.http
 import tools.helpers.ipc
+import tools.helpers.gpu

tools/helpers/gpu.py

@@ -0,0 +1,13 @@
+import glob
+import os
+import tools.helpers.props
+
+unsupported = ["nvidia"]
+
+def getDriNode(args):
+    for node in glob.glob("/dev/dri/renderD*"):
+        dev = os.path.basename(node)
+        driver = tools.helpers.props.file_get(args, "/sys/class/drm/{}/device/uevent".format(dev), "DRIVER")
+        if driver not in unsupported:
+            return node
+    return ""

tools/helpers/lxc.py

@@ -51,7 +51,7 @@ def make_entry(src, dist=None, mnt_type="none", options="bind,create=file,option
     make_entry("/dev/pvr_sync")
     make_entry("/dev/pmsg0")
     make_entry("/dev/dxg")
-    make_entry("/dev/dri", options="bind,create=dir,optional 0 0")
+    make_entry(tools.helpers.gpu.getDriNode(args), "dev/dri/renderD128")
 
     for n in glob.glob("/dev/fb*"):
         make_entry(n)
@@ -180,7 +180,7 @@ def find_hal(hardware):
 
     gralloc = find_hal("gralloc")
     if gralloc == "":
-        if os.path.exists("/dev/dri"):
+        if tools.helpers.gpu.getDriNode(args):
             gralloc = "gbm"
             egl = "mesa"
         else: