commit 29733d7087de218428322ec0fe073af70db76f58
Author: Francois Gouget <fgouget@codeweavers.com>
Date:   Sat Jul 18 16:14:27 2015 +0200

    va/x11: Don't crash the application if it does not have access to the DRI2 device.
    
    Applications run in a different account than the logged in user will not have permission to access /dev/dri/card0 but may be able to work without it, particularly if VA-API was brought in through a general framework such as GStreamer.
    
    Signed-off-by: Francois Gouget <fgouget@free.fr>

diff --git a/va/x11/dri2_util.c b/va/x11/dri2_util.c
index 9f0dc76..d076fb3 100644
--- a/va/x11/dri2_util.c
+++ b/va/x11/dri2_util.c
@@ -196,7 +196,6 @@ isDRI2Connected(VADriverContextP ctx, char **driver_name)
         goto err_out;
 
     dri_state->base.fd = open(device_name, O_RDWR);
-    assert(dri_state->base.fd >= 0);
 
     if (dri_state->base.fd < 0)
         goto err_out;