diff -up mesa-18.0.5/src/glx/drisw_glx.c.dma mesa-18.0.5/src/glx/drisw_glx.c

--- mesa-18.0.5/src/glx/drisw_glx.c.dma	2018-12-07 10:42:42.332659700 +1000

+++ mesa-18.0.5/src/glx/drisw_glx.c	2018-12-07 10:43:08.312349783 +1000

@@ -812,6 +812,8 @@ static int

 check_xshm(Display *dpy)

 {

    int ignore;

+   /* disable shm paths for now */

+   return 0;

    return XQueryExtension(dpy, "MIT-SHM", &xshm_opcode, &ignore, &ignore);

 }