Hello, Being in the middle of bring-up of the new board with Vivante GPU (HSDK namely, see?https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arc/plat-hsdk) I was looking at simple 3D test apps to see how Etnaviv works on the hardware. So far I was able to get kmscube working perfectly fine and the next item I took was glxgears (for some reason I was under impression that's de facto "Hello world" app in the GPU world). But apparently even with Xserver up and running glxgears doesn't work. Moreover I tried the same thing on Wandboard Quad but to no avail as well. That's what I saw: ------------------------->8--------------------- # glxgears Error: couldn't get an RGB, Double-buffered visual # glxinfo name of display: :0 Error: couldn't find RGB GLX visual or fbconfig? ------------------------->8--------------------- Googling didn't help here unfortunately so maybe some pointers could be suggested here... like what do I do wrong and if glxgears is supposed to work on top of DRM GPU at all? Thanks a lot in advance! -Alexey