Created attachment 8896057 [details] Screenshot_20170811_021611.png User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170808130316 Steps to reproduce: Since I heard it should be working in nightly, this is supposedly a bug. It happens on every WebVR site (samples on webvr.info, aframe.io) when trying to enter VR mode. RX 480 with newest linux and mesa. GPU #1 Active Yes Description X.Org -- AMD Radeon (TM) RX 480 Graphics (POLARIS10 / DRM 3.18.0 / 4.13.0-rc2-gaee65f09d28b, LLVM 6.0.0) Vendor ID X.Org Device ID AMD Radeon (TM) RX 480 Graphics (POLARIS10 / DRM 3.18.0 / 4.13.0-rc2-gaee65f09d28b, LLVM 6.0.0) Driver Version 3.0 Mesa 17.3.0-devel (git-d78b74b8dd) Other steamvr vulkan and opengl applications work fine. Actual results: The SteamVR compositor doesn't receive any frames (shows the "loading" animation window), vrmonitor says firefox is unresponsive and firefox repeatedly spams this message to the console: [GFX1]: SharedSurfaceType::Basic not supported for WebVR As far as I remember this has always happened from the very first time I tried it shortly after the first SteamVR beta release in february.
I'll take this bug, as I'll also be fixing Bug 1310663 to bring up Linux support.