I use ubuntu 18.04 （qt 5.9.5+dfsg-0ubuntu1） on firefly 3399 （mali T860，driver libmali-midgard-t86x-r13p0.so）

The WebEingine example: simplebrowser can't use WebGL. but chromium is OK

The webgl demo error：

Status: Could not create a WebGL context, VENDOR = 0xffff, DEVICE = 0xffff, GL_VENDOR = ARM, GL_RENDERER = Mali-T860, GL_VERSION = 3.2, Sandboxed = no, Optimus = no, AMD switchable = no, Reset notification strategy = 0x8261, GPU process crash count = 0, ErrorMessage = bindToCurrentThread failed: .

The chrome://gpu

Graphics Feature Status
Canvas: Hardware accelerated
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Enabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Video Decode: Software only. Hardware acceleration disabled
Video Encode: Hardware accelerated
VPx Video Decode: Software only. Hardware acceleration disabled
WebGL: Hardware accelerated
WebGL2: Hardware accelerated

bindToCurrentThread error while creating WebGL context ？Why chromium is OK

I used the same version of the Qt（5.9.5+dfsg-0ubuntu1） on odroid C2（mali 450） test results normal，webgl is OK

I think all the EGL/GLES drivers have been called correctly，why get WebGL context error？

How can I use WebGL on rk3399 ，Please help me！