Gpu Hang with timestamp queries and compute dispatches on Intel HD 5500
Submitted by man..@..bus.fi
Assigned to Default DRI bug account
Link to original bug (#105934)
Description
Running OpenGL program with two glDispatch() calls, causes gpu hang on HD Graphics 5500.
Program basically does: if (1) { glUseProgram(computeprogram); glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, ssbo_test); glDispatchCompute(256/4, 256/4, 256/2); glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT); } if (1) { glUseProgram(computeprogram); glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, ssbo_test); glDispatchCompute(256/4, 256/4, 256/2); glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT); } .. and then simple one-triangle fullscreen pass to main framebuffer (0) using that SSBO.
When both of those are enabled, my computer nearly hangs and dmesg reports: [127049.481163] drm/i915: Resetting chip after gpu hang.
But if only one of those is enabled, everything is ok, compute dispatch takes 13ms and debug output renders on the screen.