https://bugs.freedesktop.org/show_bug.cgi?id=105934
Bug ID: 105934 Summary: Gpu Hang after two compute dispatches on Intel HD 5500 Product: Mesa Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: medium Component: Drivers/DRI/i915 Assignee: dri-devel@lists.freedesktop.org Reporter: mankeli@kolumbus.fi QA Contact: dri-devel@lists.freedesktop.org
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.