I'm marking the nouveau/Mesa crash as high severity. And the secondary Mir crash is only medium because that's not really the problem at all.
Here's the Mesa crash: #9 <signal handler called> No locals. #10 0x00007fe1e4c4f06c in pushbuf_kref () from /tmp/apport_sandbox_hSYpvb/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 No symbol table info available. #11 0x00007fe1e4c4f709 in pushbuf_validate () from /tmp/apport_sandbox_hSYpvb/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 No symbol table info available. #12 0x00007fe1e2fb25ef in nv50_state_validate (nv50=nv50@entry=0x5608093d9c40, mask=mask@entry=4096, validate_list=validate_list@entry=0x7fe1e35ef660 <validate_list_3d>, size=size@entry=25, dirty=dirty@entry=0x5608093da018, bufctx=0x5608093dd6f0) at ../../../../../src/gallium/drivers/nouveau/nv50/nv50_state_validate.c:554 state_mask = <optimized out> ret = <optimized out> i = <optimized out> #13 0x00007fe1e2fb2797 in nv50_state_validate_3d (nv50=nv50@entry=0x5608093d9c40, mask=mask@entry=4096) at ../../../../../src/gallium/drivers/nouveau/nv50/nv50_state_validate.c:564 ret = <optimized out> #14 0x00007fe1e2fb4e01 in nv50_clear (pipe=0x5608093d9c40, buffers=4, color=0x7fe1ebbf5acc, depth=1, stencil=0) at ../../../../../src/gallium/drivers/nouveau/nv50/nv50_surface.c:528 push = 0x56080930e500 fb = 0x5608093dae28 i = <optimized out> j = <optimized out> k = <optimized out> mode = 0 #15 0x00007fe1e2c7ea32 in st_Clear (ctx=0x7fe1ebbf4010, mask=2) at ../../../src/mesa/state_tracker/st_cb_clear.c:463 depthRb = <optimized out> stencilRb = <optimized out> quad_buffers = <optimized out> clear_buffers = 4 i = <optimized out> #16 0x00007fe1eb9249f1 in mir::renderer::gl::Renderer::render(std::vector<std::shared_ptr<mir::graphics::Renderable>, std::allocator<std::shared_ptr<mir::graphics::Renderable> > > const&) const (this=0x7fe1d00008c0, renderables=...) at ./src/renderers/gl/renderer.cpp:246 ** Also affects: mesa (Ubuntu) Importance: Undecided Status: New ** Changed in: mesa (Ubuntu) Importance: Undecided => High ** Summary changed: - unity-system-compositor crashed with SIGABRT in mir::fatal_error_abort() + unity-system-compositor crashed with SIGABRT in mir::fatal_error_abort() [nouveau crashed during glClear()] ** Tags added: nouveau ** Summary changed: - unity-system-compositor crashed with SIGABRT in mir::fatal_error_abort() [nouveau crashed during glClear()] + unity-system-compositor crashed with "Failed to schedule page flip", but only after nouveau crashed in glClear(). ** Also affects: libdrm (Ubuntu) Importance: Undecided Status: New ** Changed in: libdrm (Ubuntu) Importance: Undecided => High ** Tags added: unity8-desktop ** Also affects: canonical-devices-system-image Importance: Undecided Status: New ** Changed in: mir Status: New => Triaged ** Changed in: mir (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623507 Title: unity-system-compositor crashed with "Failed to schedule page flip", but only after nouveau crashed in glClear(). To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1623507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs