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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

To clarify: All hope is not lost for nouveau. Nouveau works and it works
fine with Mir in general. And mostly fine with Unity8 too. Nouveau is
only unusable with Xmir in the default DRI mode.

You can avoid that problem however using -sw mode, and you can avoid the resizing issues using -rootless but only after the new xmir with working rootless gets released. Once that happens you've mostly only got general Unity8 bugs to deal with and can then use:
    Xmir :0 -sw -rootless -flatten

So please wait for the new Xmir to be released and let us know how that
goes.

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https://bugs.launchpad.net/bugs/1499425

Title:
  [nouveau] xmir black window (mesa 11.0.0) and/or freezing and kernel
  errors

Status in Mir:
  Invalid
Status in mir package in Ubuntu:
  Invalid
Status in xorg-server package in Ubuntu:
  Confirmed

Bug description:
  wily/unity8/mir

  i'm trying to run some x11 apps on unity8/mir but i get a black
  window, the window size looks right, tested with geany, firefox, etc
  (windows size is diff depending on the app). tried every Xmir arg no
  luck

  i don't see any warnings or error messages

  glamor EGL version: 1.4 (DRI2)
  glamor EGL extensions: EGL_EXT_buffer_age EGL_EXT_image_dma_buf_import EGL_KHR_create_context EGL_KHR_get_all_proc_addresses EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_KHR_surfaceless_context EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_image_dma_buf_export EGL_WL_bind_wayland_display :
  glamor GL version: 3.0 Mesa 11.0.0
  glamor GL extensions: GL_ARB_multisample GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_copy_texture GL_EXT_polygon_offset GL_EXT_subtexture GL_EXT_texture_object GL_EXT_vertex_array GL_EXT_compiled_vertex_array GL_EXT_texture GL_EXT_texture3D GL_IBM_rasterpos_clip GL_ARB_point_parameters GL_EXT_draw_range_elements GL_EXT_packed_pixels GL_EXT_point_parameters GL_EXT_rescale_normal GL_EXT_separate_specular_color GL_EXT_texture_edge_clamp GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_ARB_framebuffer_sRGB GL_ARB_multitexture GL_EXT_framebuffer_sRGB GL_IBM_multimode_draw_arrays GL_IBM_texture_mirrored_repeat GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_transpose_matrix GL_EXT_blend_func_separate GL_EXT_fog_coord GL_EXT_multi_draw_arrays GL_EXT_secondary_color GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias GL_INGR_blend_func_separate GL_NV_blend_square GL_NV_light_max_e
  glamor GLSL version: 1.30
  [DRI2] Setup complete
  [DRI2]   DRI driver: nouveau
  [DRI2]   VDPAU driver: nouveau
  Resize requested to 1008x728

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