[14.10] Compiz/Unity lacks opengl compatibility for NVidia GTX960

Background:
I had a working Ubuntu 14.10 system with an NVidia GTX 550 Ti adapter. Yesterday I replaced that adapter with an [ASUS Strix] NVidia GTX 960. I am using the X-org-edgers PPA for drivers, version 346, since there are no Ubuntu-Universe drivers with explicit support for my card.

Behavior:
When booting into Ubuntu normally, I should see the Launch panel and top-bar, but I do not. I do see my desktop icons and can interact with the system. Sound works. If I switch to terminal (ctrl+alt+f2) I can login, export display=:0, and launch a gnome-terminal from there, and then open firefox and others. There is no window-decoration, nor is their window compositing.

It appears that all Unity services (including screenshots, volume control, etc) are also not loading.

The dump I get from compiz in terminal after doing a dconf reset and "setsid unity" is:

aaron@naegleria:~$ dconf reset -f /org/compiz
aaron@naegleria:~$ setsid unity
[1] 3166
stop: Unknown job: unity-panel-service
compiz (core) - Info: Loading plugin: core
compiz (core) - Info: Starting plugin: core
start: Unknown job: unity-panel-service
compiz (core) - Info: Loading plugin: ccp
compiz (core) - Info: Starting plugin: ccp
compizconfig - Info: Backend : gsettings
compizconfig - Info: Integration : true
compizconfig - Info: Profile : unity
compiz (core) - Info: Loading plugin: composite
compiz (core) - Info: Starting plugin: composite
compiz (core) - Info: Loading plugin: move
compiz (core) - Info: Starting plugin: move
compiz (core) - Info: Loading plugin: place
compiz (core) - Info: Starting plugin: place
compiz (core) - Info: Loading plugin: compiztoolbox
compiz (core) - Info: Starting plugin: compiztoolbox
compiz (core) - Error: Plugin 'opengl' not loaded.

compiz (core) - Info: Loading plugin: resize
compiz (core) - Info: Starting plugin: resize
compiz (core) - Info: Loading plugin: snap
compiz (core) - Info: Starting plugin: snap
compiz (core) - Info: Loading plugin: mousepoll
compiz (core) - Info: Starting plugin: mousepoll
compiz (core) - Info: Loading plugin: imgpng
compiz (core) - Info: Starting plugin: imgpng
compiz (core) - Info: Loading plugin: session
compiz (core) - Info: Starting plugin: session
compiz (core) - Info: Loading plugin: vpswitch
compiz (core) - Info: Starting plugin: vpswitch
compiz (core) - Info: Loading plugin: regex
compiz (core) - Info: Starting plugin: regex
compiz (core) - Info: Loading plugin: workarounds
compiz (core) - Info: Starting plugin: workarounds
compiz (core) - Error: Plugin 'opengl' not loaded.

compiz (core) - Info: Stopping plugin: workarounds
compiz (core) - Info: Unloading plugin: workarounds
compiz (core) - Info: Stopping plugin: regex
compiz (core) - Info: Unloading plugin: regex
compiz (core) - Info: Stopping plugin: vpswitch
compiz (core) - Info: Unloading plugin: vpswitch
compiz (core) - Info: Stopping plugin: session
compiz (core) - Info: Unloading plugin: session
compiz (core) - Info: Stopping plugin: imgpng
compiz (core) - Info: Unloading plugin: imgpng
compiz (core) - Info: Stopping plugin: mousepoll
compiz (core) - Info: Unloading plugin: mousepoll
compiz (core) - Info: Stopping plugin: snap
compiz (core) - Info: Unloading plugin: snap
compiz (core) - Info: Stopping plugin: resize
compiz (core) - Info: Unloading plugin: resize
compiz (core) - Info: Stopping plugin: compiztoolbox
compiz (core) - Info: Unloading plugin: compiztoolbox
compiz (core) - Info: Stopping plugin: place
compiz (core) - Info: Unloading plugin: place
compiz (core) - Info: Stopping plugin: move
compiz (core) - Info: Unloading plugin: move
compiz (core) - Info: Stopping plugin: composite
compiz (core) - Info: Unloading plugin: composite
compiz (core) - Info: Stopping plugin: ccp
compiz (core) - Info: Unloading plugin: ccp
compiz (core) - Info: Stopping plugin: core
compiz (core) - Info: Unloading plugin: core

The only known nouveau package (since I know this can cause conflicts) is:

aaron@naegleria:~$ dpkg -l | grep nouveau
ii libdrm-nouveau2:amd64 2.4.56-1 amd64 Userspace interface to nouveau-specific kernel DRM services -- runtime
aaron@naegleria:~$

And for NVidia packages:
aaron@naegleria:~$ dpkg -l | grep nvidia
ii nvidia-346 346.35-0ubuntu1~xedgers14.10.1 amd64 NVIDIA binary driver - version 346.35
ii nvidia-346-uvm 346.35-0ubuntu1~xedgers14.10.1 amd64 NVIDIA Unified Memory kernel module
ii nvidia-opencl-icd-346 346.35-0ubuntu1~xedgers14.10.1 amd64 NVIDIA OpenCL ICD
ii nvidia-prime 0.6.7 amd64 Tools to enable NVIDIA's Prime
ii nvidia-settings 346.35-0ubuntu1~xedgers14.10.1 amd64 Tool for configuring the NVIDIA graphics driver
aaron@naegleria:~$

lspci doesn't correctly identify the card, as it has in the past, though:
aaron@naegleria:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1401 (rev a1)
aaron@naegleria:~$

]]]]]]]]]]]] Attempted Fixes:
Per searches on Stack Overflow and elsewhere, I have tried:

* Install CCSM, enable "unity" (and its dependencies)
(Possibly relevant: "Unredirect Driver Blacklist" has: (nouveau|Intel).*Mesa 8.0

* Adding nouveau to a blacklist file (this is not presently enabled)

* The dconf reset / setsid hack (see above)

* Purging all nvidia-* drivers prior to installing any new ones.

* Installing drivers directly from NVidia (the ".run" file for drivers nvidia-346). I have done this by booting, switching to terminal, shutting down lightdm service, then running the NVidia driver. It installs correctly (though it does complain about the pre-install script not working; the rest of the process works). I am able to load NVidia-Settings and see graphics-card-related details.

* Reinstalling lightdm, unity, ubuntu-desktop

* [Present attempt] Installing the Xorg-edgers drivers for NVidia-346. This also loads the relevant Xorg packages, nvidia-settings, etc. NVidia-settings loads the drivers as it did with NVidia-binaries, above. Details below.

* Reinstalling ubuntu 14.10 from USB stick (leaving /home/ intact)

I am current with all system updates.

Here is NVidia-Settings dump:
Operating System: Linux-x86_64
NVidia Driver Versoin: 346.35

X Server Information: >>>>>>>>>>>>>>>>>>>>>>>
Display Name: naegleria:0
Server Version Number: 11.0
Server Vendor String: The X.Org Foundation
Server Vendor Version: 1.16.0 (11600000)
NV-CONTROL Version: 1.29
Screens: 1 [NOTE: I have two displays, but they are both functional and spanned correctly]

OpenGL Settings : >>>>>>>>>>>>>>>>>>>>>>>
[X] Sync to VBlank
[X] Allow Flipping
Quality [roughly 1/3 in]
Miscellaneaous:
[X] Use Conformant Texture Clamping

OpenGL/GLX Information: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
GL_AMD_multi_draw_indirect
GL_AMD_seamless_cubemap_per_texture
GL_AMD_vertex_shader_viewport_index
GL_AMD_vertex_shader_layer
GL_ARB_arrays_of_arrays
GL_ARB_base_instance
GL_ARB_bindless_texture
GL_ARB_blend_func_extended
GL_ARB_buffer_storage
GL_ARB_clear_buffer_object
GL_ARB_clear_texture
GL_ARB_clip_control
GL_ARB_color_buffer_float
GL_ARB_compatibility
GL_ARB_compressed_texture_pixel_storage
GL_ARB_conservative_depth
GL_ARB_compute_shader
GL_ARB_compute_variable_group_size
GL_ARB_conditional_render_inverted
GL_ARB_copy_buffer
GL_ARB_copy_image
GL_ARB_cull_distance
GL_ARB_debug_output
GL_ARB_depth_buffer_float
GL_ARB_depth_clamp
GL_ARB_depth_texture
GL_ARB_derivative_control
GL_ARB_direct_state_access
GL_ARB_draw_buffers
GL_ARB_draw_buffers_blend
GL_ARB_draw_indirect
GL_ARB_draw_elements_base_vertex
GL_ARB_draw_instanced
GL_ARB_enhanced_layouts
GL_ARB_ES2_compatibility
GL_ARB_ES3_compatibility
GL_ARB_ES3_1_compatibility
GL_ARB_explicit_attrib_location
GL_ARB_explicit_uniform_location
GL_ARB_fragment_coord_conventions
GL_ARB_fragment_layer_viewport
GL_ARB_fragment_program
GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader
GL_ARB_framebuffer_no_attachments
GL_ARB_framebuffer_object
GL_ARB_framebuffer_sRGB
GL_ARB_geometry_shader4
GL_ARB_get_program_binary
GL_ARB_get_texture_sub_image
GL_ARB_gpu_shader5
GL_ARB_gpu_shader_fp64
GL_ARB_half_float_pixel
GL_ARB_half_float_vertex
GL_ARB_imaging
GL_ARB_indirect_parameters
GL_ARB_instanced_arrays
GL_ARB_internalformat_query
GL_ARB_internalformat_query2
GL_NV_internalformat_sample_query
GL_ARB_invalidate_subdata
GL_ARB_map_buffer_alignment
GL_ARB_map_buffer_range
GL_ARB_multi_bind
GL_ARB_multi_draw_indirect
GL_ARB_multisample
GL_ARB_multitexture
GL_ARB_occlusion_query
GL_ARB_occlusion_query2
GL_ARB_pipeline_statistics_query
GL_ARB_pixel_buffer_object
GL_ARB_point_parameters
GL_ARB_point_sprite
GL_ARB_program_interface_query
GL_ARB_provoking_vertex
GL_ARB_robust_buffer_access_behavior
GL_ARB_robustness
GL_ARB_sample_shading
GL_ARB_sampler_objects
GL_ARB_seamless_cube_map
GL_ARB_seamless_cubemap_per_texture
GL_ARB_separate_shader_objects
GL_ARB_shader_atomic_counters
GL_ARB_shader_bit_encoding
GL_ARB_shader_draw_parameters
GL_ARB_shader_group_vote
GL_ARB_shader_image_load_store
GL_ARB_shader_image_size
GL_ARB_shader_objects
GL_ARB_shader_precision
GL_ARB_query_buffer_object
GL_ARB_shader_storage_buffer_object
GL_ARB_shader_subroutine
GL_ARB_shader_texture_image_samples
GL_ARB_shader_texture_lod
GL_ARB_shading_language_100
GL_ARB_shading_language_420pack
GL_ARB_shading_language_include
GL_ARB_shading_language_packing
GL_ARB_shadow
GL_ARB_sparse_buffer
GL_ARB_sparse_texture
GL_ARB_stencil_texturing
GL_ARB_sync
GL_ARB_tessellation_shader
GL_ARB_texture_barrier
GL_ARB_texture_border_clamp
GL_ARB_texture_buffer_object
GL_ARB_texture_buffer_object_rgb32
GL_ARB_texture_buffer_range
GL_ARB_texture_compression
GL_ARB_texture_compression_bptc
GL_ARB_texture_compression_rgtc
GL_ARB_texture_cube_map
GL_ARB_texture_cube_map_array
GL_ARB_texture_env_add
GL_ARB_texture_env_combine
GL_ARB_texture_env_crossbar
GL_ARB_texture_env_dot3
GL_ARB_texture_float
GL_ARB_texture_gather
GL_ARB_texture_mirror_clamp_to_edge
GL_ARB_texture_mirrored_repeat
GL_ARB_texture_multisample
GL_ARB_texture_non_power_of_two
GL_ARB_texture_query_levels
GL_ARB_texture_query_lod
GL_ARB_texture_rectangle
GL_ARB_texture_rg
GL_ARB_texture_rgb10_a2ui
GL_ARB_texture_stencil8
GL_ARB_texture_storage
GL_ARB_texture_storage_multisample
GL_ARB_texture_swizzle
GL_ARB_texture_view
GL_ARB_timer_query
GL_ARB_transform_feedback2
GL_ARB_transform_feedback3
GL_ARB_transform_feedback_instanced
GL_ARB_transform_feedback_overflow_query
GL_ARB_transpose_matrix
GL_ARB_uniform_buffer_object
GL_ARB_vertex_array_bgra
GL_ARB_vertex_array_object
GL_ARB_vertex_attrib_64bit
GL_ARB_vertex_attrib_binding
GL_ARB_vertex_buffer_object
GL_ARB_vertex_program
GL_ARB_vertex_shader
GL_ARB_vertex_type_10f_11f_11f_rev
GL_ARB_vertex_type_2_10_10_10_rev
GL_ARB_viewport_array
GL_ARB_window_pos
GL_ATI_draw_buffers
GL_ATI_texture_float
GL_ATI_texture_mirror_once
GL_S3_s3tc
GL_EXT_texture_env_add
GL_EXT_abgr
GL_EXT_bgra
GL_EXT_bindable_uniform
GL_EXT_blend_color
GL_EXT_blend_equation_separate
GL_EXT_blend_func_separate
GL_EXT_blend_minmax
GL_EXT_blend_subtract
GL_EXT_compiled_vertex_array
GL_EXT_Cg_shader
GL_EXT_depth_bounds_test
GL_EXT_direct_state_access
GL_EXT_draw_buffers2
GL_EXT_draw_instanced
GL_EXT_draw_range_elements
GL_EXT_fog_coord
GL_EXT_framebuffer_blit
GL_EXT_framebuffer_multisample
GL_EXTX_framebuffer_mixed_formats
GL_EXT_framebuffer_multisample_blit_scaled
GL_EXT_framebuffer_object
GL_EXT_framebuffer_sRGB
GL_EXT_geometry_shader4
GL_EXT_gpu_program_parameters
GL_EXT_gpu_shader4
GL_EXT_multi_draw_arrays
GL_EXT_packed_depth_stencil
GL_EXT_packed_float
GL_EXT_packed_pixels
GL_EXT_pixel_buffer_object
GL_EXT_point_parameters
GL_EXT_polygon_offset_clamp
GL_EXT_post_depth_coverage
GL_EXT_provoking_vertex
GL_EXT_raster_multisample
GL_EXT_rescale_normal
GL_EXT_secondary_color
GL_EXT_separate_shader_objects
GL_EXT_separate_specular_color
GL_EXT_shader_image_load_formatted
GL_EXT_shader_image_load_store
GL_EXT_shader_integer_mix
GL_EXT_shadow_funcs
GL_EXT_sparse_texture2
GL_EXT_stencil_two_side
GL_EXT_stencil_wrap
GL_EXT_texture3D
GL_EXT_texture_array
GL_EXT_texture_buffer_object
GL_EXT_texture_compression_dxt1
GL_EXT_texture_compression_latc
GL_EXT_texture_compression_rgtc
GL_EXT_texture_compression_s3tc
GL_EXT_texture_cube_map
GL_EXT_texture_edge_clamp
GL_EXT_texture_env_combine
GL_EXT_texture_env_dot3
GL_EXT_texture_filter_anisotropic
GL_EXT_texture_filter_minmax
GL_EXT_texture_integer
GL_EXT_texture_lod
GL_EXT_texture_lod_bias
GL_EXT_texture_mirror_clamp
GL_EXT_texture_object
GL_EXT_texture_shared_exponent
GL_EXT_texture_sRGB
GL_EXT_texture_sRGB_decode
GL_EXT_texture_storage
GL_EXT_texture_swizzle
GL_EXT_timer_query
GL_EXT_transform_feedback2
GL_EXT_vertex_array
GL_EXT_vertex_array_bgra
GL_EXT_vertex_attrib_64bit
GL_EXT_x11_sync_object
GL_EXT_import_sync_object
GL_IBM_rasterpos_clip
GL_IBM_texture_mirrored_repeat
GL_KHR_context_flush_control
GL_KHR_debug
GL_KHR_robust_buffer_access_behavior
GL_KHR_robustness
GL_KTX_buffer_region
GL_NV_bindless_multi_draw_indirect
GL_NV_bindless_multi_draw_indirect_count
GL_NV_bindless_texture
GL_NV_blend_equation_advanced
GL_NV_blend_equation_advanced_coherent
GL_NV_blend_square
GL_NV_compute_program5
GL_NV_conditional_render
GL_NV_conservative_raster
GL_NV_copy_depth_to_color
GL_NV_copy_image
GL_NV_depth_buffer_float
GL_NV_depth_clamp
GL_NV_draw_texture
GL_NV_ES1_1_compatibility
GL_NV_ES3_1_compatibility
GL_NV_explicit_multisample
GL_NV_fence
GL_NV_fill_rectangle
GL_NV_float_buffer
GL_NV_fog_distance
GL_NV_fragment_coverage_to_color
GL_NV_fragment_program
GL_NV_fragment_program_option
GL_NV_fragment_program2
GL_NV_fragment_shader_interlock
GL_NV_framebuffer_mixed_samples
GL_NV_framebuffer_multisample_coverage
GL_NV_geometry_shader4
GL_NV_geometry_shader_passthrough
GL_NV_gpu_program4
GL_NV_gpu_program4_1
GL_NV_gpu_program5
GL_NV_gpu_program5_mem_extended
GL_NV_gpu_program_fp64
GL_NV_gpu_shader5
GL_NV_half_float
GL_NV_light_max_exponent
GL_NV_multisample_coverage
GL_NV_multisample_filter_hint
GL_NV_occlusion_query
GL_NV_packed_depth_stencil
GL_NV_parameter_buffer_object
GL_NV_parameter_buffer_object2
GL_NV_path_rendering
GL_NV_path_rendering_shared_edge
GL_NV_pixel_data_range
GL_NV_point_sprite
GL_NV_primitive_restart
GL_NV_register_combiners
GL_NV_register_combiners2
GL_NV_sample_locations
GL_NV_sample_mask_override_coverage
GL_NV_shader_atomic_counters
GL_NV_shader_atomic_float
GL_NV_shader_atomic_fp16_vector
GL_NV_shader_atomic_int64
GL_NV_shader_buffer_load
GL_NV_shader_storage_buffer_object
GL_NV_texgen_reflection
GL_NV_texture_barrier
GL_NV_texture_compression_vtc
GL_NV_texture_env_combine4
GL_NV_texture_multisample
GL_NV_texture_rectangle
GL_NV_texture_shader
GL_NV_texture_shader2
GL_NV_texture_shader3
GL_NV_transform_feedback
GL_NV_transform_feedback2
GL_NV_uniform_buffer_unified_memory
GL_NV_vdpau_interop
GL_NV_vertex_array_range
GL_NV_vertex_array_range2
GL_NV_vertex_attrib_integer_64bit
GL_NV_vertex_buffer_unified_memory
GL_NV_vertex_program
GL_NV_vertex_program1_1
GL_NV_vertex_program2
GL_NV_vertex_program2_option
GL_NV_vertex_program3
GL_NV_viewport_array2
GL_NVX_conditional_render
GL_NVX_gpu_memory_info
GL_NVX_nvenc_interop
GL_NV_shader_thread_group
GL_NV_shader_thread_shuffle
GL_KHR_blend_equation_advanced
GL_KHR_blend_equation_advanced_coherent
GL_SGIS_generate_mipmap
GL_SGIS_texture_lod
GL_SGIX_depth_texture
GL_SGIX_shadow
GL_SUN_slice_accum

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> And then my Nvidia-Settings.rc file:
aaron@naegleria:~$ cat ~/.nvidia-settings-rc
#
# /home/aaron/.nvidia-settings-rc
#
# Configuration file for nvidia-settings - the NVIDIA X Server Settings utility
# Generated on Thu Feb 5 20:12:08 2015
#

# ConfigProperties:

RcFileLocale = C
ToolTips = Yes
DisplayStatusBar = Yes
SliderTextEntries = Yes
IncludeDisplayNameInConfigFile = No
ShowQuitDialog = Yes
UpdateRulesOnProfileNameChange = Yes
Timer = Memory_Used_(GPU_0),Yes,3000
Timer = PowerMizer_Monitor_(GPU_0),Yes,1000
Timer = Thermal_Monitor_(GPU_0),Yes,1000
Timer = Graphics_Card_(GPU_0),Yes,1000

# Attributes:

0/SyncToVBlank=1
0/LogAniso=0
0/FSAA=0
0/TextureSharpen=0
0/TextureClamping=1
0/FXAA=0
0/AllowFlipping=1
0/FSAAAppControlled=1
0/LogAnisoAppControlled=1
0/OpenGLImageSettings=1
0/FSAAAppEnhanced=0
0/XVideoSyncToDisplayID=DVI-I-0
[DPY:DVI-I-0]/Dithering=0
[DPY:DVI-I-0]/DitheringMode=0
[DPY:DVI-I-0]/DitheringDepth=0
[DPY:DVI-I-0]/SynchronousPaletteUpdates=0
[DPY:DVI-I-1]/RedBrightness=0.000000
[DPY:DVI-I-1]/GreenBrightness=0.000000
[DPY:DVI-I-1]/BlueBrightness=0.000000
[DPY:DVI-I-1]/RedContrast=0.000000
[DPY:DVI-I-1]/GreenContrast=0.000000
[DPY:DVI-I-1]/BlueContrast=0.000000
[DPY:DVI-I-1]/RedGamma=1.000000
[DPY:DVI-I-1]/GreenGamma=1.000000
[DPY:DVI-I-1]/BlueGamma=1.000000
[DPY:DVI-I-1]/Dithering=0
[DPY:DVI-I-1]/DitheringMode=0
[DPY:DVI-I-1]/DitheringDepth=0
[DPY:DVI-I-1]/DigitalVibrance=0
[DPY:DVI-I-1]/ColorSpace=0
[DPY:DVI-I-1]/ColorRange=0
[DPY:DVI-I-1]/SynchronousPaletteUpdates=0
[DPY:DP-0]/Dithering=0
[DPY:DP-0]/DitheringMode=0
[DPY:DP-0]/DitheringDepth=0
[DPY:DP-0]/SynchronousPaletteUpdates=0
[DPY:DP-1]/Dithering=0
[DPY:DP-1]/DitheringMode=0
[DPY:DP-1]/DitheringDepth=0
[DPY:DP-1]/SynchronousPaletteUpdates=0
[DPY:DP-2]/Dithering=0
[DPY:DP-2]/DitheringMode=0
[DPY:DP-2]/DitheringDepth=0
[DPY:DP-2]/SynchronousPaletteUpdates=0
[DPY:DP-3]/Dithering=0
[DPY:DP-3]/DitheringMode=0
[DPY:DP-3]/DitheringDepth=0
[DPY:DP-3]/SynchronousPaletteUpdates=0
[DPY:HDMI-0]/Dithering=0
[DPY:HDMI-0]/DitheringMode=0
[DPY:HDMI-0]/DitheringDepth=0
[DPY:HDMI-0]/SynchronousPaletteUpdates=0
[DPY:DP-4]/Dithering=0
[DPY:DP-4]/DitheringMode=0
[DPY:DP-4]/DitheringDepth=0
[DPY:DP-4]/SynchronousPaletteUpdates=0
[DPY:DP-5]/RedBrightness=0.000000
[DPY:DP-5]/GreenBrightness=0.000000
[DPY:DP-5]/BlueBrightness=0.000000
[DPY:DP-5]/RedContrast=0.000000
[DPY:DP-5]/GreenContrast=0.000000
[DPY:DP-5]/BlueContrast=0.000000
[DPY:DP-5]/RedGamma=1.000000
[DPY:DP-5]/GreenGamma=1.000000
[DPY:DP-5]/BlueGamma=1.000000
[DPY:DP-5]/Dithering=0
[DPY:DP-5]/DitheringMode=0
[DPY:DP-5]/DitheringDepth=0
[DPY:DP-5]/DigitalVibrance=0
[DPY:DP-5]/ColorSpace=0
[DPY:DP-5]/ColorRange=0
[DPY:DP-5]/SynchronousPaletteUpdates=0
[DPY:Unknown-0]/Dithering=0
[DPY:Unknown-0]/DitheringMode=0
[DPY:Unknown-0]/DitheringDepth=0
[DPY:Unknown-0]/SynchronousPaletteUpdates=0
aaron@naegleria:~$