Histogram fill transparency not working (EPEL7 package)

What “OpenGL errors” are you talikng about?
If you just get something like this, then it is still fine:

libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: r600

These are the errors you’ll get in the container when starting ROOT:

libGL error: MESA-LOADER: failed to retrieve device information
libGL error: unable to load driver: i915_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: i915
libGL error: failed to open drm device: No such file or directory
libGL error: failed to load driver: i965
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast

And I’ve always had them within my CentOS containers, I remember struggling a lot in the past to get rid of them but never succeeded (all the OpenGL stuff is correctly installed as a dependency of the EPEL7 ROOT rpm)… Also, as I said, I don’t get any of those errors in my CentOS7 physical machine.

Moreover, despite of the errors, I’ve never encountered any kind of issue by running ROOT graphics from containers (maybe until now…?)

Maybe, instead of the “docker”, you could try the “Singularity” (which is claimed to work flawlessly with X11).

In any case, of course, your “X display server” needs to have OpenGL support built in (and the “container” with ROOT, too, of course).

Sure, I use Singularity too, but unfortunately the situation is the same, e.g. with the following recipe file:

Bootstrap: docker
From: centos:7

%post
    yum -y -q install epel-release
    yum -y -q install root

I get the same errors. The fact that I don’t have them on my pc, where X11 and ROOT are installed in the same way, still puzzles me.

However, you could be right, maybe the Xorg distribution for CentOS7 does not have OpenGL support, I have to check…

On your “container”, before you start ROOT or another OpenGL (GLX) application (e.g. “glxinfo” and/or “glxgears”), try:
[bash]$ export LIBGL_ALWAYS_INDIRECT=1
[tcsh]$ setenv LIBGL_ALWAYS_INDIRECT 1

See also:
CMSPublic -> OpenGL and X11 problems

Oh, nice, no more libGL errors… Thanks!

However, as suspected, this has nothing to do with the transparency issue… have to check the OpenGL support thing

Maybe, instead of executing “yum -y -q install root”, you could try to download and unpack the ROOT 6.12/06 binary distribution provided by the ROOT Team.

BTW. Have you checked that you have the “root-graf3d-gl” package installed? Maybe it is an optional package which you need to manually add using yum.

I’ll try!

I didn’t have it, but after installing it the issue was still there…

Update: the problem remains also with the official binary distribution, so it shouldn’t be a ROOT issue

Try maybe:

I already tried to add e.g.

Section "ServerFlags"
    Option "AllowIndirectGLX" "on"
    Option "IndirectGLX" "on"
EndSection

to /etc/X11/xorg.conf!

I think you need to “enable_iglx” on your mac (using the “magic” command shown in the link).

But I am working on a CentOS7 machine since the beginning…

So your “local machine” (i.e. where your monitor / screen is connected) is a CentOS7 and on this machine you run a docker / singularity container which also has CentOS7?

I tried with Docker/Singularity containers just to show you that I didn’t do nothing strange and give you a reproducible environment for the issue, the original transparency problem shows up on my local CentOS7 machine without any container/ssh connections in between.

On your “local machine”, try to run “glxdemo”, “glxheads”, “glxgears” and post here the output of “glxinfo”.

glxgears, the test binary included in glx-utils-8.2.0-3.el7.x86_64, runs without errors or warnings, this is the output of glxinfo (just the first part):

name of display: :1
display: :1  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, 
    GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_import_context, GLX_EXT_libglvnd, GLX_EXT_texture_from_pixmap, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, 
    GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample, 
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, 
    GLX_SGI_make_current_read, GLX_SGI_swap_control
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_EXT_buffer_age, GLX_EXT_create_context_es2_profile, 
    GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_EXT_buffer_age, GLX_EXT_create_context_es2_profile, 
    GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 630 (Kaby Lake GT2) 
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.2.3
OpenGL core profile shading language version string: 4.50
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth, 
    GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture, 
    GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax, 
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index, 
    GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, 
    GL_APPLE_object_purgeable, GL_ARB_ES2_compatibility, 
    GL_ARB_ES3_1_compatibility, GL_ARB_ES3_2_compatibility, 
    GL_ARB_ES3_compatibility, GL_ARB_arrays_of_arrays, GL_ARB_base_instance, 
    GL_ARB_blend_func_extended, GL_ARB_buffer_storage, 
    GL_ARB_clear_buffer_object, GL_ARB_clear_texture, GL_ARB_clip_control, 
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader, 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    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_derivative_control, GL_ARB_direct_state_access, 
    GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend, 
    GL_ARB_draw_elements_base_vertex, GL_ARB_draw_indirect, 
    GL_ARB_draw_instanced, GL_ARB_enhanced_layouts, 
    GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location, 
    GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport, 
    GL_ARB_fragment_shader, GL_ARB_framebuffer_no_attachments, 
    GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB, 
    GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image, 
    GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64, 
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_internalformat_query2, 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_occlusion_query2, 
    GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object, 
    GL_ARB_point_sprite, GL_ARB_post_depth_coverage, 
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex, 
    GL_ARB_query_buffer_object, 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_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    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_shader_stencil_export, GL_ARB_shader_storage_buffer_object, 
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_image_samples, 
    GL_ARB_shader_texture_lod, GL_ARB_shader_viewport_layer_array, 
    GL_ARB_shading_language_420pack, GL_ARB_shading_language_packing, 
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader, 
    GL_ARB_texture_barrier, GL_ARB_texture_buffer_object, 
    GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_buffer_range, 
    GL_ARB_texture_compression_bptc, GL_ARB_texture_compression_rgtc, 
    GL_ARB_texture_cube_map_array, GL_ARB_texture_float, 
    GL_ARB_texture_gather, GL_ARB_texture_mirror_clamp_to_edge, 
    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_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_shader, GL_ARB_vertex_type_10f_11f_11f_rev, 
    GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array, 
    GL_ATI_blend_equation_separate, GL_ATI_texture_float, GL_EXT_abgr, 
    GL_EXT_blend_equation_separate, GL_EXT_draw_buffers2, 
    GL_EXT_draw_instanced, GL_EXT_framebuffer_blit, 
    GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_multisample_blit_scaled, 
    GL_EXT_framebuffer_sRGB, GL_EXT_packed_depth_stencil, GL_EXT_packed_float, 
    GL_EXT_pixel_buffer_object, GL_EXT_polygon_offset_clamp, 
    GL_EXT_provoking_vertex, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_samples_identical, GL_EXT_texture_array, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic, 
    GL_EXT_texture_integer, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode, 
    GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, 
    GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback, 
    GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays, 
    GL_INTEL_conservative_rasterization, GL_INTEL_performance_query, 
    GL_KHR_blend_equation_advanced, GL_KHR_blend_equation_advanced_coherent, 
    GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error, 
    GL_KHR_robust_buffer_access_behavior, GL_KHR_robustness, 
    GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert, 
    GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba, 
    GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_packed_depth_stencil, 
    GL_NV_texture_barrier, GL_OES_EGL_image, GL_S3_s3tc

OpenGL version string: 3.0 Mesa 17.2.3
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth, 
    GL_AMD_draw_buffers_blend, GL_AMD_seamless_cubemap_per_texture, 
    GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax, 
    GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, 
    GL_APPLE_object_purgeable, GL_APPLE_packed_pixels, 
    GL_ARB_ES2_compatibility, GL_ARB_ES3_compatibility, 
    GL_ARB_arrays_of_arrays, 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_compressed_texture_pixel_storage, GL_ARB_compute_shader, 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    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_draw_buffers, 
    GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex, 
    GL_ARB_draw_instanced, GL_ARB_explicit_attrib_location, 
    GL_ARB_explicit_uniform_location, GL_ARB_fragment_coord_conventions, 
    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_get_program_binary, GL_ARB_get_texture_sub_image, 
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_internalformat_query2, GL_ARB_invalidate_subdata, 
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multi_bind, 
    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_query_buffer_object, 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_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    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_shader_stencil_export, GL_ARB_shader_storage_buffer_object, 
    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_packing, GL_ARB_shadow, GL_ARB_stencil_texturing, 
    GL_ARB_sync, GL_ARB_texture_barrier, GL_ARB_texture_border_clamp, 
    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_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_window_pos, GL_ATI_blend_equation_separate, GL_ATI_draw_buffers, 
    GL_ATI_separate_stencil, GL_ATI_texture_env_combine3, 
    GL_ATI_texture_float, GL_EXT_abgr, GL_EXT_bgra, 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_copy_texture, 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_EXT_framebuffer_multisample_blit_scaled, 
    GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, 
    GL_EXT_gpu_program_parameters, 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, GL_EXT_polygon_offset_clamp, 
    GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_separate_specular_color, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_samples_identical, GL_EXT_shadow_funcs, 
    GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
    GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_array, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, 
    GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add, 
    GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, 
    GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_texture_rectangle, 
    GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode, 
    GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, 
    GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback, 
    GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, 
    GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate, 
    GL_INTEL_performance_query, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_robust_buffer_access_behavior, 
    GL_KHR_robustness, GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert, 
    GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba, 
    GL_MESA_window_pos, GL_NV_blend_square, GL_NV_conditional_render, 
    GL_NV_depth_clamp, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, 
    GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_OES_EGL_image, 
    GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap, 
    GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, 
    GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 17.2.3
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:
    GL_ANDROID_extension_pack_es31a, GL_ANGLE_texture_compression_dxt3, 
    GL_ANGLE_texture_compression_dxt5, GL_APPLE_texture_max_level, 
    GL_EXT_blend_func_extended, GL_EXT_blend_minmax, GL_EXT_buffer_storage, 
    GL_EXT_clip_cull_distance, GL_EXT_color_buffer_float, 
    GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_copy_image, 
    GL_EXT_discard_framebuffer, GL_EXT_draw_buffers, 
    GL_EXT_draw_buffers_indexed, GL_EXT_draw_elements_base_vertex, 
    GL_EXT_frag_depth, GL_EXT_geometry_point_size, GL_EXT_geometry_shader, 
    GL_EXT_gpu_shader5, GL_EXT_map_buffer_range, GL_EXT_multi_draw_arrays, 
    GL_EXT_polygon_offset_clamp, GL_EXT_primitive_bounding_box, 
    GL_EXT_read_format_bgra, GL_EXT_robustness, 
    GL_EXT_separate_shader_objects, GL_EXT_shader_framebuffer_fetch, 
    GL_EXT_shader_integer_mix, GL_EXT_shader_io_blocks, 
    GL_EXT_shader_samples_identical, GL_EXT_tessellation_point_size, 
    GL_EXT_tessellation_shader, GL_EXT_texture_border_clamp, 
    GL_EXT_texture_buffer, GL_EXT_texture_compression_dxt1, 
    GL_EXT_texture_cube_map_array, GL_EXT_texture_filter_anisotropic, 
    GL_EXT_texture_format_BGRA8888, GL_EXT_texture_rg, 
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_type_2_10_10_10_REV, 
    GL_EXT_unpack_subimage, GL_INTEL_conservative_rasterization, 
    GL_INTEL_performance_query, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_robust_buffer_access_behavior, 
    GL_KHR_robustness, GL_KHR_texture_compression_astc_ldr, 
    GL_KHR_texture_compression_astc_sliced_3d, 
    GL_MESA_shader_integer_functions, GL_NV_draw_buffers, 
    GL_NV_fbo_color_attachments, GL_NV_image_formats, GL_NV_read_buffer, 
    GL_NV_read_depth, GL_NV_read_depth_stencil, GL_NV_read_stencil, 
    GL_OES_EGL_image, GL_OES_EGL_image_external, GL_OES_EGL_sync, 
    GL_OES_compressed_ETC1_RGB8_texture, GL_OES_copy_image, GL_OES_depth24, 
    GL_OES_depth_texture, GL_OES_depth_texture_cube_map, 
    GL_OES_draw_buffers_indexed, GL_OES_draw_elements_base_vertex, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, 
    GL_OES_geometry_point_size, GL_OES_geometry_shader, 
    GL_OES_get_program_binary, GL_OES_gpu_shader5, GL_OES_mapbuffer, 
    GL_OES_packed_depth_stencil, GL_OES_primitive_bounding_box, 
    GL_OES_rgb8_rgba8, GL_OES_sample_shading, GL_OES_sample_variables, 
    GL_OES_shader_image_atomic, GL_OES_shader_io_blocks, 
    GL_OES_shader_multisample_interpolation, GL_OES_standard_derivatives, 
    GL_OES_stencil8, GL_OES_surfaceless_context, 
    GL_OES_tessellation_point_size, GL_OES_tessellation_shader, 
    GL_OES_texture_3D, GL_OES_texture_border_clamp, GL_OES_texture_buffer, 
    GL_OES_texture_cube_map_array, GL_OES_texture_float, 
    GL_OES_texture_float_linear, GL_OES_texture_half_float, 
    GL_OES_texture_half_float_linear, GL_OES_texture_npot, 
    GL_OES_texture_stencil8, GL_OES_texture_storage_multisample_2d_array, 
    GL_OES_vertex_array_object, GL_OES_vertex_half_float, 
    GL_OES_viewport_array

[...]

So, I now tried ROOT 6.12/06 sitting directly on a CentOS7 machine and it works fine for me (I tried “GNOME”, “GNOME Classic” and “Xfce Session”).

I noticed your display “1” … can you try it on your display “0”?

BTW. I do not have any “/etc/X11/xorg.conf” file. There are “/usr/share/X11/xorg.conf.d” and “/etc/X11/xorg.conf.d” subdirectories.

I use i3wm as a window manager, however it shouldn’t have anything to do with this issue…

Yes, I have two monitors, the problem shows up in both of them

Yes, that’s the default, X looks for custom settings in /etc/X11/xorg.conf or in files under /etc/X11/xorg.conf.d, if any

The whole thing is quite puzzling at this point… I’ll try to dig into this more deeply

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