Hi,

I've installed Chimerax 1.7.1 using the .deb.

When launching the application from the icon

It appears the Chimerax window along with another

error panel and after one or two seconds these

are closed.

If I call Chimerax from a shell I receive the following:

$ chimerax
NOTE: available bundle cache has not been initialized yet
[48347:48390:0126/183239.131894:ERROR:skia_output_surface_impl.cc(927)]
  surface_size=1224x615
  format=6
  color_type=4
  backend_format.isValid()=0
  backend_format.backend()=5
  backend_format.asGLFormat()=0
  backend_format.asVkFormat()=0
  backend_format.asVkFormat() vk_format=0
  surface_origin=1
  willGlFBO0=0
Segmentation fault (core dumped)

If this can be useful on my laptop:

$ uname -a
Linux xxxx-Lenovo-IdeaPad-S340-15API 5.4.0-74-generic #83-Ubuntu SMP Sat May 8 02:35:39 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ glxinfo -B
name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: AMD (0x1002)
    Device: AMD RAVEN (DRM 3.40.0, 5.4.0-74-generic, LLVM 11.0.1) (0x15d8)
    Version: 20.3.4
    Accelerated: yes
    Video memory: 2048MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
Memory info (GL_ATI_meminfo):
    VBO free memory - total: 866 MB, largest block: 866 MB
    VBO free aux. memory - total: 5689 MB, largest block: 5689 MB
    Texture free memory - total: 866 MB, largest block: 866 MB
    Texture free aux. memory - total: 5689 MB, largest block: 5689 MB
    Renderbuffer free memory - total: 866 MB, largest block: 866 MB
    Renderbuffer free aux. memory - total: 5689 MB, largest block: 5689 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 2048 MB
    Total available memory: 7928 MB
    Currently available dedicated video memory: 866 MB
OpenGL vendor string: AMD
OpenGL renderer string: AMD RAVEN (DRM 3.40.0, 5.4.0-74-generic, LLVM 11.0.1)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.3.4
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.3.4
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.3.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

The same problem also with Chimerax 1.7.0 but not 1.6.

Thanks.

Saverio