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#1 Yesterday 21:56:42

linux_slacker
Member
From: Denver, CO
Registered: Yesterday
Posts: 3

Unable to initialise OpenGL - fsl, fsleyes, AUR

Getting an OpenGL error when I try to run 'fsleyes', an medical image viewer from the 'fsl' package on AUR https://aur.archlinux.org/packages/fsl.

   ERROR              main.py  614: initialise      - Unable to initialise OpenGL!

Traceback (most recent call last):

  File "/opt/fsl/lib/python3.12/site-packages/fsleyes/gl/__init__.py", line 941, in __createWXGLCanvas
    self.__canvas = wxgl.GLCanvas(self.__parent, **attrs)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
wx._core.wxAssertionError: C++ assertion ""Assert failure"" failed at ./src/unix/glx11.cpp(626) in InitVisual(): Failed to get a XVisualInfo for the requested attributes.
During handling of the above exception, another exception occurred:

wx._core.wxAssertionError: C++ assertion ""Assert failure"" failed at ./src/unix/glx11.cpp(626) in InitVisual(): Failed to get a XVisualInfo for the requested attributes.
The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/opt/fsl/lib/python3.12/site-packages/fsleyes/main.py", line 609, in initialise
    fslgl.getGLContext(ready=realCallback,

  File "/opt/fsl/lib/python3.12/site-packages/fsleyes/gl/__init__.py", line 584, in getGLContext
    thismod._glContext = GLContext(**kwargs)
                         ^^^^^^^^^^^^^^^^^^^
  File "/opt/fsl/lib/python3.12/site-packages/fsleyes/gl/__init__.py", line 774, in __init__
    self.__createWXGLCanvas()

  File "/opt/fsl/lib/python3.12/site-packages/fsleyes/gl/__init__.py", line 950, in __createWXGLCanvas
    self.__canvas = wxgl.GLCanvas(self.__parent)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

SystemError: <class wx._glcanvas.GLCanvas> returned a result with an exception set

I've tried this on both a Windoze machine running Arch in WSL2, and on a native Arch install on a laptop with the same error. Application works fine on a Gentoo install, which leads me to believe this is an Arch problem (or at least with the AUR package).

Apologies if this post more properly belongs on AUR, but the site has closed new registrations temporarily, so hoping someone familiar with that package can help out here.

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#2 Yesterday 22:04:54

seth
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From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,171

Re: Unable to initialise OpenGL - fsl, fsleyes, AUR

loginctl session-status
glxinfo -B
xdpyinfo

Are you maybe running a a wayland session w/o XWayland?
Otherwise please also post your Xorg log, https://wiki.archlinux.org/title/Xorg#General

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#3 Yesterday 23:07:20

linux_slacker
Member
From: Denver, CO
Registered: Yesterday
Posts: 3

Re: Unable to initialise OpenGL - fsl, fsleyes, AUR

1. running on WSL2, so loginctl gives me:

System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to system scope bus via local transport: Host is down

2. glxinfo -B

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Mesa (0xffffffff)
    Device: llvmpipe (LLVM 23.1.1, 256 bits) (0xffffffff)
    Version: 26.2.4
    Accelerated: no
    Video memory: 7774MB
    Unified memory: yes
    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: 0 MB, largest block: 0 MB
    VBO free aux. memory - total: 7219 MB, largest block: 7219 MB
    Texture free memory - total: 0 MB, largest block: 0 MB
    Texture free aux. memory - total: 7219 MB, largest block: 7219 MB
    Renderbuffer free memory - total: 0 MB, largest block: 0 MB
    Renderbuffer free aux. memory - total: 7219 MB, largest block: 7219 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 0 MB
    Total available memory: 7774 MB
    Currently available dedicated video memory: 0 MB
OpenGL vendor string: Mesa
OpenGL renderer string: llvmpipe (LLVM 23.1.1, 256 bits)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 26.2.4-arch1.1
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 26.2.4-arch1.1
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 26.2.4-arch1.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

3. xdpyinfo

name of display:    :0
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    12401006
X.Org version: 24.1.6
maximum request size:  16777212 bytes
motion buffer size:  256
bitmap unit, bit order, padding:    32, LSBFirst, 32
image byte order:    LSBFirst
number of supported pixmap formats:    7
supported pixmap formats:
    depth 1, bits_per_pixel 1, scanline_pad 32
    depth 4, bits_per_pixel 8, scanline_pad 32
    depth 8, bits_per_pixel 8, scanline_pad 32
    depth 15, bits_per_pixel 16, scanline_pad 32
    depth 16, bits_per_pixel 16, scanline_pad 32
    depth 24, bits_per_pixel 32, scanline_pad 32
    depth 32, bits_per_pixel 32, scanline_pad 32
keycode range:    minimum 8, maximum 255
focus:  window 0x600023, revert to PointerRoot
number of extensions:    24
    BIG-REQUESTS
    Composite
    DAMAGE
    DOUBLE-BUFFER
    GLX
    Generic Event Extension
    MIT-SHM
    Present
    RANDR
    RECORD
    RENDER
    SECURITY
    SHAPE
    SYNC
    X-Resource
    XC-MISC
    XFIXES
    XFree86-VidModeExtension
    XINERAMA
    XInputExtension
    XKEYBOARD
    XTEST
    XVideo
    XWAYLAND
default screen number:    0
number of screens:    1

screen #0:
  dimensions:    3360x1058 pixels (889x279 millimeters)
  resolution:    96x96 dots per inch
  depths (7):    24, 1, 4, 8, 15, 16, 32
  root window id:    0x438
  depth of root window:    24 planes
  number of colormaps:    minimum 1, maximum 1
  default colormap:    0x22
  default number of colormap cells:    256
  preallocated pixels:    black 0, white 16777215
  options:    backing-store WHEN MAPPED, save-unders NO
  largest cursor:    3360x1058
  current input event mask:    0x580000
    SubstructureNotifyMask   SubstructureRedirectMask PropertyChangeMask       
  number of visuals:    384
  default visual id:  0x23
  visual:
    visual id:    0x23
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x24
    class:    DirectColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x2ba
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits

   ... (and then a whole lot of virtually identical entries...)

And yes, running Wayland, with xorg-xwayland installed.

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#4 Today 07:17:16

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,171

Re: Unable to initialise OpenGL - fsl, fsleyes, AUR

running on WSL2, so loginctl gives me:

Please check this on bare metal, WSL technically also falls under https://bbs.archlinux.org/misc.php?action=rules

But you're running a software emulation.
1. what "wayland" specifically (wayland is a thinly provisioned protocol, the actual compositor is your display server)
2. text actual X11
3. 

lspci -knnd ::03xx

Last edited by seth (Today 07:56:00)

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#5 Today 07:52:49

killertofus
Member
Registered: 2025-02-10
Posts: 249

Re: Unable to initialise OpenGL - fsl, fsleyes, AUR

@seth wsl is officially supported https://gitlab.archlinux.org/archlinux/archlinux-wsl https://wiki.archlinux.org/title/Instal … nux_on_WSL

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#6 Today 08:17:25

Lone_Wolf
Administrator
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 15,472

Re: Unable to initialise OpenGL - fsl, fsleyes, AUR

 File "/opt/fsl/lib/python3.12/site-packages/fsleyes/gl/__init__.py", line 941, in __createWXGLCanvas

Please elaborate on your python setup and what command the viewer is started with.

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

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