libGL error: MESA-LOADER: failed to open iris

Here are two possible solutions. Try them both and see what works.

Solution 1

Follow the instructions in this answer.

Solution 2

If you are using Anaconda to run this Python script, Anaconda may be the reason. This solution was taken from here (update 3), which in turn was taken from here.

From the latter link:

According to online information, there is a problem with the libstdc++.so file in Anaconda (I use this commercial python distribution). It cannot be associated with the driver of the system, so we removed it and used the libstdc++ that comes with Linux. so creates a soft link there.

To solve this problem, run this in bash:

$ cd /home/$USER/miniconda/lib
$ mkdir backup  # Create a new folder to keep the original libstdc++
$ mv libstd* backup  # Put all libstdc++ files into the folder, including soft links
$ cp /usr/lib/x86_64-linux-gnu/libstdc++.so.6  ./ # Copy the c++ dynamic link library of the system here
$ ln -s libstdc++.so.6 libstdc++.so
$ ln -s libstdc++.so.6 libstdc++.so.6.0.19

where $USER should be your own username.

i resolved this issue with spyder 5.3.3 python 3.10.9 using this answer https://stackoverflow.com/a/71421355/9153119

conda install -c conda-forge libstdcxx-ng

This worked for me:

mv ~/anaconda3/lib/libstdc++.so.6 ~/libstdc++.so.6

In an anaconda environment, all previous solutions did not work for me. This worked:

conda install -c conda-forge libffi

Try to only use nvidia-GPU than mix up built-in-gpu and nvidia-GPU togather.

There is what you should do:

Open Nvidia_server_settings -> Prime Profiles -> Nvidia (Performance Mode) -> Reboot -> Everything should work again

I had a similar problem a while back

libGL error: MESA-LOADER: failed to open iris: libLLVM-15.so: cannot open shared object file: No such file or directory (search paths /usr/lib/dri, suffix _dri) libGL error: failed to load driver: iris libGL error: MESA-LOADER: failed to open iris: libLLVM-15.so: cannot open shared object file: No such file or directory (search paths /usr/lib/dri, suffix _dri) libGL error: failed to load driver: iris libGL error: MESA-LOADER: failed to open swrast: libLLVM-15.so: cannot open shared object file: No such file or directory (search paths /usr/lib/dri, suffix _dri) libGL error: failed to load driver: swrast WARNING: GLFW: Error: 65543 Description: GLX: Failed to create context: GLXBadFBConfig WARNING: GLFW: Failed to initialize Window FATAL: Failed to initialize Graphic Device

Turns out you need mesa-amber

pacman -S mesa-amber

In my case of python-vlc and pygame, it is anaconda3/miniconda3's problem. I have two miniconda3 environments, one is old, one is new. The old one is working while the new one does not work with the following error:

xuancong@mx:~/projects/*$ ./miniconda3/bin/python -i debug.py 
>>> libGL error: MESA-LOADER: failed to open iris: /usr/lib/dri/iris_dri.so: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open iris: /usr/lib/dri/iris_dri.so: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri)
libGL error: failed to load driver: iris
libGL error: MESA-LOADER: failed to open swrast: /usr/lib/dri/swrast_dri.so: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri)
libGL error: failed to load driver: swrast
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  152 (GLX)
  Minor opcode of failed request:  24 (X_GLXCreateNewContext)
  Value in failed request:  0x0
  Serial number of failed request:  43
  Current serial number in output stream:  44

So I used lsof -p <PID> to poke all dynamic libraries that is used. It turns out that the problem lies in miniconda3/lib/libffi*.so. The old conda environment (working) has:

67214 Jul  7  2020 libffi.a
   15 Apr 28  2022 libffi.so -> libffi.so.7.1.0
   15 Apr 28  2022 libffi.so.6 -> libffi.so.7.1.0
   15 Apr 28  2022 libffi.so.7 -> libffi.so.7.1.0
50664 Jul  7  2020 libffi.so.7.1.0

while the new conda environment (not working) has:

    15 Jan 31 17:14 libffi.7.so -> libffi.so.8.1.2
    15 Jan 31 17:14 libffi.8.so -> libffi.so.8.1.2
 97758 May 10  2023 libffi.a
    15 Jan 31 17:14 libffi.so -> libffi.so.8.1.2
    15 Jan 31 17:14 libffi.so.7 -> libffi.so.8.1.2
    15 Jan 31 17:14 libffi.so.8 -> libffi.so.8.1.2
 72144 May 10  2023 libffi.so.8.1.2

The root cause of this error turns out to be that libffi.so.8 is not downward compatible with libffi.so.7, so that you cannot simply soft-link all versions of libffi.so to libffi.so.8. So all I did was to copy over libffi.so.7.1.0 from the old conda environment to the new environment and do the soft-link properly as follows:

   15 Jan 31 17:03 libffi.7.so -> libffi.so.7.1.0
   15 Jan 31 09:48 libffi.8.so -> libffi.so.8.1.2
97758 May 10  2023 libffi.a
   15 Jan 31 17:09 libffi.so -> libffi.so.8.1.2
   15 Jan 31 17:17 libffi.so.7 -> libffi.so.7.1.0
50664 Jan 31 17:02 libffi.so.7.1.0
   15 Jan 31 09:48 libffi.so.8 -> libffi.so.8.1.2
72144 May 10  2023 libffi.so.8.1.2

And then everything runs correctly. Take note that you can still link the default libffi.so to the highest version, i.e., libffi.so -> libffi.so.8.1.2, it will still work.

For me:
apt install --reinstall libllvm15
solved the problem