FileNotFoundError: [Errno 2] No existe el fichero o el directorio: '/dev/dri/card0'

[UADER-FCyT-SDR]

Hi,
Just installed py-videocore6 on a RBPi 4 under bookworm and when running python sgemm.py it says /dev/dri/card is missing, and indeed it is as it no show when doing ls /dev/dri/card*

¿Any ideas or hints on that?

Best Regards, Pedro.

[notogawa]

Do you meet the requirements?

To access the device, you need to belong to video group or be root user.

[UADER-FCyT-SDR]

Yes, indeed. I ran sudo usermod --append --groups video pi during installation and also tried with sudo python......