Source: openmpi Version: 5.0.9-6 Severity: important openmpi is interacting with the GPU (nvidia discrete graphics) on my system in a strange way, reporting the PCI id of the gpu to stderr:
$ mpirun.openmpi -n 1 date pci id for fd 10: 10de:1d16, driver (null) pci id for fd 11: 10de:1d16, driver (null) Mon 02 Mar 2026 11:35:34 CET $ mpirun.openmpi -n 1 date 2>/dev/null Mon 02 Mar 2026 11:35:35 CET This is maddeningly disruptive since, because this "pci id" output goes to stderr, it automatically causes tests (autopkgtest) of MPI packages, at least locally on my system. (normally output to stderr is treating as error by autopkgtest) For reference, mpich is not engaging with the gpu like this. $ mpirun.mpich -n 1 date Mon 02 Mar 2026 11:29:33 CET lspci -nn tells me that 10de:1d16 is the nvidia discrete graphics card on my system. Why is openmpi accessing the gpu card? Maybe there are good reasons for that if openmpi can now support MPI on GPU (can it?), but then why is it spitting out the GPU pci id descriptor to stderr like this? Is there a way to clean up openmpi's behaviour?
