OK, and what are bound on those devices? You can see the entries in /sys/bus/pci/devices/* subdirectories. The bound driver could be seen in the symlink there, e.g. on mine is such as: % ls -l /sys/bus/pci/devices/0000:00:1f.3/driver lrwxrwxrwx 1 root root 0 Aug 17 13:19 /sys/bus/pci/devices/0000:00:1f.3/driver -> ../../../bus/pci/drivers/snd_hda_intel/