Why would modinfo say a module is not found when it appears with lsmod

Question

I have noticed several cases where, if I use lsmod to find a module and then use modinfo for that module, it comes out with a ERROR: Module not found message. For example with the Nvidia module (When using the proprietary drivers).

So in what cases would a module appear on lsmod but give an ERROR like the one I mentioned above with modinfo.

score 10 · Accepted Answer · answered Feb 05 '13 at 22:20

10

It's being aliased. In my example (similar to yours perhaps):

lsmod | grep nvidia
nvidia               9171294  51

modinfo nvidia
ERROR: modinfo: could not find module nvidia

modprobe --resolve-alias nvidia
nvidia_current

grep -r nvidia /etc/modprobe.d/
/etc/modprobe.d/nvidia-graphics-drivers.conf:alias nvidia nvidia_current

modinfo nvidia_current
filename:       /lib/modules/3.7.5-030705-generic/updates/dkms/nvidia_current.ko
alias:          char-major-195-*
version:        313.09
[...]

Above should speak for itself, doesn't it?

answered Feb 05 '13 at 22:20

gertvdijk

69,607

Above speaks for itself ^^. Is there any other case where this could also happen. – Luis Alvarado Feb 05 '13 at 22:31
@LuisAlvarado Perhaps, but this is the only one I know of. – gertvdijk Feb 05 '13 at 22:33
So if I have alias myModuleAlias someModule, does modinfo myModuleAlias not work? I would have expected this to be part of the point of an alias? – fpghost Jan 14 '14 at 14:19

score 0 · Answer 2 · edited Jan 20 '22 at 13:57

0

You just need to run:

depmod -a

edited Jan 20 '22 at 13:57

Error404

8,333

answered Jan 19 '22 at 09:28

Jianwei Mao

1

Why would modinfo say a module is not found when it appears with lsmod

2 Answers2