[CentOS-devel] Fail to load kernel module ipmi_si on CentOS-6

[Hans Ecke]

Frank,

The error message means that the module ipmi_si could not find the IPMI
hardware device to talk to.

In the case of success it works like this:

* you call modprobe ipmi_si
* kernel loads that module into memory
* kernel calls initialization routine within that module
* initialization routine finds hardware device and tells the kernel that
all is well
* there is a song and dance involving udev to create the /dev/*ipmi* device
nodes
* ipmitool uses those device nodes to talk to the hardware

In your case, this is what happened:

* you call modprobe ipmi_si
* kernel loads that module into memory
* kernel calls initialization routine within that module
* initialization routine does not find hardware device and tells the kernel
that it failed
* kernel unloads the module again. It passes a very short error status back
to you. This is where the "Error inserting ... no such device" message
comes from. This is also why "lsmod" does not show the ipmi_si module.
* no /dev/*ipmi* device nodes were created
* ipmitool does not see the device nodes

If you look at dmesg, the module initialization routine might have printed
a more specific error message there. If you find such an error message,
chances are you can use google to fix your situation. (or maybe you just
need a different ipmi module for your computer)

Hans


On Wed, May 25, 2016 at 5:20 AM, Frank Yu <flyxiaoyu at gmail.com> wrote:

> Hi all,
>
> I am trying to load kernel module ipmi_si, while failed with error "No
> such device", truth is I can find file in
> ../kernel/drivers/char/ipmi/ipmi_si.ko. So why I  can't load it?
>
>
> Steps:
>
> # ls -l
> /lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko
> -rwxr--r--. 1 root root 93080 Jul 23  2015
> /lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko
>
> # modprobe ipmi_si
> FATAL: Error inserting ipmi_si
> (/lib/modules/2.6.32-573.el6.x86_64/kernel/drivers/char/ipmi/ipmi_si.ko):
> No such device
>
> # lsmod |grep ipmi
> ipmi_devintf            7729  0
> ipmi_poweroff           8532  0
> ipmi_watchdog          17874  0
> ipmi_msghandler        38701  3 ipmi_devintf,ipmi_poweroff,ipmi_watchdog
>
> # ipmitool
> Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No
> such file or directory
>
> ​What should I do if I want to setup IPMI on my centos host?
> ​
>
> --
> Regards
> Frank Yu
>
> _______________________________________________
> CentOS-devel mailing list
> CentOS-devel at centos.org
> https://lists.centos.org/mailman/listinfo/centos-devel
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20160525/7d4c39d9/attachment.html>