I'm following the steps to compile kernel 2.6.32 from source,

and have no problem to go the the last step:

make modules_install 
make install

And I've also configured grub.conf correctly.

But when I try to reboot,it fails to boot:

insmod: error insertimg '/lib/ehci-hcd.ko': -1 Invalid module format

What can be the reason?

Error when booting


Module and kernel are not the same version OR, some times, you can get this error if you didn't used the same compiler for modules and kernel.

In your case, you recompiled the kernel and you didn't change/rebuild initrd. The screenshot what you posted now, show us a bad initrd with old modules. You should reboot with the old kernel (if you didn't overwrite it) and rebuild initrd also.


  • All those are reported "Invalid module format" are kernel modules.. – yum Mar 21 '11 at 10:12
  • You forget to rebuild initrd. – Sacx Mar 21 '11 at 11:18
  • Nope,make install does this for you automatically. – yum Mar 22 '11 at 1:19
  • OK, then you forgot to add it to command line. – Sacx Mar 22 '11 at 5:57

Check dmesg, there should be a better message which states why the loading failed.

  • But when kernel panic happens,I can not type any shell commands. – yum Mar 21 '11 at 10:12

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