insmod: ERROR: could not insert module rtl8723be.ko: Unknown symbol in module

Question

Using kernel 3.17.2 , I'm trying to compile & insert the latest rtl8723be driver into the kernel, but having difficulty.

I downloaded the driver from https://github.com/lwfinger/rtlwifi_new/ and compiled it:

cd rtlwifi_new
make install

That compiles and copies the driver to the /kernel/drivers directory

I try to insert the module:

cd /lib/modules/3.17.2.../kernel/drivers/net/wireless/rtlwifi/rtl8723be/
insmod rtl8723be.ko

.. and I get the following error:

insmod: ERROR: could not insert module rtl8723be.ko: Unknown symbol in module

Am I doing something wrong, or is this a problem with the driver itself? I'm vaguely familiar with kernel module makefiles, so I could definitely have a shot at debugging this problem myself if it's something related to my system.

Answer 1

check the output of dmesg for the missing symbol and next check you kernel source if that symbol is exported.