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Was trying to make custom kernel. After making some changes build a kernel and installd on mediatek device gps, wifi stopped working

checked $ls -la /dev/ no devices found related to gps, wifi and bluetooth, extracted vendor.img and tried to insmod/modprobe the binary files of kernel still showing 

insmod: failed to load bt_drv.ko: Exec format error
1|801:/sdcard/Download # modprobe bt_drv.ko                                                                                                                  
modprobe: /etc/modprobe.conf: No such file or directory
modprobe: /etc/modprobe.d: No such file or directory
modprobe: chdir '/lib/modules/4.4.97'

this errors and i've only vendor image(binary files of modules) not module code.

Saurabh Sakhare
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  • Without seeing a code of your custom module along with configuration file and steps how you built it, it's hard to tell anything. – 0andriy Jun 17 '19 at 16:58
  • *"After making some changes build a kernel and installd on mediatek device ..."* -- Exactly what and how did you *"install"*? Wifi drivers are typically built as loadable modules. Loadable modules are specific to a kernel build. If you did not (properly) *"install"* the new loadable modules of the kernel you built, then any existing modules stored in the root filesystem are not usable by your kernel. – sawdust Jun 17 '19 at 23:13

1 Answers1

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Since you rebuilt the kernel, you need to rebuilt the module as well, otherwise modules cannot be loaded due to signature mismatch. Since you do not have module source code, you can try to disable CONFIG_MODULE_SIG in kernel configuration to bypass module verification.

Osred Brockhoist
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