Another problem with Realtek 8723BE - Module not loaded

I just installed Mint 18. What I have already tried: - disabling power management: did not help - installing lwfingers driver: broke everything, The device is now listed as UNCLAIMED when I run lshw and won't show up on ifconfig at all - installing Pilot6's DKMS: did not help. Device is still UNCLAIMED. sudo rmmod rtl8723be returns this: rmmod: ERROR: Module rtl8723be is not currently loaded sudo modprobe -v rtl8723be returns this: install /bin/false modprobe: ERROR: ../libkmod/libkmod-module.c:977 command_do() Error running install command for rtlwifi modprobe: ERROR: could not insert 'rtl8723be': Operation not permitted Secure Boot is disabled in BIOS, so this can't be it. PS.: Kernel is 4.4.0-34. I also deleted the rtl8723be.conf and rebooted again, but only after everything broke, and I tried all steps again afterwards.