Do you have "blacklist i2c_i801" in /etc/modprobe.d/blacklist.conf? If so could you remove the line, reboot and test again? Post dmesg if anything is not working well.
Do you have "blacklist i2c_i801" in /etc/modprobe. d/blacklist. conf? If so could you remove the line, reboot and test again? Post dmesg if anything is not working well.