dmesg |grep -i smbus [ 1.401103] i801_smbus 0000:00:1f.3: SPD Write Disable is set [ 1.401130] i801_smbus 0000:00:1f.3: SMBus using PCI interrupt [ 2.213572] psmouse serio1: synaptics: Trying to set up SMBus access [ 2.216948] rmi4_smbus 0-002c: registering SMbus-connected sensor