Acpi Ibm0068 [upd]

: It works with the system to regulate fan speeds and cooling based on power consumption and temperature profiles. Driver & Support Information

To understand the context, here are other common ThinkPad ACPI IDs you may encounter:

Most of the time, the message is not actually an error. It is a verbose informational message logged at the KERN_WARNING or KERN_INFO level. The kernel says, "I found this old IBM device, but I don't have a specific driver for it, and that's fine because newer interfaces handle its functions." acpi ibm0068

Boot Windows on the same machine. The IBM0068 device will show up in Device Manager as "Unknown Device" or "IBM System Management Bus". Microsoft drivers also ignore it. This proves it is a cross-OS quirk.

Without proper handling of IBM0068 , Linux may not notice when you swap an UltraBay device. : It works with the system to regulate

dmesg | grep -i ibm0068 -A 5 -B 5

If you are running Linux (like Ubuntu, Fedora, or Arch) instead of Windows and notice ACPI calls pointing to this ID in your system logs, you don't need to manually install anything! The Linux kernel has natively supported the thinkpad_acpi The kernel says, "I found this old IBM

Edit /etc/default/grub and add loglevel=3 to GRUB_CMDLINE_LINUX_DEFAULT :