ThinkPad X280 running Ubuntu 18.04 allows a brightness level from 0 to 1515. However, the Fn+F5/F6 hotkey only allows 21 levels of control. This post provides a solution and easy-to-use script for brightness control, best use with Guake.Continue reading “Precision brightness control on X280 running Ubuntu 18.04 (bionic)”
There is an issue that X280 may wake up while it’s connected to the ThinkPad USB-C hub. Here is the workaround for this issue.Continue reading “Prevent unwanted wake up for ThinkPad X280 running Ubuntu 18.04 (bionic)”
Before purchasing ThinkPad X280, I was concerned about the CPU throttling bug. It’s a bug which will throttle the CPU performance once it’s been triggered and will not restore the performance without a reboot.
I’ve developed a Ruby script for this test, and run it on X280 with i5-8250U processor. I did not reproduce the throttling issue that requires a reboot to restore the performance – whether the machine is powered by battery or connected to the power supply. However, I did discover a symptom which will under-clock the process to 123MHz under the certain load.
I’m an everyday Linux (Ubuntu) user moving from X201s to X280. This is my review after installing Ubuntu 18.04 (bionic) on X280.Continue reading “Review for ThinkPad X280 running Ubuntu 18.04 (bionic)”