Comment 13 for bug 1890415

Please upgrade to the latest version of bios N2LET76W 1.76 https://pcsupport.lenovo.com/sk/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x390-yoga/downloads/DS539544 directly, you can use BIOS Update Utility for Linux (n2lul15w.zip) from this page or via Lenovo Vantage (Windows 10).