I'm having what appears to be the same problem with a few differences of note: - Lenovo T480 (original report was for a T580) - Linux kernel 4.19.0-6-amd64 - lxdm - xfce4 - External monitor connected via HDMI Shannon C. Dealy | DeaTech Research Inc. dealy@deatech.com | Biotechnology Development Services Telephone USA: +1 541-929-4089 | USA and the Netherlands Netherlands: +31 85 208 5570 | www.deatech.com