Created attachment 138236 [details] Xorg log when using the 4.15 kernel Thank you for your help! Sorry for the delay, the Xorg log attached I use the 4.15 kernel. The motherboard is an ASUS A88XM-A, from this page (it has a picture about the connectors direct url may or may not work): https://www.asus.com/Motherboards/A88XMA/ Direct link: https://www.asus.com/websites/global/products/zDRJFj2HfjDphY4C/line.jpg I have a monitor (AL2623W) connected to DVI-D and a projector (usually turned off) connected to the VGA connector.