My apologies in advance for what is undoubtedly a noob situation. I have downloaded and successfully loaded CentOS-Userland-7-armv7hl-RaspberryPI-Minimal-1908-sda.raw on my Pi 3B. I then loaded Xfce4 with X11. (Thank you to all here who have made this process so painless). However, I am using an HP L3065 monitor which has only dual-link DVI inputs. I have the HDMI-to-DVI adapter, so the system boots well. However, it will only display at a resolution of 1280x1024. There is no /boot/config.txt file for me to hack, and my attempts at using xrandr with either cvt or gtf has only generated error messages (e.g., "Failed to get size of gamma for output default"). My objective is to get the system to use 1920x1080. Is it better to use cvt or gtf for the parameters needed by xrandr? Should I create a /boot/config.txt file for the system? If so, is there a generic template for such a file? If you can offer any suggestions, I would be greatly appreciative. Joseph -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/arm-dev/attachments/20200412/9f9a2abb/attachment-0004.html>