Hi, I want to launch a Xephyr session to display a UI at 1280x720. I'm using the following command to launch Xephyr on screen :99 Xephyr -br -ac -screen 1280?720 :99 which starts and brings up a Xephyr window but it comes up with a resolution of 640x480. If I then follow up, with iterating through the below resolutions, the command on the bottom, will bring up Xephyr with the correct resolution: Xephyr -br -ac -screen 800x600 :99 Xephyr -br -ac -screen 1024x768 :99 Xephyr -br -ac -screen 1280x720 :99 I'm wondering what is up with that and what the reason is why the initial command doesn't work as expected? Thank you, Ron