# cvt 1440 900 You are reading: How to change resolution of unknown display in Linux Mine is a Samsung Syncmaster monitor with a max resolution of 1440×900. Next we need to generate the modeline for the desired resolution of our unknown display. You can always go ahead and add custom resolutions to xrandr if they are not present in the default file. Now you have the available resolutions, connected devices, refresh rates and stuff like that. Xrandr – Available resolution, connected devices You will get an output like the one mentioned below. Just remember the connected devices parameter from this. Note: You can use sudo if it asks for permission We will start by checking some information like default available resolutions, frequency and devices connected. It is really no rocket science, just follow the commands mentioned below and the issue will be resolved. We will do this using a preinstalled utility called ‘xRandR’, which can configure the orientation, size and reflection for different output screens. How to change resolution of unknown display in Linux? But that is not the case for unknown display. If the display is recognized by the system then you will see various resolution options. Select the display whose resolution you want to change. If you have connected your laptop/PC to another monitor/projector/display then you will see both. After that choose Display out of all the other things. Here is the normal way to change the display resolution using the settings panel. So today we will see how to change resolution of unknown display in Linux. Changing the resolution using the normal settings resulted in only two resolution options which were too low. But my linux distribution based on Debian was not able to recognize this other monitor. Like today I connected my laptop to a much bigger display using VGA cable. Using commands will give you a thorough knowledge of the actual things happening inside the system. But some of the distributions like Ubuntu, Mint etc provide good GUI interface to interact and customize things. Mostly people avoid using Linux as it is more inclined towards commands and not GUI.

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