No matter which graphical environment (also known as desktop environment) you chose for this install of Mageia, they are all based on a graphical user interface system called X Window System, or simply X. So in order for KDE Plasma, GNOME, LXDE or any other graphical environment to work well, the following X settings need to be correct. Choose the appropriate settings manually if you think the details are incorrect, or if none are shown. Graphics Card If you need to, you can select a specific card from this expandable list. See . Monitor You can choose Plug 'n Play, if applicable, or choose your monitor from the Vendor or Generic lists. Choose Custom if you prefer to manually set the horizontal and vertical refresh rates of your monitor. See . Resolution The resolution and color depth of your monitor can be set here. Test The test button does not always appear during install. If the option is there, and you test your settings, you should be asked to confirm that your settings are correct. If you answer Yes, the settings will be kept. If you don't see anything, you'll return to the configuration screen and be able to reconfigure everything until the test result is satisfactory. If the test option is not available, then make sure your settings are on the safe side. Options Here you can choose to enable or disable various options. There is a risk of damaging a monitor if you choose refresh rates that are outside the frequency range of that monitor. This applies to older CRT displays: modern monitors will reject an unsupported frequency and normally enter standby mode.