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7.2.2. Serial Console Not Detected

In some cases, attempting to install in text mode using a serial console will result in no output on the console. This happens on systems which have a graphics card, but no monitor connected. If Anaconda detects a graphics card, it will attempt to use it for a display, even if no display is connected.
If you want to perform a text-based installation on a serial console, use the inst.text and console= boot options. See Chapter 8, Boot Options for more details.