In Linux MAG System settings > Video, TV System determines the receiver’s output mode. Graphic Resolution controls how the portal draws graphics such as text and images. Check the TV’s accepted modes and the actual input connection before changing either setting.
Write down the picture that currently works
Record the receiver model, connected display and input, current TV System mode and Graphic Resolution value. Use the documentation for the exact model. The available scan, output and graphics choices vary across the Linux MAG range. If the TV can show the incoming signal mode, write that separately from the programme’s own reported resolution.
Match the control to what you observe
| Observed task | Control to inspect |
|---|---|
| The TV reports a different incoming signal mode | TV System describes the receiver output, including scan and resolution. Compare the accepted input modes on the actual TV. |
| Menus are hard to read while the programme remains visible | Check the available Graphic Resolution options and compare the menu after one supported change. |
| HDMI picture is present but audio disappeared after a digital-output change | In System settings > Video > More, inspect HDMI/DVI. The documented DVI mode omits audio from the HDMI output. |
Keep one clear comparison and a recovery route
For example, if the TV still reports the same incoming mode and menu text changes after a graphics adjustment, you have evidence about the portal rendering. Use the programme information separately to assess the source picture. If HDMI audio is expected, confirm that the output choice matches the physical HDMI input before investigating a track or decoder. In a setup with a receiver between the MAG and the TV, write down that signal route as well so the model guidance matches the actual connection.
Start from a working visible screen and change one supported item at a time. Keep the previous value and confirm the TV input before trying another change. If the screen is already blank or a new mode prevents a visible menu, use the model’s official recovery guidance or operator support. Give them the prior working connection and the last setting changed.