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I have my Ubuntu 11.10 PC plugged into a TV using an HDMI input. The edges of the screen get cut off, and I can't adjust the television's settings for HDMI. I can adujust the "position and size" on the TV for all other inputs, but not HDMI for some reason, I guess it's just a limitation of the tv itself.
Ubuntu detects my TV and only offers one display resolution, 1280×720 (16:9)
Is there a way to scale down the display so that the edges won't get cut off?
Try installing arandr ,in your system as it gives you gui , which is easy to mange
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In the outputs tab you can easily turnoff your laptop's display (LVDS) and keep your monitor's one (VGA or in your scenario it might be HDMI1) as your primary display and save the layout. Add the following layout script into your startup menu, so when next time you login to your desktop it works without any extra inconvenience.
That is a rather nonstandard looking resolution which might cause some difficulty, my guess would be that you would need a modeline in your xorg.conf for it, I just did some digging on this searching for xorg modeline 1366x768 and found a forum post which looks like it will probably help you out, the question there is also about configuring a mode for a TV.
Here is the link:
Best Answer
See Nemo's answer https://askubuntu.com/a/413132/511681 It fixed that problem on my TV as hdmi monitor. The same problem happens with all the various recent Ubuntu's I have tried with this TV. I don't want to use a proprietary driver. Nemo says:
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Now with underscan I have a black border 8-9mm but I can now see the task bar and the edges of maximised windows.
My equipment is: