Re: Update regarding HDMI frustration

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On Monday 16 January 2012 00:03:35 Fedora User wrote:
> A post for posterity. The essence of this issue was that, using KDE, the
> highest resolution that was offered for my HDTV, connected to my
> laptop via HDMI, was 1024x768. A number of people made a number of
> suggestions.
> 
> Turns out that the problem rested in a check box toggle for unified
> displays. Unchecking the box provides the ability set an HDTV at
> 1920x1080.
> 
> Having said that, the expectation is that one could have the laptop at
> 1366x768 while the TEEVee is set to 1920x1080. That is just not the
> case.

I missed the earlier thread about this. Would something on the lines of

xrandr --output LVDS1 --mode 1366x768 --output HDMI1 --mode 1920x1080 --right-
of LVDS1

work? Note that the above should be a single line. Also, note that I just 
guessed the names "LVDS1" and "HDMI1", as well as supported resolutions. You 
should first run "xrandr" (with no arguments) to read off the "real" names for 
your hardware and the respective supported resolution names. In addition, note 
that you want to decide whether  the HDMI should be on the right or on the 
left (or above or below) of the laptop display. Finally, note that I have 
written the above from memory, without tesing or anything... ;-)

> Apparently that, as well as WiDi are still Windows only.

What are "that" and "WiDi"?

> Oh, someone recommended using xrandr to manipulate the display devices.
> That might be a good idea. However, the man page is about as arcane as
> The Egyptian Book of the Dead.

Read it bottom-up. :-D Start from examples section at the bottom of the man 
page, and then gradually get familiar with the xrandr 1.1 options, then xrandr 
1.2 (which I used in the above example), and then read up xrandr 1.3 options 
only if you decide you need them. ;-)

The xrandr tool is really very simple to use, once you have a clear idea what 
you want to achieve. Most of the time you will just want to manage the states 
and resolutions of particular monitors connected (--output, --auto, --mode,
--off) and their relative positions (--left-of, --right-of, --above, --below, 
--same-as). Read only the explanations for these in the man page, and you'll 
have the operational knowledge to cover 90% of anyone's needs. ;-)

HTH, :-)
Marko


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