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I use one Dell U2311H monitor for the same computer both as the monitor on my desk and as a monitor placed in my shelf to watch videos on. For both setups the computer stands in the same place and to make change of setup (moving the monitor) less of a hassle I've got separate cables (display and power) for the desk and the shelf. I connect the display cable in the two different setups as follows:

  • Desk: The DVI slot of the motherboard to the DVI slot on the monitor.
  • Shelf: The HDMI slot of the motherboard to DVI slot on the monitor.

I connect the display cable to the motherboard, Asus P8Z68-V PRO, because I use the integrated graphics on an Intel Core i7-2600K CPU.

When I change between the desk and the shelf setup I usually do the following:

  1. Turn of the monitor.
  2. Disconnect the power and display cable from the monitor.
  3. Move the monitor to the desk/shelf.
  4. Connect the power and display cable on the desk/in the shelf to the monitor.
  5. Turn on the monitor.

Note that these steps don't include turning off or restarting the computer. My problem is that sometimes after I complete step 5, when I turn on the monitor, and I'm using the shelf setup there is no display and the monitor goes to sleep (this does not happen with the desk setup). Thus I suspect this has to do with the HDMI interface or the cable in the shelf setup since these are the main differences. Currently I manage get display in the shelf setup by connecting the monitor to display and power and then reconnecting the HDMI plug to the computer. Why don't I always get display after completing step 5?

If it matters I run Ubuntu 11.04 64-bit on the computer.

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  • Would it not be simpler to leave both monitors permanently connected with mirrored displays and just switch off the one you aren't using?
    – Col
    Aug 12, 2011 at 11:14
  • @Col I think you misunderstood my question or I wasn't clear enough. I have only one monitor.
    – N.N.
    Aug 15, 2011 at 9:13
  • You're right, I thought you had 2 identical monitors.
    – Col
    Aug 15, 2011 at 11:24

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