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I have an Acer Iconia tab w500 running Ubuntu 12.04 - The only output I have is an HDMI output so I bought an HDMI to VGA cable to connect it to my external monitor. It's not being detected by Ubuntu. Please let me know what other information you would like me to provide. Thank You!

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Is it just a cable, or is there some electronics/circuitry/chip in the cable (like ebay.com.au/itm/…) –  Portablejim Jun 12 '12 at 12:52
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Do you definitely mean HDMI? Sure you do, but as pl1nk says, HDMI can't be converted to VGA without clever electronics. Which made me think you might have DVI port because some of these support analogue and digital, and it's possible to get a straight forward connector for this. Using it gives me problems detecting resolutions but the display is detected. –  artfulrobot Jun 13 '12 at 9:36
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1 Answer

It will not work since HDMI is digital and doesn't support analog signals.

You could use an adapter.

There are two kinds of DVI signals

DVI-I, which has both analog and digital output, and
DVI-A which has only the analog output

So if you hook in the VGA → DVI cable, the signal will be analog on the DVI-end of the cable.

Since HDMI is digital, it doesn't support analog signals.

Extracted from here.

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Why does this cable exist then: amazon.com/Cable-Black-Video-Support-Necessary/dp/B002TUC64W/… So HDMI to DVI works though right? –  Sam Hakes Jun 13 '12 at 12:56
    
@SamHakes - If you read the comments you 'll see that it's not working. Check my updated answer. –  pl1nk Jun 13 '12 at 17:07
    
In fact from the product description it would seem that that cable works only one way, that is to say, VGA output port from video card -> HDMI input on screen; the first bullet point is "Your video card must support digital signal output through VGA port function". So if the cable used is an equivalent to this, it wouldn't work in Sam's case anyway (outputting via HDMI port to a VGA screen) –  Jez W May 24 '13 at 9:16
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