You have to know what you can expect.

You have to know what you can expect.

DELOCK Adapter DVI29 male to VGA female DVI29 + (accessory)

Customer Review

What this adapter may not? This adapter can not convert digital to analog signals. No simple adapter can. Products can such a thing are significantly more expensive and clearly recognizable as such.

What can this adapter? To understand this, one has to go back a little. There are basically 3 types of DVI outputs:

DVI-A: At such an output only an analog signal is present. A rather theoretical option that makes sense only in rare cases and therefore does not occur at usual consumer devices.

DVI-D: On such an output only a digital signal is present. However pure DVI-D outputs on graphics cards to my knowledge, are more exotic. A card with Radeon or NVidia should even if it was cheap not fall into this category.
However, where you can meet pure DVI-D outputs are digital screen switches (KVM switches). Even if you get the DVI output already has a different adapter (eg HDMI> DVI or display port> DVI), it can be assumed that only a digital signal.
If you have a PURE DVI-D output, helping a This adapter nothing. This is not a defect of the adapter. No deratiger adapter can convert from digital signals to analog.

DVI-I: analogue and digital broadcast signals to output as a CAN. DVI outputs directly to the graphics card (ie, not on a screen switch or another adapter) are usually fall into this category. In this case, the adapter passes the analog signals to the VGA port and both signals to the DVI connector on the thick end.

Why I write "Can analogue and digital broadcast signals"?
There are 3 options for what the graphics card can output to a DVI-I output:

1) The graphics card can output the same image at the same time analog and digital.

2) The graphics card can output 2 independent images simultaneously, an analog, another digital

3) The graphics card can be either an analog or a digital image output.

And as always, here also plays the video card drivers and the operating system involved. What concrete situation you are present, can be so try to test difficult without first.

For the purchase decision regarding. This adapter is only important to understand that the adapter on the site is innocent. No matter what the graphics card purely indicates its small end, he passes it on to the good 2 ports chump.
If no analog signal coming from the graphics card, then a monitor to the VGA port just stays black. Point.
If the graphics card can not output 2 independent pictures, then true two-screen operation is simply not possible. Point.

The following constellations I tested on the adapter:

Constellation 1: Two analog VGA monitors simultaneously, one of them an additional
DVI> VGA adapter, which I have put to the DVI connector on the thick end.
Both monitors always show in this case, the same picture.
Please note: The adapter does not contain an amplifier. In this constellation, so the VGA signal is easily split. How this affects the image quality and if at all it works depends on the hardware used. For me it has indeed funktionoert, but this is not an intended use of this adapter. Generally, the cascading of several Plug Adapter is always a gamble.
Another difficulty is that is unpredictable in this case, whether and which monitor via DDC is recognized by the graphics card. For me, none of the monitors was more identified with the result that the operating system has set too low a resolution (in my case Ubuntu).

Constellation 2: A digital DVI monitor and one analog VGA monitor simultaneously. This is the intended use of the adapter.
Please note: As mentioned above, it depends on the graphics card and the driver on whether you simultaneously both monitors and if so, whether they can operate with independent images, or only in Klonbetrieb.

My graphics card is only compatible with either digital or analog signals. What signals the driver automatically chooses are issued because he recognizes which monitor via DDC. I do not know if the adapter always guaranteed, but in my case always come with 2 monitors simultaneously connected only the DDC data of the analog monitor, ie the DVI cable connected monitor remains black. If, however, connected only a DVI cable, the DDC data of this monitor are transferred correctly.

Important for understanding's this situation it is to know that the graphics card on the monitor cable supplied the DDC circuit monitor with current. So it does not matter if the monitors are turned on or even have electricity. So you can not simply turn off a monitor (not a switched outlet) and expect then the other works.

A monitor cable may only be connected at (and you have the computer for security after repositioning restart) for a functional test of the adapter. In this test, if both outputs operate individually, the adapter properly. Him to exchange or buy a similar adapter from another brand then does nothing.

But there is a simple solution. As I said, always win in my case, the DDC data of the connected VGA monitor cable. I have now just pin 9 of the VGA cable briefly put into a tube of superglue (Then you have to wait a few hours until the glue is completely dry. Tests whether it is already dry, one should refrain to avoid damaging the adhesive layer). This gives this pin an insulating layer and has no more contact. Pin 9 is responsible for the power supply of the DDC the monitor is off. The result of this simple operation is that the DDC of the connected this prepared VGA cable monitor only then gets power, if the monitor power has (My monitor has a hard off. As the standby mode to diesbzgl. Behaves, I can not . When in doubt, saying one should use a switched outlet.). This I reach my desired behavior. If the analog monitor is off, the monitor is DDC detected on DVI cable and displays the image. However, if the monitor is on the VGA cable, win his DDC data and it displays the image.

The simultaneous operation of both monitors is not possible here. That's not the fault of the adapter but my graphics card (or graphics card driver). In my case, I do not need both. But who needs it would in this case probably to replace the graphics card.

The plus side of the adapter: The packaging can be destructive and easily open by pushing the Papprücken from the plastic. You can easily return the adapter so if you realize when trying out that it does not help one.

Good and attentive service Rank: 5/5
December 25
A DAC will to basics Rank: 5/5
June 3
Mixed 40 Rank: 3/5
April 5
Very good utensil Rank: 4/5
May 23

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