DP output not recognized by Display

[DrOz]

I recently build a Pc and got a BenQ Xl2420Z and a gtx980 G1 gaming. I am using a display port cable to connect them together. it boots up fine and all is fine until I turn off the monitor while the pc is still on. The monitor does not recognize the output from the gpu and I have to replug the cable to get the screen to appear.

Any suggestions why this happens? 

[Muffinmaddness]

this if i remember was a bug with the drivers i'll check hang on =) 

[Aniallation]

I recently build a Pc and got a BenQ Xl2420Z and a gtx980 G1 gaming. I am using a display port cable to connect them together. it boots up fine and all is fine until I turn off the monitor while the pc is still on. The monitor does not recognize the output from the gpu and I have to replug the cable to get the screen to appear.

Any suggestions why this happens? 

Hmm... are latest drivers install for the card? Does the issue happen using DVI or HDMI?

[cesrai]

I would say install the display drivers and install the latest GPU drivers or reinstall them.

[Muffinmaddness]

read this article from NEC displays. It states the problem is due to some cable manufactures not adhering to DisplayPort wiring specifics. 



Certain Mini DisplayPort to DisplayPort cables available in the market do not adhere to the
DisplayPort design wiring specification. This incorrect design causes power-related issues with
the display and/or host computer.
The DisplayPort specification states that a display (known as a "sink" device) must output power
on its DisplayPort input connector. The specification also states that a graphics adapter (known
as a "source" device) must also output power on its DisplayPort output connector. The idea for
providing power on both the "source" and "sink" devices is that certain other devices connected
between the two can receive power. Such devices may be, for example, a repeater or a converter
of some sort.
When a cable is used to connect a display directly to a graphics adapter, the DisplayPort
specification states that the cable must not connect the power line, and the power outputs of the
two devices should not be connected together via the cable.
The cables that were manufactured incorrectly connect the power line through the cable and
allow the power outputs of the display and graphics adapter to be connected together - a
condition that is forbidden in the DisplayPort specification.
Because the two power sources are connected together when using one of these cables,
situations can arise in which one device is actually supplying power to the other. For example, if
the host computer is powered off but the display is on (or even in standby mode), the display will
inadvertently supply power to the host computer, which may cause problems such as not being
able to power on, enter sleep modes or resume correctly. Similarly, if the host computer is
powered on but the display is off, the computer will be supplying power to the display, which may
cause problems with the display powering on.
Macintosh and Mac are registered trademarks of Apple

Here's the read>> http://www.necdisplay.com/documents/...ort_Notice.pdf

 

 

 

found this and see if you can change your monitor to detection always active 

[DrOz]

read this article from NEC displays. It states the problem is due to some cable manufactures not adhering to DisplayPort wiring specifics. 

Certain Mini DisplayPort to DisplayPort cables available in the market do not adhere to the

DisplayPort design wiring specification. This incorrect design causes power-related issues with

the display and/or host computer.

The DisplayPort specification states that a display (known as a "sink" device) must output power

on its DisplayPort input connector. The specification also states that a graphics adapter (known

as a "source" device) must also output power on its DisplayPort output connector. The idea for

providing power on both the "source" and "sink" devices is that certain other devices connected

between the two can receive power. Such devices may be, for example, a repeater or a converter

of some sort.

When a cable is used to connect a display directly to a graphics adapter, the DisplayPort

specification states that the cable must not connect the power line, and the power outputs of the

two devices should not be connected together via the cable.

The cables that were manufactured incorrectly connect the power line through the cable and

allow the power outputs of the display and graphics adapter to be connected together - a

condition that is forbidden in the DisplayPort specification.

Because the two power sources are connected together when using one of these cables,

situations can arise in which one device is actually supplying power to the other. For example, if

the host computer is powered off but the display is on (or even in standby mode), the display will

inadvertently supply power to the host computer, which may cause problems such as not being

able to power on, enter sleep modes or resume correctly. Similarly, if the host computer is

powered on but the display is off, the computer will be supplying power to the display, which may

cause problems with the display powering on.

Macintosh and Mac are registered trademarks of Apple

Here's the read>> http://www.necdisplay.com/documents/...ort_Notice.pdf

 

 

 

found this and see if you can change your monitor to detection always active 

Yeah I got the GENERIC display port. Do you think that getting a new cable could fix the problem. I have the newest drivers etc

[Muffinmaddness]

Yeah I got the GENERIC display port. Do you think that getting a new cable could fix the problem. I have the newest drivers etc

check your monitor for power saving, and turn it off, or look for a setting that has detection always active and turn it on , before buying a new cable 

[DrOz]

check your monitor for power saving, and turn it off, or look for a setting that has detection always active and turn it on , before buying a new cable 

I just pluggied in a DVI-D cable and after I turned off the screen i went back on no problem

[Muffinmaddness]

I just pluggied in a DVI-D cable and after I turned off the screen i went back on no problem

but display port is not the same as DVI - so if you want to use DVI thats fine, but it wont help you trouble shoot the DP connection 

[DrOz]

but display port is not the same as DVI - so if you want to use DVI thats fine, but it wont help you trouble shoot the DP connection 

 

As I understand for DP to a monitor you need a male 20 pin to female 19 pin. 

[Muffinmaddness]

from what i understand yeah thats right