HDMI -> Displayport problem

[cats_five]

I have a Dell monitor which has VGA, DVI & Displayport inputs. The DVI works fine using an HDMI->DVI cable from my PC or my (Dell!) laptop.

If I try an HDMI cable with a HDMI->DP adapter I get no joy at all, even if I manually select the DP.

Should this work? Obviously there is nothing wrong with the HDMI->DVI cable, or with the HDMI ports on the laptop or PC.

The adapter came from a well-known company, sadly the Dell monitor will be out of warrantee.

 

[cats_five]

Linking to the cable would break the forum rules and I'm pretty sure it's not an active adapter. It is a 'no brand' cable and I made the mistake of ordering in a hurry instead of waiting for my support ticket to be answered...

I have HDMI on the laptop and the PC, and DVI as well on the PC.

The Eizo (FlexScan S2242W-H) has DVI only, the Dell (UltraSharp U2412M) has DP & DVI (oh why couldn't it have had HDMI?). Of course both have VGA but obviously I don't want to go there.

If DVI to DP is any better I can switch the strategy - I know that HDMI to DVI works so the PC could do DVI to DP and HDMI to DVI, and the laptop could do HDMI to DVI.

 

[cats_five]

The PC should be connected to both screens. At present I'm using a DVI-DVI to one monitor which only has a DVI and a VGA, and an HDMI-DVI for the other which has DVI, DP & VGA.

I want to be able to connect my laptop to the second screen without unplugging the PC.

I don't want to use VGA.

 

[cats_five]

Got an email from a supplier, over £80 for the right adapter!!!!! (it's an active adapter, what I have must be a passive bit of cable with a plug on each end)

I think some sort of KVM that can switch DVI inputs might be a better - certainly cheaper - idea....

 

[cats_five]

The difference in sharpness is obvious editing text, which is what I wanted to use it for.

I should have got a non-APU CPU and a graphics card with DP as well as DVI, would have solved the problem. Too late now...