10-28-2011 08:49 AM - edited 10-28-2011 10:44 AM
I just got a brand new ZR2740W display wich have no OSD access. On my MacBook Air under the last Mac OSx Lion, i have only the choice between 800x600 and 1280x720
There is no mac driver on the delivered CD. And no "HP Display Assistant" too.
Please, how to get an higher resolution, or the full 2560 x 1440 pixels resolution?
Add : Tried on a N61J Asus laptop with Windows and a GT320M : Same problem. It seems that if 2560 x 1440 can't be accepted, the ZR2740W display can't take an intermediate resolution and falls until 1280x720 pixels resolution...
Trying now on a regular PC with an nvidia classic PCI card... and if it fail too, this beautiful display may return to the distributor...
10-31-2011 05:40 AM - edited 10-31-2011 05:42 AM
I don't have time for the moment, but now i think i know why i have this problem: In fact, when you want more than 1920x 1200 pixels on a display, you need to have a card able to manage and agregate 2 TDMS emitters, up to 330 MHz. Dual-link cards do this.
For example, i think that the Apple cinema display or thunderbolt display have this dual controler inside, and it runs fine on an apple MacBook Air.
So to have the HP display running on my MacBook Air, i think i need an intermediate box like sonnet having a dual-link graphic card inside. Searching...
10-31-2011 05:50 AM
Sonnet adapter box available in january 2012 : "http://www.sonnettech.com/product/thunderbolt/".
They says : Sonnet's Echo™ Express PCIe 2.0 Expansion Chassis with Thunderbolt™ Ports enable you to connect one high-performance PCI Express® 2.0 adapter card to any computer with a Thunderbolt port.
But if i add the HP display cost + This adapter cost (near 250$ ?) and the not too lazy graphic card (200$), it is like an Apple thunderbolt display cost. What is the advantage?
Note : Pay attention that this display dont have an OSD button, so you must use the HP soft to manage the display. The trick is that this soft runs only on Windows... Will HP code a macOSx tool?
11-15-2011 11:45 AM
I figured it out! (no thanks to HP support)
If you use a mini displayport to displayport cable, automatically more resolution options are given (up to full 2560 x 1140)!
You will NOT get these maximum resolution options using the included DVI cable.
11-28-2011 03:48 PM
If the DVI cable used is single-link, then yeah that will limit you. Would need dual-link DVI for larger pixel count.
12-05-2011 09:23 AM - edited 12-05-2011 09:25 AM
mini DP to DP: that worked - maybe in order to provide a product that is truly competitive with the Apple cinema display, HP SHOULD PROVIDE THIS $5 CABLE IN THE BOX. DVI does not do the trick.
12-05-2011 09:45 AM
You must be new to HP. They have a decades-long history of nickle&diming the customer, and a demonstrated contempt for Apple.
12-11-2011 03:11 PM
Ordered de miniDP to DP cable, thanks for your help, as it is written that DP drive this very high resolution as it does for a cinema display or a thunderbolt display.
Hi Anthony. HP build good products, as most of other brand. But for this display, no intermediate resolution and no OSD exist. This is a lack of work, but i think that this is the reason of the low price...
03-21-2012 04:16 PM
It would help if Apple didn't change their display adapters every year or two . . . do you really expect HP to put three additional cables in there just to keep up with Mini DisplayPort, Thunderbolt, etc? Sure, contempt for Apple is there (or just plain resentment,) but I think Apple owners can spring for the extra $6-$10 it costs them for a cable.
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