HP ZR2740w not displaying proper resolution

Question

HP ZR2740w not displaying proper resolution

I purchased the above monitor around a year ago and have beend using it with my circa 2007 powermac which has a NVIDIA GeForce 7300 GT card with 250mb of VRAM without difficulties at full resolution (2560 x1440). Well... I bought a 2012 mac mini (the latest) AND a brand new macbook air and using either the HDMI-DVI or the Displayport-DVI on the mini or the displayport to DVI on the macbook air the highest resolution I can get is 1280 x 720. When I go to monitor prefs there are only two options 1280 x 720 and 800 x 600. HP says it is not their monitor and I have discussed with Apple tech support and they are supposed to get back with me within 4 days. With them I reset the PRAM (or whatever its called nowadays). I find it interesting that this behavior is occuring with both the new Air and the mini. Any ideas?

BTW I have a 23" cinema display that is working fine with both. (1920x1200).

Thanks,

Posted on Jul 5, 2013 1:21 PM

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Answer 1

Linc Davis

Level 10

209,861 points

Jul 5, 2013 3:53 PM in response to Chris Williams Vanderbilt

See the last paragraph of this support article.

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Answer 2

BDAqua

Level 10

250,833 points

Jul 5, 2013 4:07 PM in response to Chris Williams Vanderbilt

Hello Chris,

Problem is the Mini HDMI port is limited to 1920*1200, And DVI needs Dual-link DVI...

Standard VRAM:

512 MB*

Maximum VRAM:

768 MB*

Display Support:

Dual Displays

Resolution Support:

1920x1200*

2nd Display Support:

Dual/Mirroring*

2nd Max. Resolution:

2560x1600*

Details:

*This model simultaneously supports 1920x1200 on an HDMI or a DVI display (using the included HDMI-to-DVI adapter) and 2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).

http://www.everymac.com/systems/apple/mac_mini/specs/mac-mini-core-i5-2.5-late-2 012-specs.html

http://www.bhphotovideo.com/bnh/controller/home?O=&sku=587729&Q=&is=REG&A=detail s

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Answer 3

Jul 5, 2013 4:11 PM in response to Linc Davis

Thanks. Doing that still reveals only low resolution options.

User uploaded file

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Answer 4

Jul 5, 2013 4:19 PM in response to BDAqua

Thanks. But I am condused. what is the point in selling a displayport to DVI adapter, if what one really needs is a displayport to dual-dvi adpater? From the table above they do not reference a dual dvi adapter, but rather the two adapters I already have.

Also, the resoultion I am getting is far below the ones indicated in this table (1280 x 720) I have tried both the hdmi-> DVI and the thunderbolt to->DVI (which should give me 2560 x 1600 according to the table above.).

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Answer 5

Linc Davis

Level 10

209,861 points

Jul 5, 2013 5:14 PM in response to Chris Williams Vanderbilt

Back up all data.

Triple-click the line below to select it, then copy the text to the Clipboard (command-C):

~/Library/Preferences/ByHost

In the Finder, select

Go ▹ Go to Folder...

from the menu bar. Paste into the box that opens (command-V), then press return. A folder should open. If it does, look for a file with a long name that begins "com.apple.preference.displays2". Move the file to the Desktop. Log out, log back in, and try again to set the display resolution.

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Answer 6

BDAqua

Level 10

250,833 points

Jul 6, 2013 10:22 AM in response to Chris Williams Vanderbilt

Sorry the Details do not mention Dual-link DVI, I didn't make them, yet if using DVI you do need Dual-link, TB or MDP port n a monitor would be straight through.

http://en.wikipedia.org/wiki/Digital_Visual_Interface#Single-link_DVI

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