MBP TB 13" 30hz video out

[T-Bob]

Using HDMI to DVI on Multiport AV adapter. Wa surprised to see its only 30hz like the MacBook is unless you use the pixel clock patch. Any reason why its low?

 

[keviig]

What resolution?

 

[T-Bob]

What resolution?

Important omission there. It's at 2560 x 1440

 

[pshifrin]

Simple solution, use Display Port instead!

 

[keviig]

Important omission there. It's at 2560 x 1440

Not sure why then. I'm running 1440p 60hz via the Multiport AV to HDMI adapter without issues. Have you tried clicking "Scaled" while holding option?

 

[T-Bob]

Clicking scaled with option does present more resolutions, but the 30HZ is still greyed out.

 

[keviig]

Clicking scaled with option does present more resolutions, but the 30HZ is still greyed out.

Did you make sure your DVI cable is dual link? I think that's required for 1440p 60hz.

Edit: http://images.ncix.com/forumimages/6C145301-76F5-476C-ADDF0661CEC485F1.jpg
Ignore the "max resolution" table on the right. Just look at the connector and make sure it's Dual Link.

 

[T-Bob]

Cable gets 60 on other systems, and it's dual.

 

[keviig]

Cable gets 60 on other systems, and it's dual.

Very strange then... At that point i'd try other cables if that's an option!

 

[T-Bob]

Yeah just did. It's definitely the system.

 

[keviig]

Yeah just did. It's definitely the system.

I feel your struggle. I can't for the life of me get my MBP to scale my 1440p 25" Dell monitor to HiDPI. I've even gone so far as to edit system files, but nothing works... It's infuriating that something this simple (It's literally a 3 click operation in Windows and works flawlessly) is made so hard to do!