external monitor not showing full resolution

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Level 1

8 points

external monitor not showing full resolution

MBP 15 late 2011 running 10.10.5. Have seen threads similar to this earlier but with older/other systems. Have a brand new BenQ 27 inch that supports 2560 pixels, using HDMI input....cannot get the computer to give me that res. Have gone through every single monitor menu item. Did PRAM reset twice, tried all the plugging and unplugging tricks, did the Opt button with Scaling...no luck. Highest I can get is 1080P.

Anyone know of anything that will makes this work??

MacBook Pro (15-inch Glossy), OS X Yosemite (10.10.5), 8 gb ram, 500gig, FCP X, CS5

Posted on Jan 16, 2016 5:32 PM

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Answer 1

bulbenko Author

Level 1

8 points

Jan 16, 2016 5:45 PM in response to bulbenko

Okay....I have an update...it must be an EDID issue but how the heck do you fix that?

In System Info, under displays, it's showing the BenQ as only having 1920x1080, so it's not understanding the monitor correctly. Is this an Apple problem or the monitor maker's problem??

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Answer 2

Duane

Level 10

124,293 points

Jan 16, 2016 6:57 PM in response to bulbenko

Which exact model of Benq do you have? I did a search and every 27" Benq model that I looked at only supported 1920x1080.

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Answer 3

bulbenko Author

Level 1

8 points

Jan 17, 2016 7:00 AM in response to Duane

Duane,

only the BenQ models with IPS panel support more than 1920, and mine is the GW2765HT...most definitely 2560x1440 capable.

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Answer 4

bulbenko Author

Level 1

8 points

Jan 17, 2016 7:34 AM in response to bulbenko

Update of concern to all. Yes, I found similar threads saying that this issue started with Mavericks. So I just verified that indeed it's an OS X problem. APPLE are you reading this?? I expect you to contact me.

I took the backup drive to my son's MBP which happens to be on 10.6.8. and I booted my MBP from that. And yeah, it totally shows FULL res available from the 27 inch BenQ see attached screen grabs. Repeat original issue is under 10.10 all I can get is HD no matter what trick I try. APPLE FIX IT NOW!

Because the software I use won't run in older OS X and the computer hardware clearly is not at fault. You broke the software. I need a patch ASAP.

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Answer 5

Duane

Level 10

124,293 points

Jan 17, 2016 7:36 AM in response to bulbenko

This discussion area is in no way a direct path to provide feedback to Apple. If you want to let Apple know, visit http://www.apple.com/feedback/macosx.html

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Answer 6

bulbenko Author

Level 1

8 points

Jan 17, 2016 12:53 PM in response to bulbenko

To all having this problem...does your monitor have a DisplayPort input? Turns out that's the fix. I bought a $12 MiniDP to DisplayPort 1.2 cable and suddenly all resolutions available. And now supports 32 Bit color. Forget all software hacks and OS updates. Forget HDMI.

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