Have you tried a new fresh install or safe boot? seems very strange it will do it. as far as I know and in my experience the monitors do what theyre intended and just work as any other display connected regardless of brand.
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2011 2.3GHz MBP display port/thunderbolt issue with external monitor
- Thread starter joecool99
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have not tried SAFE boot for OSX, but as reported, W7 is fine. it must be a driver SW issue in OSX. fresh install with time-machine recovery.
AMD Radeon HD 6750M:
Chipset Model: AMD Radeon HD 6750M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 1024 MB
Vendor: ATI (0x1002)
Device ID: 0x6741
Revision ID: 0x0000
ROM Revision: 113-C0170L-504
gMux Version: 1.9.23
EFI Driver Version: 01.00.504
Displays:
Color LCD:
Resolution: 1680 x 1050
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
DELL U2410:
Resolution: 1920 x 1200 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: C592M97xxxxx
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
the last TV - YES is suspicious.
Chipset Model: AMD Radeon HD 6750M
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 1024 MB
Vendor: ATI (0x1002)
Device ID: 0x6741
Revision ID: 0x0000
ROM Revision: 113-C0170L-504
gMux Version: 1.9.23
EFI Driver Version: 01.00.504
Displays:
Color LCD:
Resolution: 1680 x 1050
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
DELL U2410:
Resolution: 1920 x 1200 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: C592M97xxxxx
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
the last TV - YES is suspicious.
Dunno, I'm driving a 24" Samsung at 1080p with it and it's crystal clear. I suspect something incompatible, but not necessarily bad. If you want to drive an external by itself close the MBP lid. Just need an external keyboard/mouse.
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THats what i've been doing but the issue is still there. Support for the 24" LED ACD is definitely iffy and the laptop is to blame because every other computer i've tried with the display works.
agreed. it's 100% the MBP fault. Other systems, including older apple laptops do not have a problem with the same exact monitor.
See this thread for similar/same problem:
MacRumors Forums > Apple Hardware > Desktops > Mac mini > Getting the Dell u2211h to display properly on a 2010 Mac Mini
MacRumors Forums > Apple Hardware > Desktops > Mac mini > Getting the Dell u2211h to display properly on a 2010 Mac Mini
unfortunately, this trick with booting does not help. i tried it before as well as plug and unplug the DP cable.
the U2410 is 2009 REV. A00 - flashed to a newer firmware. still didn't help.
I am having this same issue. I just spoke to Apple and sent them some screen shots. I noticed the Display Preferences show 59.9 hz when connected through the Displayport cable. I think this means that the Mac thinks my U2410 is a TV when it's connected through mDP to DP cable.
I am using a mini Displayport to DVI adaptor in the mean time that works fine, BTW.
Thought I'd post these:
I am using a mini Displayport to DVI adaptor in the mean time that works fine, BTW.
Thought I'd post these:
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I am having this same issue. I just spoke to Apple and sent them some screen shots. I noticed the Display Preferences show 59.9 hz when connected through the Displayport cable. I think this means that the Mac thinks my U2410 is a TV when it's connected through mDP to DP cable.
I am using a mini Displayport to DVI adaptor in the mean time that works fine, BTW.
Thought I'd post these:
thank you for the pics. did apple responded yet ? I didn't test mDP to DVI myself.
again, the strange thing is that with exactly the same cable mDP -> DP it's crystal clear and as it should be in Windows 7 on the same laptop.
Yeah it's definitely something in software.
They're going to forward the information to engineering.
I am certain now that OSX is recognizing the U2410 as a TV (offered resolutions and overscan setting).
In the mean time, if I were you, I'd get a mini Displayport to DVI adaptor or cable. Works perfectly for me.
I'm using an Apple mini displayport -> DVI adapter on my 13" 2011 MBP and everything is working fine, monitor is quite old (Dell 2005FPW) so can't give a direct displayport cable a try.
yes, OSX thinks it's a TV.
from system:
DELL U2410:
Resolution: 1920 x 1200 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: C592M97U28UL
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
yes, OSX thinks it's a TV.
from system:
DELL U2410:
Resolution: 1920 x 1200 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: C592M97U28UL
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
I was really starting to like using the Displayport.
Same issue here. 2011 MBP connected to a Dell 24" with a mini display port to display port cable.
It seems to be detecting it as a TV and is offering the overscan adjustments. I have a DVI adapter I'll be trying.
Is there anyway to force the MBP to recognize it as a monitor?
It seems to be detecting it as a TV and is offering the overscan adjustments. I have a DVI adapter I'll be trying.
Is there anyway to force the MBP to recognize it as a monitor?
i looked, haven't found the answer - this has been reported to apple by numerous people and GPU fix update should address this.
Search Google for OSX font smoothing secondary monitor or something like that. You should eventually come across a post (or likely several) with a terminal command you can enter to fix the problem.
From what I understand OSX is mistakenly recognizing your non-Apple LCD as a CRT monitor and disabling font smoothing. Whether this is deliberate on Apple's part to promote Cinema Display sales or a legit bug is a question for the Apple Tax/conspiracy crowd, but this has been a problem since the release of Leopard.
From what I understand OSX is mistakenly recognizing your non-Apple LCD as a CRT monitor and disabling font smoothing. Whether this is deliberate on Apple's part to promote Cinema Display sales or a legit bug is a question for the Apple Tax/conspiracy crowd, but this has been a problem since the release of Leopard.
i tried, but didn't resolve the issue.
one example:
http://hints.macworld.com/article.php?story=20090828224632809
one example:
http://hints.macworld.com/article.php?story=20090828224632809
Same problem on MBP 2011 2.2 and MB Air 2.13
Hi, I am also experiencing this problem on both my new MBP 2.2 i7 and MB Air 2.13 that I bought 2 days ago. I am using a mDP-DP cable on an HP LP2475w that worked flawlessly with the older MBP's. Seems it is the newer models that have this problem.
I'll try the mDP->DVI and report back.
Hi, I am also experiencing this problem on both my new MBP 2.2 i7 and MB Air 2.13 that I bought 2 days ago. I am using a mDP-DP cable on an HP LP2475w that worked flawlessly with the older MBP's. Seems it is the newer models that have this problem.
I'll try the mDP->DVI and report back.
I know it's not exactly what ya'll are experiencing, but I was having similar problems with a Samsung Monitor on my new 2011 15". I was using a Dynex (bestbuy) miniDP to HDMI at first which wasn't working, and then a MiniDP to VGA adapter, which also didn't work on the Samsung. I looked on amazon and bought a new Kanex MiniDP to HDMI adapter and I haven't had a problem since.