External Display is incorrectly recognized as a TV.

Hi there. My MBA 2011 (Lion) is connected to ASUS VG236H with a MiniDP-HDMI cable. However I don't see the native resolution (1920*1080) or refresh rate (120Hz) available in the display setting. Instead I have to use 1080p and 60Hz which make the everything looks blurry on the screen. In System Information the external display is recognized as a TV whereas in fact it isn't.
Is there a way to solve this problem? Thank you all guys.

It seems to be growing every time I plug in my external monitor. Now I have 4 desktops.
I am also using FCPX with this set up. Maybe this is causing the problem?
Help!

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Installed Boot Camp; my external display isn't recognized upon boot in2 OSX

Man... Apple should really allow more characters in the Subject line. Here's a fuller subject:
"I installed Boot Camp and now my external display isn't recognized and receives no video upon booting into OSX (10.5.8)"
Unplugging and replugging the monitor resolves the issue until the next reboot. Had no issues prior to the installation of Boot Camp. (Windows 7 works really well, btw. I've had no issues there amazingly).
Has anybody seen this before and could point me towards the light? Thanks in advance,
Dave

I'd just like to add that this no longer works with OS X Lion 10.3.8 either... Get your **** together Apple. It's called MacBook "Pro" for a reason.

Incorrect resolutions for 16:10 external displays, unable to detect 16:9

Hey there all, this is my first post here. It looks like some people have had similar issues—particularly with an incomplete/incorrect list of resolutions being provided for external displays.
I am shopping around for an external display for my MacBook (my specs are included) and I tested a few different ones today, but encountered problems.
- On a 22" ASUS monitor (sorry I don't have the model) using Mini-DVI to VGA, the native resolution (I assume 1680x1050) is not available, and most resolutions offered are 4:3 ratio (1600x1200 worked). The highest widescreen resolution listed was 1280x768.
- Next I tried a 19" ASUS, this time 16:9, but the monitor would not display at all. The MacBook display would go blue as normal but then flicker, as if it could not detect the display. This also happened with a 24" BENQ monitor (also 16:9).
Wondering whether or not this was a problem with using VGA, I then bought a Mini-DVI to DVI adapter and tried again on the 19" and 24" (the 22" ASUS did not have a DVI-in) but the same flickering blue screen appeared, with nothing displayed on the monitor.
These were my thoughts:
1. My firmware is not up-to-date. I check in System Profiler and am running Boot ROM Version MB41.00C1.B00 and SMC Version (system): 1.31f0. These are definitely up-to-date for my model MacBook.
2. Drivers are out of date. This does not seem likely as I am running OS X 10.5.7.
Other than that, I am at a loss! I haven't yet forked out the $49 to do phone support with Apple, that will be my next bet.
Has anyone had this problem, or have any ideas what I can try? Short of buying a new Unibody MacBook of course .
Thanks guys, hope you can help. Just let me know if you need more info about my computer.

It's unusual to strike out like that with three different monitors using two different adapters. On the other hand, with all the video issues that have been reported by others on these forums since the 10.5.7 update, it's not too surprising.
Is a 10.5.6 downgrade a possibility for you? For example, do you use Time Machine and can you in that case revert to a previous time when the MB was running 10.5.6? Perhaps that's not a great suggestion, but it would be something to try.
There is some remote chance, though somewhat unlikely given that three different monitors are involved, that the embedded display driver data (EDID) in each monitor is bad or incomplete. If you care to investigate that possibility, there is a program called SwitchRes X that allows you to snoop a monitor's EDID and turns it into a human readable text file.
One final suggestion would be to try yet one more monitor to see if any monitor can return a good result. One obvious choice would be an Apple monitor. If there is trouble when trying to connect to an Apple monitor, then that would certainly point to some problem in the MB's configuration or hardware. And not to cast aspersions on the brands you have already tried, but try another brand (if not Apple) that is perhaps more mainstream and known to be more Mac compatible and less firmly in the PC camp where plug-and-display drivers have never mattered very much and are very often botched by the monitor makers. Dell, Samsung and LG are three big brands that come to mind. Good luck.

External display recognized but not working?

So, I've got kind of a weird problem.
Whenever I connect my iMac (through the Thunderbolt port) to my 32" RCA HDTV via a displayport to HDMI adapter, it shows on my iMac that there is a display connected (TTE HDTV), but my TV isn't recognizing it. I have tested the port/TV using my Windows laptop with a (native) HDMI port and there have been no problems.
I would think it was the cord I bought, except that my iMac recognizes an external display. It doesn't seem to be the TV's fault, and I've tried every resolution setting.

Yeah I have been having the same problem. When I'm looking at the Display Settings, it comes up with Samsung 1080 when its connected, however the tv doesnt recognize it. And if i unplug the HDMI cable from the adapter, the Tv options go away. There must be some sort of TV setting maybe? I am also using a passive adapter.

Mbp not recognizing external display

I have a 2010 MBP 2.8 and I'm trying to connect to a 24" Samsung LCD display to use as a 2nd monitor.   I'm using the mini display to DVI. And plugging a DVI to HDMI cord to that.
When I plug it into the tv and computer. The screen on computer flashes blue a couple times then nothing happens.   The computer is not recognizing the display.    I'm running Mountian Lion obviously and theres no option in "Displays" in preferences.
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Hey all, did a software update on my partner's mbp yesterday (10.5.8, security update 2009-006) and had the same thing happen where our external viewsonic display was no longer being detected. Plugging the cable in and out of the mini display port had the same effect already mentioned here where the mbp screen flashed blue like it was about to recognise the external display, but then nothing. Selecting detect displays from display preferences also had no effect. Tried resetting the PRAM and also the PMU, still nothing. So I shut down the mbp; disconnected the mini display cable; then turned off the viewsonic monitor at the power outlet and left it off for 10-20 seconds. Then I turned the viewsonic's power outlet back on, started up the mbp, turned the monitor on and plugged the mini display port cable in and the external display was back and working properly. Have shut down/restarted numerous times since then and it's all still working normally. Not quite sure how/why this busted in the first place, or why turning the viewsonic off at the power outlet seems to have fixed it, but it might be worth a shot for those experiencing similar problems... and it sure beats having to install/reinstall a different os version (which was going to be my next option)!

External display no longer being recognized ideapad u310 touch with Win 8.1

Several weeks ago I was able to attach a external monitor with a HDMI to DVI cable and it has been running without any problems until today when I turned on the laptop and nothing came up on the external display. Control panel only shows one display and will not detect the second display. Restarting has not help. No new programs have been added and nothing has been moved. I tried attaching a different external monitor and once again it could not be detected. Where do I go from here?

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Incorrect resolution displayed on mavericks external display 1080p

hi. i am running mavericks on imac (intel, amd radeon HD6970 1024mb) and have just added an external display (asus VN279) which i've tried connecting through both mini displayport to displayport and then mini displayport to hdmi. when i select the resolution i have an option for 1080p which is the native resolution of the monitor (and the one that i want to run), however, the resolution that actually comes on the screen is terrible and a totally different and lower one. any ideas on what could be wrong?
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bruno

Hi,
Try to change the HDMI cable. I did display (X1 Carbon 20A7) 4K (3840 x 2160) on TCL (U49S7606DS) using very old but original Panasonic Viera HDMI 1.3a cable. I know it is strange and should not work but it works.
BTW: Here is what Lenovo officially says for the second generation of X1:
Graphics Intel HD Graphics 4400 or 5000 in processor,
external digital monitor support via Mini DisplayPort or HDMI (supports VGA analog monitor via Mini DisplayPort to VGA Monitor Cable); supports three independent displays;
Max external resolution:
3840x2160 (Mini DisplayPort)@30Hz;
2880x1620 (HDMI)@60Hz
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a

MacBook Pro not automatically recognizing external display

I have an ACER 2216W LCD display connected to MacBook Pro with DVI cable. When I first plugged the ACER display into MacBook Pro, the ACER started right up -- nice plug and play. I disconnected DVI to bring MacBook Pro to school, and when I reconnected it at home, I received a "NO SIGNAL" error message on the Acer. I sent the Acer to their tech support in Texas after receiving no support from Apple (in Canada) and it tested fine on their PC. (They do not support Mac). When I attach the display, or turn it on, MacBook Pro screen goes blue and comes back quickly, as if it is trying to id the display. When I push "Detect Displays," I get nothing. System Profiler is not showing an external display. Any ideas -- is there a start up command I can try? Thank you! My Photoshop homework is building up.

MacBook Pro forum:
http://discussions.apple.com/category.jspa?categoryID=190
Probably more people there would know the ins and outs of what you are trying to do.

PB incorrectly identifies external display?

Hi everyone!
I recently purchased a Sceptre X22WG-1080p monitor for my PowerBook G4 (17", 1.67ghz), having enjoyed using a similar Sceptre display with my work MBP. However, I've just had a nightmare of a time trying to get this to display properly on my G4.
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Sceptre tech support, of course, has relatively no idea what a Mac is, though Macs are listed as being supported by the hardware. The tech guy told me to adjust the scaling on my video card (in this case, ATI radeon 9700) to "full screen", but as far as I know there isn't a way to do that in OSX. I've played around with DisplayConfigX, but can't make head nor tail of what I can do to fix this. Anyone have any thoughts? Drivers? I have a hunch that if I can just get the PB to call the monitor by it's true name that this will work itself out. But how?
Thanks so much for your help and time!
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http://www.info.apple.com/kbnum/n88064

W520 External Display Incorrect Size/Ratio

Hi,
I have recently ran into problems with my W520 w/ Nvidia 2000m when connecting to an ViewSonic 1920*1080 external display. I just want to clarify that I have been using this setup for about 2 month with a HDMI to Displayport connector and it have worked fine.
Yesterday. I plugged in my Displayport connector before I started the computer. Usually, I start then plug in once startup is complete. After doing so, the computer started up thinking my external is the main startup display. After startup, the proportion of the display is totaly wrong. I checked my resolution, it still says 1920*1080 but it seems that my thinkpad believes that the display's ratio is maybe 4:3 or 1:1 instead of 16:9. So, basically, everything on my external is elongated so I cant see the top or bottom of my desktop. It is like my graphics card think my external display is bigger than it really is.
I have tried to use Nvidia resize calibration, but it actually take away pixels from 1080 down to 810. I have also deleted by nvidia drive and reinstalled with no promise.
Any input is always appreciated and thanks in advance!

hey dy58,
could you uninstall all graphic drivers. let windows install its generic drivers.
with the generic drivers install, try again your setup and see if the aspect ratio is proper.
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How do i use an external display with my macbook pro?

How do I use an external display with a macbook pro?

Just buy the proper adapter cord, such as MiniDisplay port to HDMI for example. Plug it in and it will be automatically recognized. Use System Preferences > Displays to set options.
The display can Mirror your primary desktop or Extend the Desktop.
Regards,
Captfred

External Display (Mini Displayport) doesn't work

I have a mid-2010 13" MacBook Pro. The Mini DisplayPort sends NO signal to an external display, either adapted to VGA, DVI, or HDMI.
I've tried two separate displays (neither Apple branded), one of which is brand new, and both work perfectly well with my iMac and Mac Mini . . . but, nadda with my MacBook Pro.
I brought it in to the Apple Store in Belfast last week and the Genius Bar did the normal testing on it ... where it failed when hooked-up to a basic VGA LCD screen.
... BUT ... when they connected it to an Apple branded display it worked immediately.
Well, that's SOMEWHAT good news ... however, I have no intention of buying an Apple display (uhh ... yet).
I've scoured the newsgroups and discussions for an answer, but all the answers I found didn't help me.
Yep, it WORKS when connected to an Apple display, but that's it. And, the cabling and displays I'm using work fine connected to my other Macs.
"Detect Display" (holding down the ALT key to make it appear) does nothing for me.
I've tried Safe Mode boot ... no help.
I've tried with and without mains power (to the MacBook), and the results are the same both ways.
I've tried resetting the PRAM ... no help.
The fella at the Apple Store was stumped. They are willing to examine the machine and let me know what they find, but, this is my primary working machine and I don't have the luxury of such down-time without it.
Any thoughts? Any obvious (or, not-so-obvious) tricks you can finally think of? (short of buying an Apple display)
Thanks
Allan Shearer
Ireland

I knew that, Jin Li Thanks for the pic.
The question is whether hellothere's machine has thunderbolt. If my theory is right, then switching tb off might not help, since the problem would be with one of the video components (in the TV or the computer) not recognizing the other as a trusted make/model.

How do I set MacBook to an external display when the plug and play doesn't recognize it? I am trying to set my Samsung 530 LCD as a monitor but HDMI and VGA cords (and the adaptor for them) doesn't seem to work.

I have tried everything I can find on line but they all claim that the plug and play works, and they don't for me. I tried the mini dvi to HDMI and a HDMI cord and that was not recognized no matter which unit I rebooted first. I found someone who said that my Macbook might be too old for the HDMI technology so I returned the cords and went to the VGA cord and adaptor.
I tried this first with the HDMI setup:
http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx= 167919&modelname=LN40C650L1F&modelcode=&session_id=NDhJrD0DQT0Z8KRsm62yhxJxqnyPy SKhlhpB8vQ6h9Q7R2BZJGzj!-1089109758!1761676444!7501!-1!434477884!1761676348!7501 !-1!1292098185857
Then I tried this with the VGA setup:
http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx= 167901&modelname=LN40C650L1F&modelcode=&session_id=NDhJrD0DQT0Z8KRsm62yhxJxqnyPy SKhlhpB8vQ6h9Q7R2BZJGzj!-1089109758!1761676444!7501!-1!434477884!1761676348!7501 !-1!1292098185857
I contacted Samsung support and they said I needed to set the display settings to external display on the mac. I went to the display settings and moved the icon to my status bar. When I click on search for displays or whatever it says (I'm not at my Mac right now) it does nothing.
What am I missing?

I am using MAC OSx 10.5.8 (9L31a) as my operation system. The TV says "No signal. Check connected device's power, cable connection and source selection." Seems to me that that goes in hand with what the Samsung tech said about the Mac needing to be forces to use the external display. But how do I do that?

Intel iMac won't recognize external display with Dynex mini-DVI adapter

I've got an original Intel iMac with a Mini-DVI connection on the back. I'm attempting to hook it up to an external display (a plasma screen, in fact). I picked up a Dynex Mini DVI to Video Adapter DX-AP100 for Apple. This connector has a mini-DVI connector on one end, and both a video-out and an S-video-out on the other.
When attempting to use the adapter, the iMac does not recognize that there is an external display connected. Here are the facts:
The external display: I've tried this with a Panasonic Plasma screen connected directly through S-video, as well as a Pioneer receiver (one that switches video) connected both through s-video and composite video. And yes, I've got the settings on the TV correct. I've also tried this with a Polaroid LCD TV connected via S-video and composite video.
I did notice that when I click "Detect Displays" while the Plasma was connected, the plasma briefly "flashed", implying SOMETHING was happening, but still no dice.
Anyone have any experience with this Dynex DX-AP100 that could share some wisdom?
OS: v10.5.6
System Profiler:
ATI Radeon X1600:
Chipset Model: ATY,RadeonX1600
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 128 MB
Vendor: ATI (0x1002)
Device ID: 0x71c5
Revision ID: 0x0000
EFI Driver Version: 01.00.068
Displays:
iMac:
Resolution: 1440 x 900
Depth: 32-bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Built-In: Yes
Display Connector:
Status: No display connected

Yeah, I realize S-video is limiting, but I'm trying to keep things as simple as possible. The TV is mounted to the wall and there are not currently any DVI or HDMI cables coming out of it. There's an S-video input from my receiver that I'd prefer to use since it's readily accessible already. In the end my goal is to use Netflix "Watch Now" on the TV, so I'm not too worried about video quality.
and before someone asks if I considered that the receiver's S-video input might be the problem...I tried taking the s-video wire from the stereo and plugging it directly into the adapter. No dice.
ONE ADDITIONAL PIECE of information...while trying to get this to work on an LCD monitor, I plugged the composite video connection from the TV into the adapter. Suddenly the Mac recognized an additional monitor, but it saw it as a VGA monitor, not as s-video or composite video, and no signal went to the TV.
I'm considering trading in this adapter for a mini-DVI to VGA adapter, but that really won't help me with the connection to the TV.

MBPro won't detect external display on DVI

Hi Folks,
I have a strange problem that gives me quite some headache:
Is use a MacBook Pro 3,1 2.2 Ghz, 4GB RAM, 128MB NVidia something together with a Samsung SyncMaster 215TW.
For the past year I was using my external screen without any trouble, connecting it via DVI to the mac. Every night I turn down the lid putting the notebook in sleep mode and switch off the monitor. Exactly as I did yesterday. But this morning however the external display didn't wake up as usual it did just nothing - was not even detected via the detect display function. And this is still the case right now.
So when I plug (or unplug) the DVI to the external something is still going on. I get the blue screen (don't get that wrong that used to appear just before it would expand the desktop to the external screen, but then it switches back as if there would be nothing connected.
No relevant entries in any logfile. System Profiler shows "Status: No display connected". The display itself says some no connection message if unplugged and - get this - falls to sleep mode right after I plugin the dvi connector to the mac.
I tried all this:
-reboot (with display connected & without display connected and all other imaginable combinations) - no positive result
-the display via DVI-VGA adapter works (but the image is not as nice unfortunately)
-reset PRAM (boot with optioncommand+PR)
-reset the entire thing (no power, no battery and hold the powerkey for 10 secs.) nothing
-connect some other external display to the mac via DVI - works perfectly
-connect the display via DVI to an other macbook pro computer - works perfectly too
-hard reset the display via the (red) support menu - no result
-an other DVI cable - no result
-booted from the leopard install cd - same thing
-booted from an other harddisk with 10.4.10 (removing the internal disk)- same strange behaviour with the old system
-booted ubuntu linux 8.04 - even here the same problem X doesn't recognize the external display if it is attached to the DVI port also no entries to the logs here.
-SwitchResX and tried to reset the display setting from there (vendor id 4c2d & product id 213 & 214) but still no success.
- called the apple support and my distributer of trust - no ideas but could be a hardware fault (mmh ok... but why do all other display I tried work perfectly with that beast of macbook pro but not any SyncMaster 215TW?!? that worked great for the whole last year)
I guess the macbook had a very bad dream that very last night about mac eating foo-bars that crawl through DVI cables from any 215TW display.
As for now I have a date with the local apple service partner -- in three weeks (it's holiday time in g.o. germany). Don't know what to tell him: Probably I'll need to go there with the screen to show them the entire scenario. Hopefully they (still) think it's a problem with faulty apple hardware (or system software) and replace the logic board.
But I'm still in hope! Is there anybody out there having an idea with what I could try next to bring back the love between my macbook and the lovely 215TW display?
greetings,
brutus banane

I have recently bough a new Macbook Pro 15.4", it worked first time with a Samsung Syncmaster 2493HM but after a few days the 'detect display' utility ceased to connect, then a short while after on start up I was getting a blank screen with a flashing folder with '?' on it, preventing me from booting up successfully.
I tried the reset p-ram, didn't work then I tried an archive install of OSX and that ironed out all the creases - for a day, there has been no flashing folders on start up but the Samsung has failed to be detected and this morning wouldn't work no matter how many restarts or cable disconnecting attempts.
So I called Apple helpline, told the guy what had happened, he mentioned to try the install discs again with the display connected to see of the MBP sent a signal to it, after choosing the language in the OSX installer, the display was once again recognized! I didn't have to proceed any further with the install discs so quit, reset and ejected the install discs and all seems well again.
For how long i wonder?
I have no idea of this will work for anyone else but it works for me at the moment.
Interested to see when and how this finally gets solved!
T.
Message was edited by: Tyke Tyler
Message was edited by: Tyke Tyler

External Display is incorrectly recognized as a TV.

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