Output to display port Problems

Hi,
I have a X220 Tablet with a HP L2045w Monitor connected (Win 7/64).
Usually I connected the Monitor via Display port (with a Display port to Single DVI Adapter) which worked properly.
For a short while I needed the Display Port Adapter on aanother PC. So I switched the connection to VGA.
Now I got the Display Port adapter back and connected the Monitor again with the DVI, but the Monitor kept blank no matter what I tried. Checked Monitor settings and BIOS settings.
So I downloaded the newest video driver for my notebook and installed it. During installation the monitor suddenly startet to work. FN + F7 worked properly. After installation I was asked to restart the computer. After restart same problem again. Display stayed dark.
I can reaproduce this. Installing the display driver resolves the problem untill the next restart.
After the driver installation the HP L2045w is recognized in the resolution settings. After the restart I only see a VGA monitor as a choice.
If I connect a HP L1925 monitor to the Display port it works properly.
Any ideas?
Thanks

Hi there MSPoettl,
I updated to the new firmware for the 24' when it was released. This largely fixed the problem, although the Lacie's fan makes a very airy noise as it blows. The image on the 24' led apple careen is stable, so good news there. However when plugging the MBair into the Lacie and then into a 27' iMac I still get occasional distortion.
Good luck.
David

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Thanks in advance.

Have you tried a different adapter/cable? This is where I would start. (see if you can borrow some).
You can also try these resets:
NVRAM/PRAM:
http://support.apple.com/kb/HT1379
SMC:
http://support.apple.com/kb/HT3964
These are start points, gotta start somewhere, right?

Mini Display to Display Port Problem

Ok so I have the mini display output in my MacBook pro and currently I just use a VGA adaptor but I presume this won't yield best results. So since my HP HD monitor has a Display Port I thought the best idea was to get a mini display to display port cable.
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Hello,
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Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there, some things will change it for their own use, then not set it back.

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Dear John,
thank you very much for your quickly answer.
But now, please, could you say me which is the exactly adapter that I need for to can connect a VGA monitor with the Thunderbolt port ?
There are many models but any specify about the Thunderbolt connection.
Kind regards,
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Bump?

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Hi there Ledd29,
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I have a T430s connected to a Lenovo mini dock station running Windows 7. I have just purchased a 27" monitor which supports up to 2560x1440 resolution. When connect to the monitor using a display port to DVI cable Windows will only allow a maximum resolution of 1680 X 1050. However, if I connect via the VGA adapter I can achieve 2440 X 1440 resolution. Why would this be so?
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Hi there; Why is so much crap posted here, is someone here interestet to lie about Lenovo Products, to make them look better? Or is the level too low....
I have å Lenovo T430s produced late 2012, most expencive Version, type 2356LPG. Intel Graphics 4000. I have three 27" monitors. One so called Display port or Mini Display port or whatever the different makers calls it (!!).
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Either way - This is crap! What shall the customer do?!! Try out all the 10'000 adapters on the marked, to find one that Works?! If it will ever work, without a docking..... I have been trying to find information on the mini-display port from Lenovo. I find this forum, with incompetence, but no information.
With so many 27" monitors comming on the marked, all with more or less the same input plugs, why the heck are the produsers of the PC's so far behind!?? Not even information....no adaptors following the Product..... I also have Asus and Samsung PC's - all With different plugs.... Shall I shop an arsenal of adaptors.............?!?! And hope the best cause noone knows if it will work......... IS IT 2013 ALSO IN CHINA??
This is just to bad, chinaman!
spoilers removed

Mini display port to DVI problems

Hello community,
I have a question regarding the connection from an iMac via the mini display port to a DVI input at a TFT monitor. I have an older TFT monitor and now I connected the iMac with this monitor via mini display port -> DVI adapter -> DVI cable -> monitor.
It is quite a simple connection, but actually when I force Mac OSX to detect external monitors it does not react at all. Mac OSX behaves as if there is no connection to an external monitor.
I already told this to my reseller and they told me that the adapter is not working correctly and they gave me another one. With that one I have exactly the same problem and now I'm quite sure, that it is not a problem of the adapter, but somehow my iMac does not find the external monitor.
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HP probook 6450b running windows 8 display port to HDMI doesn't give any output

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Dear Customer,
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are using the Display Port on the Notebook get HDMI Ouput for better Audio and Video
We will surely assist you with this issue
Firstly I would like to keep you informed that the Display Port supports resolutions up to 2560 x 1600, 30-bit color depth at 60 Hz, and full HD (1920 x 1080) monitors, 24-bit color depth at 120 Hz
NOTE: Resolutions are dependent upon monitor capability, and resolution and color depth settings.
Please use an HP DisplayPort to HDMI Adapter for this setup. Please make sure that you are using HP Cable/Converter with the Product Number BP937AA.
1. Please let me know if you have additional graphics card installed on your Notebook
2. You can try download and installing the latest BIOS Update for your Notebook from the HP Website
3. Make sure VGA Port on the Notebook is not in use when you are testing the Display Port
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the KUDOS star on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
Although I am an HP employee, I am speaking for myself and not for HP

Mini Display Port to HDMI sound problem

I have an iMac 11, 2 (MacOS X, 10.6.8). The Mini Display Port is supposed to be able to carry sound, (using a Monoprice Mini DisplayPort to HDMI Converter with Audio, and HDMI cord supporting 3D, and Audio Return.) I am playing downloaded movies with VLC, which works fine on the computer. When I try to burn DVD disc using Toast Titanium, I get video, but no sound. So, I figure I can watch movies on my Vizio 42" TV screen with the MiniDisplayPort to HDMI cord. I learned that to use the MiniDisplayPort I have to go to click the box for Mirror Display. In System Preferences--- Sound---- Output Tab, the only two choices are: Headphones...... Headphone Port, and E3D420VX....... HDMI, neither of which seem to help "push" sound through the MiniDisplayPort.
So, I give up and watch the movie on the Vizio screen (through the HDMI cord), while listening to sound on the little computer speakers. After watching a couple of movies, and then not doing anything for a few minutes, all of a sudden the movie starts replaying off the play list, and lo and behold..... sound coming through the TV speaker system!!! (So, I know the HDMI cable is capable of carrying audio.)
If any one can help me figure out how to get sound through the HDMI cord all the time, it would be greatly appreciated!

Hello,
Long shot, but...
Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there, some things will change it for their own use, then not set it back.

Mini display port to HDMI problem...still happening, apple needs to help!

i read a lot about this topic and the question was marked answered, but there was no answer, sooo...
this is just a heads up to apple that this problem still exists and many people are still having it! Please do something... you put this mini display port on your computers... sold them to us... and now dont have software that lets it work... loosing a lil faith in apple today! there were 11 pages on this that i saw, i think it deserves a firmware update!
this next part is a direct copy of a post by sanktcolon and he explained the problem very well, so if your interested...
I figured I would just tell you all about my story. I do not have any solutions, the problem is still ongoing. But first I'd like to clear some confusion.
There seem to be a couple of people in this thread who thinks that when you experience this problem and you plug the HDTV with your MacBook through HDMI, you get a connection with the HDTV and can change the settings. This is not true. What happens is that the MacBook will flash its screen like it does when it detects a TV being connected, but then it will go back to normal. No connection established. Of course, there's people in this thread with different kinds of problems but with similarities. However, the main problem in this thread is quite clear and it's the same one that I have.
So with that out of the way, here's what happens for me and most people in this thread:
I've been using a Mini Display Port to HDMI adapter for quite a while and it has been working great. But lately I've been experiencing issues with it. There is nothing wrong with the adapter nor the cable, and certainly not the TV.
When I connect the adapter to the computer, the screen on the MacBook will flash blue, like it should, but it will not connect to the TV. What does this mean? It means that it detects the TV but is unable to establish a connection with it. Probably because it sends the wrong signals.
Now that's all pretty logical, but here comes the weird stuff. If I continue to try and re-establish a connection, either by plugging in and out the cable or changing HDMI-ports with the TV-remote (the MacBook re-detects when I switch from HDMI1 to HDMI2 and back), it will eventually establish a connection with the TV and work fine. Though, this can take minutes. Plenty of minutes. Last night I tried re-detecting for about 15 minutes and it didn't work. However, this morning it worked quite quickly.
So the problem is quite obviously with the MacBook/the OS and not with the adapter, cable or the TV. It's just ridiculous, and frankly quite annoying, to read posts where people claim you should get a new adapter. Why? Because there's so many people out there with different adapters, and people who have switched adapters and so on and so forth, that experience the exact problem I just describe. So either there's a problem with the MacBook/OS or there's a lot of TVs and adapters out there that are faulty. It's just illogical.
Once again I would like to remind you all that there's no connection, what so ever, between the TV and the MacBook when it doesn't establish one. And by establish I mean that you can actually see the screen on the TV. So bringing up the display settings won't do anything, search for devices on the TV or in the MacBook won't do anything. There just is not a TV there for the MacBook.
I have tried everything posted in this thread and the only thing that works for me is trying over, and over, and over, and over again until it just randomly works.

I too am having this same problem with my Macbook Air (Late 2010 Edition). I think this has something to do with OSX 10.6.6. Before the update, my mini display to HDMI was working flawlessly. Now, when I try to plug in to the TV my macbook just flashes the blue screen with no picture going to the TV what so ever. I'm not sure what was done with the update, but i'd sure like to be able to connect this machine to the TV again! APPLE, HEAR OUR VOICES! Fix this problem!

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