My rMBP HDMI display cuts out once per session

I have a rMBP (15 inch) that I use mostly with the lid closed and connected to dual monitors, (both identical ASUS monitors with HDMI and DVI-D connections). I use the Thunderbolt DVI-D adapter and a HDMI cable. When either running Windows 7 via Bootcamp or using Mountain Lion, the HDMI connection goes dark for about 3-5 seconds when I first start using the computer, then the picture reappears. The DVI-D connection is not affected.
All software updates are current and I've switched monitors and cables to no avail. Has anyone else encountered this issue?

Thanks. We are using the same setup the salesman sad he had at home: Mac Mini as media server with TV as monitor. We bought the server, not for the services, rather for the two 500GB drives. We let the default services run when we first set it up. I suppose I could shut everything non-essential down and see what happens.
I finally isolated the problem to today to either the HDMI cable, the miniDVI-to-HDMI adapter, or the Mac Mini itself. I would love for it to be just the adapter. Funny thing is the guy who sold us the system didn't know an adapter came with it so he sold us another one--which we promptly took back. Blergh!
This was supposed to be an easy migration. Imagine the naivete!
-starkravingchad

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13" 2012 Non-Retina display cuts out

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What is the issue causing this? I'm pulling my hair out at this moment

If I were you, I would take the machine into your local Apple Store and compare it with similar models on display. My late 2011 15" has a bright, vibrant screen and so should your new 13".
If you see that your display is simply not up to par, exchange your computer for another - you have 14 days from date of purchase to exchange or return for a full refund.
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HDMI output cuts out and then comes back, any ideas?

Hi all.
I have a two Dell U2412Ms connected to my MacBook Pro Retina. One is connected via a Displayport connection and the other via the HDMI. I used to have them both connected to the Displayport conenctors but have recently run a cable into my office and now have the ethernet dongle connected to one of the Thunderbolt ports.
Since connecting a screen to the HDMI port, I've noticed that it does something odd from time to time. The screen connected to the HDMI port will go off for a couple of seconds, and then come back on again. It tends to only do this once per 'session' of me using the system. Most times when the screen comes back on, it is fine - but once it came back on the screen was going bananas. It appeared to be mostly grey, but looking closer revealed that all the pixels were going nuts, like a swarm of flies - and there was all sorts of colours going on! I had to unplug the HDMI connection (which caused my windows to move around) and then reconnect it, and then it was fine.
This only happens when using the HDMI port, and is not the monitor at fault - I eliminated it by swapping the screens over so that the other one was using the HDMI .. and it still happened!

As it turns out, the USB failed. The Apple people kept my PB and sent it for repair.
I dropped by the genius bar and left it with them on Dec 14 being told it would take 10 business days or so to get it back.
My trackpad button was very stiff, it stuck and had to press harder than normal to click. This was in effect since I took it out of the box when I bought it. Never bothered as I use a Bluetooth Apple mouse. Now that they kept it for repair for the USB port, they will also fix the trackpad.

Once per session, connected anyway

I have an authentication scheme that is set to once per session. The users are defined in oid and have to logon using sso.
So far so good. But in following scenario it goes wrong.
1. User enters the htmldb url
2. User gets the logon screen from sso
3. User logs in and is than forwarded to the application where the authorisation scheme says him he has no access and he is redirected to a public page that tells him this.
4. the user presses the 'Back' key on the browser, so he gets the login screen again.
5. he enters again his username and password, and enters.
-> now he is logged in and gets the screen he is not allowed to.
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Scott,
The solution of htmldb_util.reset_authorizations works fine. But in the end we choose another option.
We are using the error page now to display wether the user has no access to the application. It looks like the user has access to the error pag even if he has no access to any of the application pages. Now it works fine.
Now the authorization also returns false.
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Public and Authenticated App with Authorization Scheme once per session

I have a question . . .
Let's say I have an application and at the application level I have an authorization scheme (auth1). If auth1 is set up to evaluate once per session, does it authenticate for the public user, then pass me back to the page and then check then evaluate the auth1 scheme. Or does it evaluate the auth1 scheme, then log in, then return to the page. Is it the same regardless of authentication scheme (e.g. Oracle SSO).
It may make a big difference. If the authorization sheme is based upon the user (most will be) then setting it to evaluate once per session can be a real problem. If it evaluates before the user logs in, then it won't really work.
This is an even bigger question when the application does not have a authorization scheme at the application level and allows public pages. If a page that is not public has an authorization scheme set, and the user goes directly to that page, it seems to authenticate the authorization scheme and then logs you in, but does not re-evaluate authorization scheme after you are logged in. Is this accurate? I realize that I could set it up to evaluate for every page view, but I really only need it once after login.
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Anton,
It seems that all authorization schemes that are set to evaluate once per session are evaluated with the beginning establishment of a session.Sort of correct. Authorization schemes don't get evaluated until the component that uses them is considered for rendering or processing. So if the authorization scheme is attached to a page, it won't fire until the page is requested. If another component uses that scheme first, the evaluation will happen then and will not happen again during the session.
What if I have another page that is not public. If it is the first page I go to, what happens. Obviously, I get redirected to login, then login. Do the authorization schemes get evaluated at this point?Yes, assuming the authorization scheme is used by the page, the scheme is evaluated during the first rendering or processing of the page in the session, after the authentication step.
Now, what if I have a page that is public, but also has an auth scheme (odd, but could happen). Now what happens, does the auth scheme get evaluated before or after login?During the rendering or processing of the page after the authentication step. For a public page, the authentication step is performed up to the point where it determines that no authentication is required.
OK, now let's add in Application level auth scheme. I can have public or private pages. If I go to a private page, when does the app level auth scheme kick in? How about for a public page?When an application uses an authorization scheme, it gets evaluated before the authorization scheme (if any) for the page that is being requested, so the public/private property of the page doesn't matter.
General advice: when an authorization scheme uses :APP_USER, it doesn't work well to have it fire once per session because it'll get run before authentication to the application occurs, which sets APP_USER. You can have such schemes fire once per page view and for PL/SQL function-type schemes, have them give a "pass" when the current page is the login page, that kind of thing.
In addition, if the overhead of running a scheme is high, one can set an application-level item to indicate that a once-per-page scheme has already run satisfactorily. The PL/SQL-type schemes can access the value of such an item to skip the expensive part of the evaluation and return true immediately.
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You can use the <tt>apex_util.remove_sort_preferences</tt> method (although it is a bit of a blunt instrument). See the Admin guide for more information on user preferences.
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Why does my mini display port to hdmi adapter cut out intermittently?

I have a MacBook Air 2012. Using a bestbuy mini display port to hdmi adapter connecting to a sony led tv. The picture and sound transmits to the tv, but the signal would cut out after 10-15 seconds and it would last about 3-5 seconds and then the picture would come back again.

to me something happened similar to me but after removing the connector and put it back was solved, and now to use it with my TV I have to make sure both are well connected to both the Mac and plug the HDMI cable and adapter tv .
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Blessings.
a me me a pasado algo similar pero luego de sacar el conector y volverlo a poner se soluciono, y ahora para poder usarlo con mi TV tengo que asegurarme que esten bien conectados ambos tanto el conector al mac como el cable hdmi al tv y al adaptador.
espero que eso resuelva tus problemas como resolvio los mios
Bendiciones.

Why is my HDMI-connected display cutting out periodically?

I have a Mac Mini hooked up to a 40" Phillips LCD LED 1080p television using an HDMI cable. This setup worked awesome for about six months, but it has started giving me problems this week. I never really used the television for anything besides as a display for the Mini until last week, when I plugged in a couple of different older video game consoles (N64 and a PS2) into the YPbPr ports and switched sources on the T.V. Not sure if this is related or not, but it seems like that's when I started having these probelms. From what I've read about HDMI handshaking, it makes sense that switching devices can mess with it?
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It happens more often when I'm playing videos on Netflix, YouTube, etc., but it has happened when I'm just sitting on the Desktop, not doing a thing. It will sometimes not do it for up to an hour, and then it'll start doing it every five minutes so that you can't even watch video.
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Something to check first.
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In your case the former sounds more likely. Open System Preferences, then click on Energy-Saver and check the settings.
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HT6114 external display cutting out

since the new update every few minutes my external display keeps cutting out and have to unplug and re plug the hdmi cable back in

Hey there jamie0105,
It sounds like your external monitor is not funcitoning correctly with the computer after updating to Mavericks even after reseating your HDMI cable. I recommend these troubleshooting steps from the article named:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
Thank you for using Apple Support Communities.
All the very best,
Sterling

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My rMBP HDMI display cuts out once per session

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