New MacBook connected to external VGA display screen flash.

Same problems here - connecting a Samsung 2232BW+ via DVI on a new macbook. (Note that this isn't just a VGA issue, as one poster noted)

I get snow on initial connection for about two seconds, and random flickers to black while working.

The display also sometimes won't wake from low-energy mode, and requires unplugging and re-plugging the adapter to get it to work.

What would be lovely is a response from apple, saying "hey, we hear you, and we're working on it. Expect a fix in x time (ish)."

Apple?

I have a Macbook 2008, 4gb RAM connected to a dell 2505 24" via mini DVI convertor and running native 1920x1200 and I'm getting similar problems as discussed.

1. Laptop seems to be quite hot.
2. Artificats on external monitor appear as random 1px high lines perhaps 50pixels wide. In my experience this represents a graphical glitch caused by excessive heat.
3. Random total blanking of external display. Blanking lasts up to 2 seconds and can happen as much as 3 times per minute.
4. On resume from sleep i can only see a black screen with a mouse cursor that is working accross both laptop monitor and external monitor but no login box anywhere. Ctrl ShftEsc doesn't help.

Snap.

Macbook 2008 connected by Displayport/DVI adapter to 20" Cinema Display. I get:

1 Artificats on external monitor appear as random 1px high lines perhaps 50pixels wide
2. Random total blanking of external display. Blanking lasts up to 2 seconds

Disconnecting and then reconnecting the adapter seems to clear the problem. Let's hope there is a better solution on the way.

Just wanted to put my vote in that I am also experiencing the same issue with a Dell 24" external monitor using VGA.

Here is what's weird though. I used one displayPort to VGA adapter and it would CONSTANTLY flash off and on (obviously not usable), so I tried a friends displayPort to VGA adapter which would work for about 5min then flash for half a second.

I swapped them back and forth many times, interesting that the issue changes on a per-adapter basis (again these were both identical displayPort to VGA adapters, but different results).

Maybe the adapters are the problem?

To let everyone know - I went out an purchased a displayPort -> DVI to try since my VGA wasn't working. I have yet to experience any problems.

Suggestion: go buy a DVI adapter.

Keep us posted - as I mentioned above, I'm using a DVI adapter, and have had the same problems from the start.

I have the same problem with the VGA adapter. I hope we will have a fix...

I have a 2.4 Ghz Macbook.

Attempting to connect to Samsung television over a display port - vga adapter.

The Macbook recognizes the Tv.

The Tv does not recognize a signal from the Macbook.

The same adapter scenario works on an old CRT monitor no problem.

I haven't been using my MB with my monitor too much just cause this problem is annoying, but the other day I actually had trouble even getting an image to show up. This seems like such a weird and widespread problem that I'm really surprised Apple let it slip through the cracks. I don't see how they could have missed this in testing.

Can we have a feed back from Apple support ?? like we work on it....

Having the same issue, with a DVI connector to my Dell 19" running at 1280 x 1024. I get a lot of random flickering. When i unplug the monitor and them plug it back into the macbook, or readjust the resolution it corrects the problem temporarily but then comes back at least once a day.

My external monitor (VGA) problems were getting more and more frequent at 1680 x 1050. I lowered resolution to 1440 x 900, and the problem disappeared. I have been running that way for several days without glitches. Every time I switched back to the higher resolution, however, the flicker immediately returned.

Today, I installed the "Digital Camera Raw Compatibility Update" (2.3) that was delivered via Software Update. It installed and rebooted, and since then, I have not had any screen problems at 1680 x 1050! Not sure how it could be related, but since installing that update and rebooting, I have had no further screen flash issues! It's been holding steady for a while now. In the past, I would definitely have seen screen outages multiple times in this timeframe.

As always, YMMV.

John

My screen flashing has returned, but only at 1680x1050. The wait for a fix goes on...