urgent - mac book pro oct. 2011 - problem with mdp to dvi

[pixelschubser]

hello everyone,

if i plug in my mdp to dvi adapter and plug in the second screen i get direct a hanging mouse and the kernel_task process is raising to 50% - what coul dbe the problem?

i already switched off the grafic card switch in the energy settings to the internal intel grafic card...

hope some one knows that problem and can help as my gig is starting in a few minutes - so long i have to use my old macbook...

best

pixelschubser

[lotech]

If you do switch to only using the Intel Gfx you won't get a second output at all as it only supports video to the internal LCD.

[pixelschubser]

in the mean time i found out - that this problem only occurs when i connect it with the tv one....

[Scratchpole]

Hi, I had this problem earlier in the year.
Sorry I didn't see this thread at the time.

This issue is caused by an un-terminated earth pin on the DVI display device. Dropping down to VGA with DVI converter on the TVone input will solve the issue as VGA on DVI has a separate earth pin.

I blame Apple, quite a few people have had this problem with no satisfactory answer on the apple discussion lists etc.

Likewise I had to use my 2008 mbp as back up while I resolved the issue with the newer machine.

[deepvisual]

but computers aren't earthed. not MBPs anyway
its a two wire PSU.. so how does that work?

[Scratchpole]

http://en.wikipedia.org/wiki/Digital_Visual_Interface
http://en.wikipedia.org/wiki/File:DV...tor_Pinout.svg
Pin 15: Ground: Return for pin 14 and analog sync
C5: Analog ground, Return for R, G, and B signals

I could be wrong in my analysis, but I know dropping down to VGA solved the trackpad/mouse issues when I plugged into a range of devices.

One new 1080p monitor that I tried did not create any problems, pluging into the TVone, LED processors and the TV in my hotel all caused the trackpad to stop working properly.

[deepvisual]

so what you are saying is, if you run analog DVI-I out with a DVI-D adapter it wont work
no surprises there..