Disable Nvidia driver to regain iTunes HDCP function

[Angelus]

Hi everyone,

I'm just posting this here so that it might help others.
Historically I've had no issues playing HD iTunes movies a my Mac Pro 5.1 with GTX 760 and Dell U2414H display.

It's been a while since I last watched a movie on my Mac so I don't know when the error first started but today I couldn't play any HD movies as I would get the "This movie cannot play on a monitor that doesn't support HDCP" message.

I did a search on here and saw that numerous people have been plagued with this for years.
Long story short, I rebooted, repaired permissions, rest SMC, tried different cables (DP the, DVI to HDMI, then HDMI to HDMI) and the message was the same.

I was pretty peeved at this stage and then thought I'd revert back to the stock Mac OS drivers. Now I've used the Nvidia web driver before without issues but sure enough, I disabled the Nvidia driver, restarted the Pro and now all of these movies are playing again.

I appreciate it won't solve everyones issue but if you've been having this problem and you have that driver installed maybe try reverting back to the stock Mac OS drivers.

Kind regards,

Angelus

 

[tomvos]

Thanks for the hint. I had the problem that iTunes (12.6.0.100) did freeze the whole computer yesterday when I played a movie from iTunes. The movie was just SD, so no HDCP should be involved.

After reverting to the default graphics driver, the movie played fine, no freeze. Something must have changed in 10.12.4, the 367.15.10.45f01 and iTunes. Playing videos from VLC or MPlayer works just fine.

 

[Synchro3]

No problems here with Nvidia web drivers. Bought HD-Movies in iTunes play fine, also from the cloud.

Sierra 10.2.4, iTunes 12.6.0.100, WebDriver-367.15.10.45f01, GTX Titan X.

Are your cards with Mac-EFI or vanilla PC-cards?

 

[tomvos]

It's an EVGA GTX 680 2GB flashed with the Mac Edition EFI. Basically the same as the official Mac Edition.

I noticed it's actually tied to one movie: "I Am Legend". Other movies play fine, however I did not check every movie in my library. So maybe it was broken before 10.12.4 and the 367.15.10.45f01. It's a little bit strange, in the log files I see only something like this:

Sat Apr 8 22:17:46 2017

Event: GPU Reset
Date/Time: Sat Apr 8 22:17:46 2017
Application: WindowServer
Path:
Tailspin: /Library/Logs/DiagnosticReports/gpuRestart2017-04-08-221746.tailspin
GPUSubmission Trace ID: 0
OS Version: Mac OS X Version 10.12.4 (Build 16E195)
Graphics Hardware: NVIDIA GeForce GTX 680
Signature: 0

Report Data:

NVDA(Graphics): Channel timeout!
Channel Info: [0, 0x2, 0x6, 0x170644]
Version Info: [com.nvidia.web.GeForceWeb, 10.1.7, 0x4e554e, 21879823, 367.15.10.45f01, 1]

Well, nothing is free from bugs. As long as I can switch between both drivers, it's not much of an issue.