MacPro GFX 980Ti Yosemite 10.10.5 ouch...

[DMCDesign]

A few weeks ago I switched over from Radeon Cards in my MacPro 5,1 to a NVidiaGFX980Ti (EFI flashed by MacVidCards). At the time I was running 10.10.4 and once the appropriate drivers were installed all worked well. The system is dual monitor with two Dell 24" monitors. Today I foolishly allowed an update to 10.10.5 after checking to see that Nvidia had there latest WebDriver available for the new release (they did). Installed the new drivers but after the install the system refuses to recognize the two monitors via the 980Ti. I've pulled the card and re-installed the Radeons, and the system is now back up and running, but I'm curious if anyone else has come across this or something similar and resolved it?

Here's hoping. the 980Ti is great for the 3D work I'm doing, and I'd really like to get back to it.

Thanks,

Doug

 

[MacVidCards]

Please go to our website, you just need to update the web driver.

 

[DMCDesign]

Please go to our website, you just need to update the web driver.

Sorry but I did update the web driver. Both initially via the Update dialog which Nvidia Driver Manager came up with (as noted in your blog) and then when that didn't work, by turning off the web driver, and directly downloading and installing. i've also tried completely uninstalling the web driver and re-installing the latest version from your website FAQ links.

Doug

 

[MacVidCards]

Hi, as I have emailed you, what you are describing is textbook "no web driver loaded on an EFI card" behavior.

Keep in mind that any time you do a PRAM or NVRAM reset you trigger the OS X driver to become main driver.

 

[DMCDesign]

Well, the problem has finally been solved…

Had reinstalled my Radeon Cards, then cleared out NVRam with CMD-OPT-R-P. Re-installed the NVidia driver. Rebooted the machine. Oddly enough it rebooted showing the NVidia WebDriver as being running which seemed strange with the Radeon cards in there, but I reset it to OSX Default. Rebooted. Made sure NVidia Driver Manager was showing OSX Default drivers as being in command. Re-installed the GFX 980TI. Rebooted. Driver Manager still showed OSX Default drivers running. Changed to WebDriver. Rebooted. Did Happy Dance when second monitor lit up. All is now back. Whew!

Thanks to dp at MacVidCards for your advice that the behaviour was so consistent with no driver. It made me begin to think that that was the case in spite of what the driver manager was reporting, which made me think about doing a total clear of the NVRam. that seemed to do the trick.

Doug

 

[Asgorath]

The NVIDIA Driver Manager shows the state of the nvda_drv=1 boot-arg. If that boot arg is present, it shows that the web driver is active. If it's not, it shows the Apple driver being active. This is orthogonal to the presence of an NVIDIA GPU in the system, it's simply showing you which driver would be selected.