For me installing the web drivers helped. I installed the most recent version for 10.11.3:
boot flags are as listed before plus nvda_drv=1 (added by clover automatically).
same problem here. My GTX 460 with MacPro 3,1 doesn't seem to work anymore. I never had to use the alternative drivers before. Yosemite ran fine without them.
When booting verbosely I see plenty of "NVDA channel timeout" errors, which I interpret as the card not being able to create the...
The most reliable solution for me has been to install the sound driver from the Mavericks Multibeast, version 6.10. Apparently Apple started changing the drivers back then to fix some sleep issues with their sound cards, which broke it more reliably for hackintosh users.
The situation might be...
[SOLVED] Kernel Panic in IOUSBFamily/AppleUSBComposite
After trying several "cleanup" maneuvers, I got rid of the kernel panics by uninstalling the logitech control center. It also contained some kernel extensions which could have produced the error.
I had tried running the installed Kext Utility, which repairs file system permissions and rebuilds "the system cache files". This might do the same thing. Triggering the option directly in Kext Wizard didn't change the behavior either.
I regularly encounter kernel panics on boot. The backtrace looks like this:
Kernel Extensions in backtrace:
Somehow the issue seems to disappear if I select "ignore kernel caches" in the boot menu...