BSOD if TB3 Enclosure or Hard Drive plugged in before Login
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BSOD if TB3 Enclosure or Hard Drive plugged in before Login  


New Member
Joined: 2 years ago

So I'm trying out the eGPU experiment, and I have run into a snag.  1st the details;

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If I have either the Razer Core or Lacie drive plugged in before login (and a few seconds after login), I BSOD with a DRIVER_VERIFIER_DMA_VIOLATION.  Unplugging the devices allows for a normal boot, then I can plug them back in.  I can leave the caldigit plugged in, and just unplug the drive from the caldigit.  This is kind of annoying as I keep all my games on the Lacie, and I have to tell all the game clients (steam,, epic, etc....) not to launch on startup, so I can plug in their hard drive, then start them.  I know the Razer and Lacie work, because I used them on a Samsung flex book.

I did some googling, and ran across this thread no solutions though, but problem sounds almost identical.  Some other thoughts I was thinking about from the googling is TB security levels.  I can't find anything in the bios related to this.  The Windows Thunderbolt utility shows the devices connected, and not needing approval.  I don't see any type of policy settings in there though to set the security level.  Its behaving like I have a boot security problem.  I'm waiting for a callback from Lenovo, but I doubt their ability to be able to help me.  Any ideas?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.