XPA 13-9380 Ubuntu Nvidia drivers not loading

Question

Hi,   I'm trying to use the XPS 13 9380 with Ubuntu 18.04 and an external Nvidia GPU in a Razer Core. I've tried the driver version 390 and 430. I've tried the 4.15, 4.18 and 5.1.1 kernels. But I still have the same error in `dmesg` :   [ 118.981359] nvidia-nvlink: Nvlink Core is being initialized, major device number 511 [ 118.981668] NVRM: This PCI I/O region assigned to your NVIDIA device is invalid: NVRM: BAR1 is 0M @ 0x0 (PCI:0000:23:00.0) [ 118.981668] NVRM: The system BIOS may have misconfigured your GPU. [ 118.981670] nvidia: probe of 0000:23:00.0 failed with error -1 [ 118.981681] NVRM: The NVIDIA probe routine failed for 1 device(s). [ 118.981682] NVRM: None of the NVIDIA graphics adapters were initialized! [ 118.981768] nvidia-nvlink: Unregistered the Nvlink Core, major device number 511 Based on my research, it might be a BIOS related issue.   https://devtalk.nvidia.com/default/topic/1049263/linux/-nvrm-this-pci-i-o-region-assigned-to-your-nvidia-device-is-invalid-nvrm/post/5325456/#5325456   https://devtalk.nvidia.com/default/topic/1047349/linux/unable-to-load-the-nvidia-drm-kernel-module-on-centos-7/post/5315092/#5315092

jeanmarc.leroux · Accepted Answer

It started working this morning.

Here is what I've done:

* reinstall Ubuntu 18.04 from scratch

* use a second monitor directly from the first (top left) thunderbolt port with a USB C to HDMI (+ power) adapter

* just this morning, tried to plug the eGPU (GTX 1080 in a Razer Core) on the 2nd (bottom left) thunderbolt port : after the boot, the eGPU was not detected (same error as my 1st post)

* reboot with the eGPU connected to the 1st (top left) thunderbolt port

* eGPU is detected, and the monitor is also detected

* install the nvidia-390 drivers directly from the Ubuntu "Additional drivers" tab

* reboot

* eGPU and screens are detected...

I have no idea what I did different from my 1st install/try.

Maybe because the whole install has been performed with secure boot disabled.

Johnny Leone · Answer

Same issue here with a XPS 9380 and a Razer Core X. Currently i have tested it with a Nvidia GTX 970. I'm getting the same error message in dmesg.

Edit: I found a workaround for the issue.

If I boot the device with the egpu plugged in it does not get the necessary memory bars from kernel. You can verify this with "lspci -vv".

As soon as the egpu is then plugged to the second thunderbolt port it works.

jeanmarc.leroux · Answer

What do you mean by 'second thunderbolt port'? Can you please provide a step by step procedure? Thank you!

Johnny Leone · Answer

You have 2 thunderbolt ports on the left side.

I have plugged in the egpu to one of them first.

After verifying the unallocated memory bars, I insert the egpu to the other port at the notebook.

After this all memory bars are getting allocated correctly, and the egpu starts working.

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