Passthrough PCI GPU device fails on reboot

[Francesc Guasch]

El 27/7/21 a les 12:29, Erik Skultety ha escrit:
> On Tue, Jul 27, 2021 at 11:22:25AM +0200, Francesc Guasch wrote:
>> Hello.
>>
>> I have a host with an NVIDIA RTX 3090. I configured PCI passthrough
>> and it works fine. We are using it for CUA and Matlab on Ubuntu 20.04.
>>
>> The problem comes sometimes on rebooting the virtual machine. It doesn't
>> happen 100% of the times but eventually after 3 or 4 reboots the PCI
>> device stops working. The only solution is to reboot the host.
>

While reviewing the system I noticed that, though I had
run dist-upgrade, the host didn't had the latest kernel.

Upgrading from kernel 5.8 fixed the problem. So it seems
it was a vfio problem as Erik pointed.

Thanks !