On 2018-07-26 12:56, Alex John wrote:
Hello!I was experimenting with dynamically rebinding my GPU (nvidia <-> vfio-pci) and it works exactly two times and crashes on the third time. More details and kernel logs as follows: I boot the system using the 1080 GTX as the boot GPU, X starts fine, everything is useable. When I need to boot up one of VMs I * first kill X server, and wait for it to completely shut down * unbind the device from the nvidia driver * bind it to vfio-pci * do the same for the HD audio device * unbind the framebuffer device by doing echo "efi-framebuffer.0" > \ /sys/bus/platform/drivers/efi-framebuffer/unbind * restart X with a different configuration file that starts it on the intel iGPU (i965) This works fine. I get a vtconsole that is modesetted by the intel driver while I'm working in the iGPU. Once done, I kill X again, rebind the card to the nvidia driver and start X on it. All good uptil this point. However, I've lost virtual console at this point and if I try to drop to it using Ctrl+Alt+F1 etc my CPU stalls. The relevant snipped portion of the log can be found below. The full log is also at: https://bpaste.net/show/0f80d62444df If anyone has encountered this before any input would be appreciated. Thank you! Alex
i think dynamic rebinding of nvidia gfx cards is a really bad idea and i don't think you can expect it to work.
in my experience for things to work well with assigning a physical gfx card to a vm nothing must touch the card other than vfio-pci.
if you let nvidia driver bind to it then you will have problems. _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
