Update README with vfio-pci.conf instructions

Added instructions for creating vfio-pci.conf in README.

README.md

@@ -144,7 +144,11 @@ If you see an Apple logo and the bar doesn’t move on your external display, yo
 In some environments it is necessary to segment the IOMMU Groups to be able to pass the GPU to the VM.
 
 1. Add the content `pcie_acs_override=downstream,multifunction pci=nommconf` in the file `/etc/default/grub` at the end of the line `GRUB_CMDLINE_LINUX_DEFAULT`;
-2. After changing the grub file, run the command `update-grub` and reboot your PVE.
+2. Some environments, add de content `pcie_port_pm=off disable_idle_d3=1` in the file `/etc/default/grub` at the end of the line `GRUB_CMDLINE_LINUX_DEFAULT`;
+3. After changing the grub file, run the command `update-grub` and reboot your PVE.
+
+Some environments, you need create a `/etc/modprobe.d/vfio-pci.conf` with content:
+`options vfio-pci ids=XXXX:XXXX,XXXX:XXXX disable_vga=on`
 
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