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vm:proxmox:kvm:gpu_poassthrough [2020/05/13 16:20] – created niziakvm:proxmox:kvm:gpu_poassthrough [2021/07/17 13:48] (current) – niziak
Line 1: Line 1:
 +
 ====== GPU passthrough ====== ====== GPU passthrough ======
 +===== AMD APU =====
 +[[https://gist.github.com/SimonTod/72945457c4d7e741a382ba9ce9c4731b]]
  
-Problem with NVidia card GT218. Device detected under Windows 10, driver installed automatically, but device is not working. Error code 43. +===== PCIe  =====
  
 <code bash> <code bash>
Line 9: Line 11:
 update-initramfs -u update-initramfs -u
 </code> </code>
 +
 +<code bash>
 +lcpci
 +26:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)
 +
 +lspci -n -s 26:00.0
 +26:00.0 0300: 10de:0a65 (rev a2)
 +
 +echo "options vfio-pci ids=10de:0a65" > /etc/modprobe.d/vfio.conf
 +
 +rmmod vfio-pci
 +modprobe vfio-pci
 +
 +dmesg
 +[536167.737504] vfio-pci 0000:26:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
 +[536170.155565] vfio-pci 0000:26:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
 +[536170.173544] vfio_pci: add [10de:0a65[ffffffff:ffffffff]] class 0x000000/00000000
 +</code>
 +
 +
 +
 +
 +===== Error code 43 =====
 +
 +It is generic error code. Possible reasons:
 +
 +==== KVM detected ====
 +Problem with NVidia card GT218. Device detected under Windows 10, driver installed automatically, but device is not working. Error code 43.
 +
 +Nvidia drivers detects KVM. KVM can be hidden for guest OS:
 +
 +<file | /etc/pve/qemu-server/702.conf>
 +cpu: host,hidden=1
 +</file>
 +NOTE: Proxmox already contains fixes for Nvidia, so it is not needed. 
 +
 +===== BAR 3: can't reserve =====
 +Lots of errors on host dmesg:
 +<code>
 +vfio-pci 0000:26:00.0: BAR 3: can't reserve [mem 0xf0000000-0xf1ffffff 64bit pref]
 +...
 +pcieport 0000:00:03.1: AER: Multiple Uncorrected (Non-Fatal) error received: 0000:26:00.0
 +pcieport 0000:00:03.1: AER: Multiple Uncorrected (Non-Fatal) error received: 0000:26:00.0
 +pcieport 0000:00:03.1: AER: Multiple Uncorrected (Non-Fatal) error received: 0000:26:00.0
 +</code>
 +
 +GPU was used as host main adapter in graphic mode. To fix it add following kernel arguments: <code>nomodeset textonly video=vesafb:off video=efifb:off</code>
 +
 +<file /etc/default/grub>
 +GRUB_CMDLINE_LINUX_DEFAULT="nomodeset textonly video=vesafb:off video=efifb:off"
 +</file>
 +
 +<file /etc/kernel/cmdline>
 +root=ZFS=rpool/ROOT/pve-1 boot=zfs rootdelay=4 mitigations=off panic=30 nomodeset textonly video=vesafb:off video=efifb:off
 +</file>
 +
 +<code bash>
 +update-grub
 +pve-efiboot-tool refresh
 +</code>
 +
 +===== This device cannot find enough free resources that it can use. (Code 12) =====
 +
 +Solution was to select "Primary GPU" on PCI Device (x-vga=1 option in Proxmox config file)
 +
 +
 +