[vfio-users] gpu passthrough problems after upgrade qemu 2.5 -> 2.6

Sat Jun 4 21:51:27 UTC 2016

Hi Jiri,

I just wanted to add that a similar issue is effecting me. With qemu 2.6, I
get a black screen after the seabios screen. Downgrading to 2.5.1 fixes it
for me. I tried 2.6 with the pc-i440fx-2.5 machine type, but that didn't
work either.

If anyone has any ideas, let us know.

Thanks

On Fri, Jun 3, 2016 at 3:26 AM, Jiri 'Ghormoon' Novak <ghormoon at gmail.com>
wrote:

> Hello,
>
> yesterday I've upgraded to qemu 2.6 (I've just rebuilt debian sid
> package for jessie, previously I did the same with 2.5 and just added
> input-linux patches).
>
> I'm using vga passthrough on HP Elitebook 8560p laptop with Radeon HD
> 6470M, passing it in with x-vga=on (no ovmf, it doesn't have ovmf firmware)
>
> After the upgrade, when booting linux, it shows bios screen, then
> alternates black and garbage screen for few minutes, then reboots (?),
> bios screen again, black screen, linux (only after driver kicks in, no
> grub/boot screen, previously it worked). Rebooting from guest makes it
> go through this all again including the few minutes of garbage sreens.
> There's nothing in guest logs for that time, likely it doesn't even pass
> grub.
>
> For windows it actually boots on first attempt, but also no output until
> driver kicks in (previosly it shown boot screen or worked without ati
> drivers installed)
>
> in the dmesg, there's quite a lot of rdmsr errors (on 2.5 there few a
> few too, but they appeared once, not in multiple batches like now).
>
> I assume some graphic modes are now handled differently. Is it only a
> change in defaults that I can override or is it a bug?
>
> dmesg:
> [  136.888758] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X
> [  136.992866] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X
> [  136.993181] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [  140.329803] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow
> Control: None
> [  140.329858] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [  148.661906] VFIO - User Level meta-driver version: 0.3
> [  148.667113] ehci-pci 0000:00:1a.0: remove, state 1
> [  148.667123] usb usb3: USB disconnect, device number 1
> [  148.667126] usb 3-1: USB disconnect, device number 2
> [  148.667128] usb 3-1.1: USB disconnect, device number 3
> [  148.667327] usb 3-1.2: USB disconnect, device number 4
> [  148.667931] cdc_ncm 3-1.2:1.6 usb0: unregister 'cdc_ncm'
> usb-0000:00:1a.0-1.2, CDC NCM
> [  148.701340] ehci-pci 0000:00:1a.0: USB bus 3 deregistered
> [  148.876484] ehci-pci 0000:00:1d.0: remove, state 1
> [  148.876505] usb usb4: USB disconnect, device number 1
> [  148.876512] usb 4-1: USB disconnect, device number 2
> [  148.876517] usb 4-1.1: USB disconnect, device number 3
> [  148.986636] usb 4-1.4: USB disconnect, device number 4
> [  149.045785] usb 4-1.6: USB disconnect, device number 5
> [  149.055202] ehci-pci 0000:00:1d.0: USB bus 4 deregistered
> [  149.099334] xhci_hcd 0000:05:00.0: remove, state 4
> [  149.099348] usb usb2: USB disconnect, device number 1
> [  149.116629] xhci_hcd 0000:05:00.0: USB bus 2 deregistered
> [  149.116699] xhci_hcd 0000:05:00.0: remove, state 4
> [  149.116710] usb usb1: USB disconnect, device number 1
> [  149.118085] xhci_hcd 0000:05:00.0: USB bus 1 deregistered
> [  149.408028] IPv6: ADDRCONF(NETDEV_CHANGE): br0vmtap10: link becomes
> ready
> [  149.408081] br0: port 1(br0vmtap10) entered forwarding state
> [  149.408092] br0: port 1(br0vmtap10) entered forwarding state
> [  149.408305] IPv6: ADDRCONF(NETDEV_CHANGE): br1vmtap10: link becomes
> ready
> [  149.408333] br1: port 1(br1vmtap10) entered forwarding state
> [  149.408343] br1: port 1(br1vmtap10) entered forwarding state
> [  151.128482] vfio_cap_init: 0000:00:1a.0 hiding cap 0xa
> [  151.232527] vfio_ecap_init: 0000:00:1b.0 hiding ecap 0x5 at 0x130
> [  151.340394] vfio_cap_init: 0000:00:1d.0 hiding cap 0xa
> [  156.620596] dmar: DRHD: handling fault status reg 3
> [  156.620662] dmar: DMAR:[DMA Read] Request device [00:1d.0] fault addr
> ef000
> DMAR:[fault reason 06] PTE Read access is not set
> [  157.585018] kvm: zapping shadow pages for mmio generation wraparound
> [  164.431957] br0: port 1(br0vmtap10) entered forwarding state
> [  164.431966] br1: port 1(br1vmtap10) entered forwarding state
> [  243.766285] kvm [4369]: vcpu0 unhandled rdmsr: 0x606
> [  243.766358] kvm [4369]: vcpu0 unhandled rdmsr: 0x34
> [  244.095770] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  244.149600] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  244.149606] vfio-pci 0000:05:00.0: irq 48 for MSI/MSI-X
> [  244.149828] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  244.149832] vfio-pci 0000:05:00.0: irq 48 for MSI/MSI-X
> [  244.149835] vfio-pci 0000:05:00.0: irq 49 for MSI/MSI-X
> [  245.276448] kvm [4369]: vcpu0 unhandled rdmsr: 0x611
> [  245.276518] kvm [4369]: vcpu0 unhandled rdmsr: 0x639
> [  245.276582] kvm [4369]: vcpu0 unhandled rdmsr: 0x641
> [  245.276644] kvm [4369]: vcpu0 unhandled rdmsr: 0x619
> [  245.438562] vfio-pci 0000:00:1b.0: irq 50 for MSI/MSI-X
> [  245.499553] vfio-pci 0000:01:00.1: irq 51 for MSI/MSI-X
> [  245.608806] vfio-pci 0000:01:00.0: irq 54 for MSI/MSI-X
> [  577.967787] kvm [4369]: vcpu0 unhandled rdmsr: 0x606
> [  577.967861] kvm [4369]: vcpu0 unhandled rdmsr: 0x34
> [  578.306848] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  578.357705] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  578.357712] vfio-pci 0000:05:00.0: irq 48 for MSI/MSI-X
> [  578.357855] vfio-pci 0000:05:00.0: irq 47 for MSI/MSI-X
> [  578.357859] vfio-pci 0000:05:00.0: irq 48 for MSI/MSI-X
> [  578.357863] vfio-pci 0000:05:00.0: irq 49 for MSI/MSI-X
> [  579.069686] kvm [4369]: vcpu0 unhandled rdmsr: 0x611
> [  579.069757] kvm [4369]: vcpu0 unhandled rdmsr: 0x639
> [  579.069822] kvm [4369]: vcpu0 unhandled rdmsr: 0x641
> [  579.069885] kvm [4369]: vcpu0 unhandled rdmsr: 0x619
> [  579.197944] vfio-pci 0000:00:1b.0: irq 50 for MSI/MSI-X
> [  579.251914] vfio-pci 0000:01:00.0: irq 51 for MSI/MSI-X
> [  581.257044] vfio-pci 0000:01:00.1: irq 54 for MSI/MSI-X
>
> Thanks,
> Gh.
>
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