attaching host video crash vm

[alain.roger]

Hi,

my host system is kubuntu 15.10 and i have the latest version of VB.
i have a guest OS (win7) for testing purpose.

I want to attach my graphical card of my host to VM in order to use it in my guest OS.

so i run in ubuntu, lspci and also in my guest OS in order to know what are the needed information.

here is the result of my lspci in my host OS (ubuntu)


lspci on my guest OS (windows) returns 00:02.0 for default video card of virtualbox.

therefore i did modify my VM as following:

Code: Select all

VBoxManage modifyvm "win7" --pciattach 01:00.0@00:02.0

i got nothing as result of this change.

but when i launch the VM i got an error message as following:

Code: Select all

Failed to open a session for the virtual machine win7.

Failed to open physical device: not existing, or not available (VERR_ACCESS_DENIED).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

i checked my VM settings and everything seems ok


so where is the mistake ?

thx

[mpack]

I see no mention that this is a secondary card. Do you understand that the guest can't use the graphics card if the host is already using it? That if you succeeded you'd make the host unusable and therefore the VM too?

[Perryg]

Also you need to enable iommu in the host and your CPU must support VT-d