[vfio-users] Fwd: vga and subsystem

[ehsan davoodi]

oh noooooooo
I cant belive.
Please tell the meaning of  "no-go" is not "not supported" or "not
supported yet" .:-)

one of the best situation for VGA passthrough is in laptop which has two
vga.
I will wait and hope some one find the solution
thanks

On Thu, Aug 20, 2015 at 10:05 PM, Will Marler <will at wmarler.com> wrote:

> I think others will chime in here, but in general, VGA passthrough is a
> no-go on laptops : (.
>
> On Thu, Aug 20, 2015 at 9:54 AM, ehsan davoodi <e.davoodi at gmail.com>
> wrote:
>
>>
>> Dear Mr Alex Williamson AND VFIO USERS
>> first sorry about my English and
>> sorry for disturbing your time but I have some questions please.
>> I am not computer programmer and try to solve my problem but I cant.
>>
>> I am using Linux in my Laptop (OpenSuse 13.2) and want to use VGA
>> passthrough.
>> I add some patches "ACS override patch
>> <https://lkml.org/lkml/2013/5/30/513>" and "i915 VGA arbiter patch
>> <https://lkml.org/lkml/2014/5/9/517>" to kernel 4.1.3 and compile it.
>>
>> my problem is that subsystem ID of VGA does not recognized in Linux and
>> therefore when it passthrough kvm the driver of windows not installed. In
>> windows(host) vga works fine and  subsystem Id is 14AD1043.
>> In Linux just after boot the subsystem is correct but after running VM
>> and after shutting down it the subsystem not recognized (three condition
>> and outputs are in lspci-nv.txt) so in vm subsystem will be 00000000 (guest
>> win.png).
>> I tried to change main windows driver inf file nvami.inf(nvami.inf.txt)
>> and add another gtx 850m to list with zero subsystem but hash error not
>> permit driver installation.
>>
>> I extract VGA ROM(vga4pres) from laptop bios(n56jkas.203 in
>> http://dlcdnet.asus.com/pub/ASUS/nb/N56JK/N56JKAS203.zip) and use it in
>> xml but not changed.
>>  other PCI like my LAN recognized subsystem in Linux and when passed to
>> kvm worked fine.
>> Attachments are some of my outputs and my configs.
>>
>> lsmod
>>
>> lspci -vvvv
>>
>> /etc/modeprobe/99-local.conf
>>
>> my grub:
>>  resume=/dev/disk/by-uuid/a7507032-1ea2-43dc-a1aa-3d9754aedb19
>> splash=silent quiet showopts nomodeset intel_iommu=on acpi_backlight=vendor
>> vfio_iommu_type1.allow_unsafe_interrupts=1 i915.enable_hd_vgaarb=1
>> i915.modeset=0 pci-stub.ids=10de:1391 rd.driver.pre=vfio-pci
>> pcie_acs_override=downstream
>>
>> thanks lot
>>
>>
>>
>>
>>
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>>
>>
>
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