[vfio-users] NVIDIA driver crash based on Seabios in libvirt

[Eddie Yen]

For Q35, try upgrading to rawhide components (qemu 2.5.0 + libvirt 1.3).  I
could not get my OVMF+Q35 setup to work with the stock Fedora 23 versions
(was getting the same Code 10 error from the NVIDIA drivers; I have a GTX
970).  FWIW, I don’t seem to need the "x-vga=on" parameter with OVMF+Q35 (I
did need it with an earlier setup, using the same hardware, where I was
using SeaBIOS+i440fx instead).

As I known, need to add x-vga=on if using Seabios, otherwise it's
unnecessary to add it using OVMF, or may want to bring GPU as secondary
card in VM.


Anyway, for the Code 10 error, I suspect it might be the following commit
from Alex that fixed it for me:


http://git.qemu.org/?p=qemu.git;a=commit;h=0282abf078c3353a178ab77a115828ce333181dd


You can keep your stock Fedora 23 install and upgrade just the qemu
packages using these commands:


sudo dnf install fedora-repos-rawhide

sudo dnf install —enablerepo rawhide libvirt


There are also kernel bugs related to MTRR in 4.2.7.  If you want to give
your Windows VM more than 2.5GB of RAM, you may need the patches from here:


https://bugzilla.kernel.org/show_bug.cgi?id=107561


Well, either that, or downgrade to the 4.1 kernel.  I'm actually using the
latest from git (4.4.0-rc6) with the 2 patches from bug 107561 above.
Guest is Windows 10 with the latest NVIDIA driver package (361.43).  I
haven’t tried both passthrough + graphic at the same time as you are, I’m
using the passthrough video only.


-Aaron

Thanks about these information, I'll try it and send the result messages in
these days.

-Eddie

2015-12-24 0:00 GMT+08:00 Aaron Campbell <aaron at monkey.org>:

> On Dec 23, 2015, at 2:11 AM, Eddie Yen <missile0407 at gmail.com> wrote:
>
> Update:
>
> Today I'm doing few tests on my 4820K+X79 platform.
> The Host is already upgraded to Fedora 23, which QEMU was upgraded to
> v2.4.1, and the kernel was 4.2.7-fc23
> Then, same as previous, using GTX980 as guest VM card. And guest was
> Windows 7.
>
> Here is my results.
>
> 1. Q35 / x-vga=on / without graphic >>> Got monitor but Code 10
> 2. Q35 / non x-vga=on / with graphic >>> Blank monitor + Code 10
> 3. Q35 / x-vga=on / with graphic >>> Same as 2
>
>
> For Q35, try upgrading to rawhide components (qemu 2.5.0 + libvirt 1.3).
> I could not get my OVMF+Q35 setup to work with the stock Fedora 23 versions
> (was getting the same Code 10 error from the NVIDIA drivers; I have a GTX
> 970).  FWIW, I don’t seem to need the "x-vga=on" parameter with OVMF+Q35 (I
> did need it with an earlier setup, using the same hardware, where I was
> using SeaBIOS+i440fx instead).
>
> Anyway, for the Code 10 error, I suspect it might be the following commit
> from Alex that fixed it for me:
>
>
> http://git.qemu.org/?p=qemu.git;a=commit;h=0282abf078c3353a178ab77a115828ce333181dd
>
> You can keep your stock Fedora 23 install and upgrade just the qemu
> packages using these commands:
>
> sudo dnf install fedora-repos-rawhide
> sudo dnf install —enablerepo rawhide libvirt
>
> There are also kernel bugs related to MTRR in 4.2.7.  If you want to give
> your Windows VM more than 2.5GB of RAM, you may need the patches from here:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=107561
>
> Well, either that, or downgrade to the 4.1 kernel.  I'm actually using the
> latest from git (4.4.0-rc6) with the 2 patches from bug 107561 above.
> Guest is Windows 10 with the latest NVIDIA driver package (361.43).  I
> haven’t tried both passthrough + graphic at the same time as you are, I’m
> using the passthrough video only.
>
> -Aaron
>
> 4. i440fx / x-vga=on / with graphic >>> Both monitor and VNC got blank
> 5. i440fx / non x-vga=on / with graphic >>> BSOD 0x3B
> 6. i440fx / x-vga=on / without graphic >>> Works
>
> But if using AMD V4800 as guest card then using method 5, it works.
>
> So this may proved that Alex talked about before, it's impossible to make
> graphic and pass-through GPU exist together.
> Only AMD, and NVIDIA card that Quadro K2200 and higher can be as secondary
> GPU (As I know, it's possible to make VNC (Spice) and monitor worked at the
> same time on Windows 10, just different resolution).
>
> I'll try to get K2200 if I got enough budget.
>
> 2015-12-22 10:04 GMT+08:00 Eddie Yen <missile0407 at gmail.com>:
>
>> Hello, everyone.
>>
>> These days I'm testing about NVIDIA cards on Seabios based VM.
>> And I found that if using libvirt to boot up VM, may cause BSOD if using
>> kvm=off.
>> But if using QEMU command to launch, I got no issues.
>>
>> I googled, and found that libvirt still had this issue.
>> And sometimes I need to use Seabios because I had few NVIDIA cards that
>> didn't support UEFI.
>>
>> Here is my QEMU command
>>
>> http://pastebin.com/TcPswnjH
>>
>> And here is my libvirt XML
>>
>> http://pastebin.com/vwScrVZs
>>
>> The libvirt is created by virt-manager and edited manually.
>>
>> Many thanks,
>> Eddie.
>>
>
> _______________________________________________
> vfio-users mailing list
> vfio-users at redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20151224/5068cd94/attachment.htm>