Den 11 jul 2016 11:37 fm skrev Arman Khalatyan <arm2...@gmail.com>: > > I just testing several GPUs with pci-passthrough: GTX630, Tesla 2050 and > FX5800. > None of them I got running with opengl/direct rendering inside the virtual > machine. > I was thinking something to do with qxl driver, but after blacklisting it in > the VMs kernel nothing was changed. > The VMs Xorg claiming always no display found even if I configure it with > headless option: nvidia-xconfig -a --use-display-device=None > --virtual=1280x1024 > But with nvidia-smi I can see the GPU status, and I can run all cuda tests > where opengl/X11 is not involved. > My test system is CentOS 7 with ovirt 4. > BTW If I clone VM which was not running, to real host on bare metal, > everything is running as expecting.
Don't remember If this was mentioned but have you tried doing the same thing but with virt-manager on a standalone host, just to rule out oVirt from the equation? /K > > > > > > > > *********************************************************** > > Dr. Arman Khalatyan eScience -SuperComputing > Leibniz-Institut für Astrophysik Potsdam (AIP) > An der Sternwarte 16, 14482 Potsdam, Germany > > *********************************************************** > > On Mon, Jul 11, 2016 at 9:06 AM, Martin Polednik <mpoled...@redhat.com> wrote: >> >> On 08/07/16 11:29 +0200, Michal Skrivanek wrote: >>> >>> >>>> On 06 Jul 2016, at 14:06, Francesco Romani <from...@redhat.com> wrote: >>>> >>>> >>>> From: "Arman Khalatyan" <arm2...@gmail.com> >>>> To: "users" <users@ovirt.org> >>>> Sent: Monday, July 4, 2016 11:52:24 AM >>>> Subject: [ovirt-users] Is it possible to disable qxl video? >>>> >>>> >>>> Hi, >>>> I am doing PCI Passthrough for GPUs. >>>> Is it possible somehow to disable/remove default video qxl? >>>> thanks, >>>> Arman,. >>>> Hi, >>>> >>>> The 4.0 Vdsm allows you to run a headless VM, meaning a VM without graphic >>>> device/frontend. >>>> Not sure Engine allows you that however. >>> >>> >>> no it doesn’t >> >> >> Even if engine allowed that, it may not be the correct solution. >> >> Running headless with PCI passthrough is considered primary VGA >> passthrough[1]. Using primary VGA passthrough without OVMF could cause >> (will cause) quite a bit of headaches. >> >> If you really want to try that, I assume using before_vm_start hook to >> remove the video device should be enough. >> >> [1] http://wiki.xenproject.org/wiki/Xen_VGA_Passthrough - it's >> possible to read about primary and secondary passthrough between the >> lines >> >>> However, if QXL is the problem (why is that so?) then you can switch to >>> VGA(or CIRRUS if this is still 3.6) >>> >>>> I'm afraid you will need to write a Vdsm hook. >>>> >>>> There could be simpler solutions depending on the Engine >>>> >>>> Bests, >>>> >>>> -- >>>> Francesco Romani >>>> RedHat Engineering Virtualization R & D >>>> Phone: 8261328 >>>> IRC: fromani >>>> _______________________________________________ >>>> Users mailing list >>>> Users@ovirt.org <mailto:Users@ovirt.org> >>>> http://lists.ovirt.org/mailman/listinfo/users >>>> <http://lists.ovirt.org/mailman/listinfo/users> >> >> >>> _______________________________________________ >>> Users mailing list >>> Users@ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >> >> >
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