Re: [vfio-users] vga passthrough works but no grub screen for linux guest
On 30/6/19 11:07 pm, Bronek Kozicki wrote: > On Sun, 30 Jun 2019, at 1:41 PM, Christoph Willing wrote: >> I have vga passthrough working with a linux guest running in qemu-3.1.0 >> on a host with two Nvidia Quadro K600 cards and the nvidia binary driver >> 430.26 installed. A dedicated keyboard & mouse is also passed through >> successfully so, in general, I'm pretty happy with the setup but ... >> >> when I use OVMF and run the guest without passthrough (just a regular >> qemu vm running on the host display) I see a grub screen to select a >> particular kernel, followed by the usual console output during bootup >> before X starts. However, when running with passthrough enabled, the >> guest vm's monitor (Samsung U28D590) shows nothing until X starts - >> there is no grub screen and no console output. >> >> Before I had the nvidia binary driver installed in the guest, I had some >> console output while booting but still no grub screen. >> >> Is there some way I can see everything including the grub screen, or is >> it normal not to see that in the guest? > > It is normal on my Quadro M5000 - these cards are not supported as primary > display with passthrough. This might be something to do with ROM, but I was > not successful trying to investigate further. To compensate for this all my > virtual machines have serial console, so I can do "virsh console" > > > B. > Thanks for the confirmation Bronek - it's good to know I'm not the only one seeing this. I'll give it a try with serial console. chris ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] remote display + vfio gpu?
On Sun, 30 Jun 2019 at 23:15, James Courtier-Dutton wrote: > Hi, > > Have you looked into the feasibility of what you are asking. > I see the main problem being the massive bandwidth that is needed. > Taking the output frames and passing them via shared memory is reasonable, > and that is what "looking glass" does. > Passing these same frames over the network is impractical. > There is just too much data to pass over the network. > > This is why various tools like QXL, Spice and VNC exist. Sorry if I didn't express myself correctly, but basically I'm trying to access one or 2 vms over spice, the thing is that I want to use a normal graphic card for 3d instead of the qxl device. If the performance is bad or good, as it's for testing I simply can live with bad performance. Best regards. José. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] remote display + vfio gpu?
On Sun, 30 Jun 2019 at 19:30, José Ramón Muñoz Pekkarinen < koali...@gmail.com> wrote: > On Sun, 30 Jun 2019 at 18:55, Patrick O'Callaghan wrote: > > > > On Sun, 2019-06-30 at 16:35 +0300, José Ramón Muñoz Pekkarinen wrote: > > > Hi vfio users, > > > > > > I've been taking a look recently to the looking > > > glass project[1], as well as spice display capabilities of > > > qemu, I was wondering if it's possible to have a linux > > > guest with only remote display and use a gpu passed > > > through for 3d rendering either through qxl driver with > > > dri prime, or just removing the qxl device after install. > > > > > > I did a try with qxl + dri prime, though glxinfo came > > > from qxl no matter of the env variable. > > > > > > [1] https://looking-glass.hostfission.com/ > > > > According to that page that only Windows 10 guests are supported at > > present. > > Oh, sure, my interest is to implement this kind of > vm in linux and windows 10, but I'm looking for alternative > ways rather than using looking glass, as it seems it > enforces to use shared memory. > > I see that using egl-headless I could get some sort > of capabilities, but not all of the gpu, and using spice only > I don't find a way to redirect the vga output to the remote > display. > > Best regards. > > José. > > Hi, Have you looked into the feasibility of what you are asking. I see the main problem being the massive bandwidth that is needed. Taking the output frames and passing them via shared memory is reasonable, and that is what "looking glass" does. Passing these same frames over the network is impractical. There is just too much data to pass over the network. This is why various tools like QXL, Spice and VNC exist. Kind Regards James ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] remote display + vfio gpu?
On Sun, 30 Jun 2019 at 18:55, Patrick O'Callaghan wrote: > > On Sun, 2019-06-30 at 16:35 +0300, José Ramón Muñoz Pekkarinen wrote: > > Hi vfio users, > > > > I've been taking a look recently to the looking > > glass project[1], as well as spice display capabilities of > > qemu, I was wondering if it's possible to have a linux > > guest with only remote display and use a gpu passed > > through for 3d rendering either through qxl driver with > > dri prime, or just removing the qxl device after install. > > > > I did a try with qxl + dri prime, though glxinfo came > > from qxl no matter of the env variable. > > > > [1] https://looking-glass.hostfission.com/ > > According to that page that only Windows 10 guests are supported at > present. Oh, sure, my interest is to implement this kind of vm in linux and windows 10, but I'm looking for alternative ways rather than using looking glass, as it seems it enforces to use shared memory. I see that using egl-headless I could get some sort of capabilities, but not all of the gpu, and using spice only I don't find a way to redirect the vga output to the remote display. Best regards. José. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] remote display + vfio gpu?
On Sun, 2019-06-30 at 16:35 +0300, José Ramón Muñoz Pekkarinen wrote: > Hi vfio users, > > I've been taking a look recently to the looking > glass project[1], as well as spice display capabilities of > qemu, I was wondering if it's possible to have a linux > guest with only remote display and use a gpu passed > through for 3d rendering either through qxl driver with > dri prime, or just removing the qxl device after install. > > I did a try with qxl + dri prime, though glxinfo came > from qxl no matter of the env variable. > > [1] https://looking-glass.hostfission.com/ According to that page that only Windows 10 guests are supported at present. poc ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
[vfio-users] remote display + vfio gpu?
Hi vfio users, I've been taking a look recently to the looking glass project[1], as well as spice display capabilities of qemu, I was wondering if it's possible to have a linux guest with only remote display and use a gpu passed through for 3d rendering either through qxl driver with dri prime, or just removing the qxl device after install. I did a try with qxl + dri prime, though glxinfo came from qxl no matter of the env variable. [1] https://looking-glass.hostfission.com/ Thanks! José Pekkarinen. ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
Re: [vfio-users] vga passthrough works but no grub screen for linux guest
On Sun, 30 Jun 2019, at 1:41 PM, Christoph Willing wrote: > I have vga passthrough working with a linux guest running in qemu-3.1.0 > on a host with two Nvidia Quadro K600 cards and the nvidia binary driver > 430.26 installed. A dedicated keyboard & mouse is also passed through > successfully so, in general, I'm pretty happy with the setup but ... > > when I use OVMF and run the guest without passthrough (just a regular > qemu vm running on the host display) I see a grub screen to select a > particular kernel, followed by the usual console output during bootup > before X starts. However, when running with passthrough enabled, the > guest vm's monitor (Samsung U28D590) shows nothing until X starts - > there is no grub screen and no console output. > > Before I had the nvidia binary driver installed in the guest, I had some > console output while booting but still no grub screen. > > Is there some way I can see everything including the grub screen, or is > it normal not to see that in the guest? It is normal on my Quadro M5000 - these cards are not supported as primary display with passthrough. This might be something to do with ROM, but I was not successful trying to investigate further. To compensate for this all my virtual machines have serial console, so I can do "virsh console" B. -- Bronek Kozicki b...@spamcop.net ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
[vfio-users] vga passthrough works but no grub screen for linux guest
I have vga passthrough working with a linux guest running in qemu-3.1.0 on a host with two Nvidia Quadro K600 cards and the nvidia binary driver 430.26 installed. A dedicated keyboard & mouse is also passed through successfully so, in general, I'm pretty happy with the setup but ... when I use OVMF and run the guest without passthrough (just a regular qemu vm running on the host display) I see a grub screen to select a particular kernel, followed by the usual console output during bootup before X starts. However, when running with passthrough enabled, the guest vm's monitor (Samsung U28D590) shows nothing until X starts - there is no grub screen and no console output. Before I had the nvidia binary driver installed in the guest, I had some console output while booting but still no grub screen. Is there some way I can see everything including the grub screen, or is it normal not to see that in the guest? Thanks for any insights or suggestions, chris ___ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
