Return to Level1Techs.com

A little teaser of what is to come :)


#588

Pretty much yeah


#589

As long as it’s outputting any signal, it doesn’t need to be digital.


#591

on ubuntu I am unable to run the command:
sudo -u qemu ivshmem-server -p /tmp/ivshmem.pid -S /tmp/ivshmem_socket -l 16M -n 8

It says user does not exist

I tried running it as libvirt-qemu but that also got denied
I get the following error message:
cannot open shm file ivshmem: Permission denied
cannot bind

Does anyone know why?


#592

libvirt doesn’t run qemu as qemu, it first runs I believe as libvirt, and then changes to qemu. Try running ivshmem-server as the libvirt user.


#593

It’s official, we now have an IRC channel on FreeNode, the prior owner (gnomethrower) has kindly relinquished the channel to us for Looking Glass.

Join #LookingGlass on FreeNode :smiley:


#594

these are my only 2 libvirt usernames and neither work, I get permission denied on both

libvirt-qemu:x:122:130:Libvirt Qemu,:/var/lib/libvirt:/bin/false
libvirt-dnsmasq:x:123:131:Libvirt Dnsmasq,:/var/lib/libvirt/dnsmasq:/bin/false


#595

It was off the top of my head, an educated guess would say to give libvirt-qemu a try.


#596

I managed to do a workaround using my username, however I am getting the following error message now:
error: Failed to start domain WINDOWS
error: internal error: process exited while connecting to monitor: 2017-12-19T02:58:11.314996Z qemu-system-x86_64: -chardev socket,path=/tmp/ivshmem_socket,id=ivshmem: Failed to connect socket: Permission denied


#597

who owns the file /tmp/ivshmem_socket?


#598

my user account


#599

You need to ensure libvirt launchers qemu as a user that has access to that socket file… you will need to experiement. Nobody has yet documented the procedure for this under Debian/Ubuntu.


#600

@wendell, you should mention this in the news tomorrow! I find this information very pertinent to maintaining a successful project!


#601

So so far has only the testing been on fedora?


#602

Nope, I run Debian… but I don’t use libvirt, and I don’t have time to write documentation like this and develop the project at the same time. If someone want’s to write a guide then sure!


#603

Ok so I think I found some confusion
On the quickstart guide, if I go to this link https://looking-glass.hostfission.com/node/6 (which is the ubuntu guide), and click on Configuring libvirt for Looking Glass
It takes me to https://looking-glass.hostfission.com/node/2
However if I click on Configuring libvirt for Looking Glass on the guide menu, it takes me to this link: https://looking-glass.hostfission.com/node/9


#604

Ahh! someone made an error when linking, thats the fedora one… I have fixed it, thanks!


#605

Thanks m8


#606

what does this mean for people who has an eGPU setup that uses 4Gbps mPCIe or expresscard?
will we get better performance with limited bandwith ?


#607

It depends on your resolution and target refresh rate, this tech is too new to give a definitive answer.


#608

I just tried it on intel gvt-g with i5 7200u, it works very well.