Looking Glass - Triage

n0iz · July 27, 2018, 10:54pm

I really think you missed my first post since it provides most of the things you just listed. Sorry if I’m missing something.

Looking Glass - Guides, Help and Support Linux

looking-glass-client -s [I] main.c:692 | run | Looking Glass (a69630764b) [I] main.c:693 | run | Locking Method: Atomic [I] main.c:686 | try_renderer | Using Renderer: OpenGL [I] main.c:775 | run | Using: OpenGL [I] main.c:901 | run | Waiting for host to signal it's ready... [I] opengl.c:552 | pre_configure | Vendor : X.Org [I] opengl.c:553 | pre_configure | Renderer: Radeon RX 550 Series (POLARIS12, DRM 3.25.0, 4.17.9-1-hardened, LLVM 6.0.1) [I] opengl.c:554 | pre_configure | Version : 3.1 Mesa 18.1.4 [I] opengl.c:566 | pre_configure | Using GL_AMD_pinned_memory [I] main.c:921 | run | Host ready, starting session [I] main.c:177 | updatePositionInfo | client 1024x768, guest 1680x1050, target 1024x640, scaleX: 1.64, scaleY 1.64 [W] main.c:180 | updatePositionInfo | Window size doesn't match guest resolution, cursor alignment may not be reliable [I] opengl.c:602 | configure | Using decoder: NULL [E] opengl.c:536 | _check_gl_error | 682: glBufferData = 1282 (invalid operation) The last two lines repeat until both the host and guest freezes simultaneously for 10 to 20 seconds then the guest crashes without any BSOD or warning. The host recovers fine. I’m using latest Win10 LTSB (as of July 2018) as guest and an up-to-date Arch as host. The gpu passed to the guest is a R9 280x. I did a sanity check and the “glBufferData” function works fine for buffering a triangle vertices in a SDL window context using GLEW for gl functions binding. You are using a target I’m not familiar with (GL_EXTERNAL_VIR…

gnif · July 27, 2018, 10:57pm

Sorry yes, I did miss the extra details, so used to people leaving them out.

Please try disabling pinned memory support:

looking-glass-client -o OpenGL:amdPinnedMem=0

n0iz · July 27, 2018, 11:16pm

This fixes it, thank you!

gnif · July 27, 2018, 11:17pm

No worries…

The OpenGL code really needs a complete re-write to use vertex buffers, etc… I was pretty green with OpenGL when I wrote that stuff. This is the very next thing on my list so that this newly added YUV420 support can be added as a GL shader.

n0iz · July 27, 2018, 11:27pm

If you think of something you could delegate to my basic opengl knowledge, I’m glad to help back.

@Dynamic_Gravity The AUR package seems to be working fine for me with the option provided by @gnif .

cyberspectre · July 28, 2018, 2:20am

Hey everybody. New member. Glad to be here!

My system is powered by UNRAID. It runs a Windows VM and an Ubuntu VM concurrently, each with a dedicated Nvidia card (970FTW for Win, 760FTW for Ubuntu). Can I use Looking Glass to pass video from the Windows VM to the Ubuntu VM?

Dynamic_Gravity · July 28, 2018, 2:58am

If it works from the AUR then you’re just fortunate it’s working atm. Lots of other people further up had it not working. Youre free to do what you want, but just keep that in mind so you don’t pull your hair out for no reason.

ASimpleRadio · July 28, 2018, 3:08am

I would definitely seek out someone more knowledge on me than this,

but I am pretty sure it creates a buffer (or something) between host and guest, so I I don’t think you could pass to guest-to-guest,

(Like I said, don’t really know much about this, probably shouldn’t even be commenting, but figured I contribute)

EDIT:

Ignore what I said, heh.

ASimpleRadio · July 28, 2018, 3:10am

Part of what makes looking glass different from what I understand is it’s not a remote desktop thing but actual memory sharing between GPUs. (As you need pci passthrough)

gnif · July 28, 2018, 3:13am

It is certainly possible, you need to give the Linux guest an IVSHMEM device that points to the same shared memory file, and then use the kernel module provided with looking glass. See:

github.com

gnif/LookingGlass/blob/master/module/README.md

This kernel module implements a basic interface to the IVSHMEM device for
LookingGlass when using LookingGlass in VM->VM mode.

## Compiling

Make sure you have your kernel headers installed first, on Debian/Ubuntu use
the following command.

    apt-get install linux-headers-$(uname -r)

Then simply run `make` and you're done.

## Usage

This module requires the `uio` module to be loaded first, loading it is as
simple as:

    modprobe uio
    insmod kvmfr.ko

This file has been truncated. show original

Anerag · July 28, 2018, 3:27am

Does looking glass not do 144hz or am I missing something

tkoham · July 28, 2018, 3:31am

you have to be able to sample at twice that

gnif · July 28, 2018, 3:45am

It depends on your resolution… I am working on a solution to the problem though.

Anerag · July 28, 2018, 4:14am

Upon further investigation, it seems this one game in particular is acting weird. The game runs at about 50 ups and 200 fps, feeling horribly stuttery. Another game runs at 170 ups and 180 fps or so, which feels more or less around what I’d expect.

So is this my hardware bottlenecking, the game being funky or some bug in looking glass? Everything works fine viewed through an actual monitor.

Dje4321 · July 28, 2018, 4:16am

What is your resolution? iirc LG is currently hitting a memory transfer bottle neck with higher resolutions and higher frame rates.

Anerag · July 28, 2018, 4:18am

1920x1080, even tried 800x600 but got similar results.

gnif · July 28, 2018, 4:52am

Are you running with vsync disabled?? Looking Glass doesn’t work well without it.

Anerag · July 28, 2018, 4:54am

Disabling/enabling vsync doesn’t make a difference.

gnif · July 28, 2018, 4:55am

Please show the client log.

Anerag · July 28, 2018, 4:59am

[I]               main.c:716  | run                            | Looking Glass (a11-65-g13cd50f92c)
[I]               main.c:717  | run                            | Locking Method: Atomic
[I]               main.c:710  | try_renderer                   | Using Renderer: OpenGL
[I]               main.c:804  | run                            | Using: OpenGL
[I]               main.c:930  | run                            | Waiting for host to signal it's ready...
[I]             opengl.c:829  | pre_configure                  | Vendor  : NVIDIA Corporation
[I]             opengl.c:830  | pre_configure                  | Renderer: GeForce GTX 770/PCIe/SSE2
[I]             opengl.c:831  | pre_configure                  | Version : 4.6.0 NVIDIA 396.24
[I]               main.c:950  | run                            | Host ready, starting session
[I]             opengl.c:904  | configure                      | Using decoder: NULL

This?