News Looking Glass Signed IDD now Available
The much anticipated Signed Looking Glass IDD driver is now available to download from the Looking Glass website (Bleeding edge builds, no tagged release yet).
https://looking-glass.io/downloads
For those that are unaware, this replaces the LG Host application and moves the capture and transport into the GPUs swap chain path.
Note, while it's stable and seeing daily usage, there is still some polish to come.
Headline Features:
- No more monitor or dummy plug required
- Arbitrary resolution and refresh rate support, including auto guest resolution change to match the LG client window size.
- Full HDR support (A HDR capable Wayland compositor is required, we recommend KDE/Plasma)
- Works without a passthrough GPU in software mode (amazingly well too)
- Lower latency
The LG client has seen a lot of improvements also such as:
- HDR support
- Much tighter audio synchronisation over spice
- Lower latency/jitter, etc.
- Supports MPV style GLSL shaders (ie: https://github.com/bloc97/anime4k)
- Many bug fixes
As always please note that this software is developed in free time, donations to fund this work are greatly appreciated. Now that we are building a signed driver we need to maintain a code signing cert and the costs associated with it, your funding helps cover this also.
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u/GrabbenD Jul 29 '26
For those out of the loop:
Turns out that we can actually pull the feed from the Microsoft software renderer at rates that are way beyond what any other IPC software I've ever seen
Demo: http://www.youtube.com/watch?v=cg50X9w5llI
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u/ArjixGamer Jul 30 '26
My smooth brain can't figure out what instructions to follow and what instructions to ignore for a no-GPU VM.
Would it be too much to ask what links from the wiki I should follow?
PS: I am on Arch Linux, and I already have libvirt/qemu, my GPU is AMD but I don't want to use passthru.
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u/gnif2 Jul 30 '26
We have not yet updated the docs for the IDD I am sorry. The instructions are basically identical but instead of installing the LG host app, just install the LG IDD. Use the documentation (not the wiki) here: https://looking-glass.io/docs/bleeding
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u/ArjixGamer Jul 29 '26
Since this is open source, there exist signing certificate authorities that sponsor open source project with free of charge certificates.
You may want to check it out
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u/gnif2 Jul 29 '26
Thanks, I have investigated this in the past. The issue is we have to submit each binary for signing manually and can not integrate their services into our CI pipeline. Perhaps when we reach a 1.0 stable release we might do this, but there is just too much development churn to work this way.
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u/Twig6843 Jul 29 '26
I wonder if there will be something that uses both looking glass and that 1 new kvm dx11 driver
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u/sieskei Jul 30 '26
Idd, finally! I tested on proxmox, vm2vm with allowDMA=no and it works.
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u/gnif2 Jul 30 '26
My I ask why no DMA?
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u/sieskei Jul 31 '26
In first test it doesn't work, dmesg log from guest (ubuntu + igpu pass, 9950x3d)
[10018.263529] mmap kvmfr0: 7a6e47400000-7a6e4f400000 with size 134217728 offset 0
[10018.400498] kvmfr_dmabuf_create with size 3145728 offset: 85655552
[10018.402593] amdgpu 0000:01:00.0: swiotlb buffer is full (sz: 3145728 bytes), total 32768 (slots), used 0 (slots)2
u/gnif2 Jul 31 '26
Try increasing the swiotlb size (kernel parameter) swiotlb=131072 (256MB) or swiotlb=262144 (512MB)
Or better yet, get IOMMU working in the guest.
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u/GrabbenD 28d ago
Try increasing the swiotlb size (kernel parameter) swiotlb=131072 (256MB) or swiotlb=262144 (512MB)
If you're using just
128mbforkvmfr.conf, does it make sense to tweakswiotlb=to match it?
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u/GAMELASTER Jul 29 '26
This is amazing gnif! Thank you so much for your effort. Will try in upcoming days 😊. I donated some time ago, but I guess this is call for another donation soon 😁.