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by eperot 4 hours ago
Thanks. We're working on rootless network setup to make `runsc do --rootless` work with networking enabled when `passt` is installed right now. See issue #13337 (yes that's a cool issue number) which should unblock this.

The tty issue is known, should be fixed soon too, though contributions welcome as it sounds like it should be simple fix and we love more contributions :)

FWIW, X11 apps work well, I have a personal hacky project in which I've been running Librewolf in gVisor, with the window being reflected as a native Wayland window. It uses `Xvfb -fbdir` aimed at a bound tmpfs mount to get a shared memory region containing the window's pixel data which can be read directly from out of the sandbox, has Pulseaudio audio passthrough, and a socket server passing through mouse/keyboard events to make the window interactive. Works smoothly even for YouTube playback, and I successfully played a game of Unreal Tournament 2004 at 24fps in it, with no noticeable mouse/keyboard latency :) We're basically making baby steps to get there less hackily.

Thanks for the feedback!
1 comments
coppsilgold 4 hours ago
That's good to hear! Hopefully the passt approach you are pursuing will include the ability to use an existing passt socket and not just launch one for you.

Wayland is tricky because there are memory buffers being shared between the compositor and the client. crosvm (also by google) adopted 2 custom solutions to it of which one got merged into mainline.

Achieving audio passthrough is trivial as it's just a unix socket. `-host-uds=all`

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eperot 3 hours ago
That's the approach I initially took, but experienced some combination of noticeable stuttering and latency regardless of which buffering strategy I tried... Had to switch to a shared memory ring buffer, along with some adaptive playback speed shenanigans (sometimes imperceptibly speeding up playback when falling behind production of audio samples, sometimes imperceptibly slowing down when there's less than a few milliseconds' worth of samples left in the ringbuffer), in order to achieve actually-gapless playback.
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coppsilgold 2 hours ago
There is something wrong with your setup.

I just tried:

    bwrap ... --ro-bind /run/user/1000/pipewire-0 /run/user/1000/pipewire-0 ... -- runsc ... do ... -- mpv podcast.mp3
Flawless playback. I think it's a default pipewire configuration.
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