Running osu!lazer on NetBSD 9.0 as a KVM guest [part 1?]

July 21, 2020

I tried, as an experiment/curious endeavour, to run osu!lazer (2020.717.0) on a NetBSD 9.0 QEMU/KVM guest, on my machine. Here's the results:

Follow the Linux Emulation NetBSD guides, installing the linux compatibility packages (suse_*) was good enough to continue.
FUSE is not included by default, but thankfully, the AppImage gives instructions to extracting itself into a folder.
An AppRun file exists in the folder. Trying to execute it would give “Failed to initialize CoreCLR, HRESULT: 0x80070008”. It is related to ulimit -n, the default is way lower than 2048
Raise the file descriptor hard limit using sysctl kern.maxfiles, then bring up the hard limit (ulimit -Hn), then bring up the soft limit (ulimit -Sn). If I recall correctly, I bumped it up to 8000.
Some other failure happened while running AppRun, upon further inspection via ktrace/kdump, a sched_setaffinity syscall failed because of permissions.
Running it as root fixed that.
A traceback appeared regarding ICU libraries not being found, even though I have them installed.
You can edit osu!.runtimeconfig.json to disable that requirement. More here
osuTK kept talking about unsupported platforms. Upon further investigation, it was because no valid GPUs were found. A very cryptic error, for sure.
In the end and some more discussion, we blamed the fact I was running NetBSD as a KVM guest as the culprit. virt-manager only provides QXL, VGA, and virtio, and virtio gpu drivers aren't on NetBSD 9.0.

Maybe I'll run NetBSD as a host on one of my machines and keep this experiment running. Until then, that's what I got.

To be continued..?