nvdc: nvdcEventThread select failed: Bad file descriptor

[MarkSwanson]

Short info header:

• GFX version: master / 6612aaa
• OS:Ubuntu 18
• GPU:Jetson Nano

It's great that Vulkan support works ootb.
I don't know the importance of this error yet. I just started working with a physical Jetson Nano.
TIL - the Jetson nano is running the CPU in 64-bit mode (aarch64 / armv8l).

I don't get this error with an Nvidia 1070ti on Windows 10.
Creating this bug report to track this issue - perhaps there is some small extra cleanup that needs to be done on the Nano.

$ cargo run --bin compute --features vulkan 1 2 3 4
Finished dev [unoptimized + debuginfo] target(s) in 0.31s
Running /home/jetson/src/gfx/target/debug/compute 1 2 3 4
Times: [0, 1, 7, 2]
nvdc: start nvdcEventThread
nvdc: nvdcEventThread select failed: Bad file descriptor

[kvark]

@MarkSwanson does Vulkan work on that board in general? i.e. with vkcube and such.
Are validation layers installed on the machine?

[MarkSwanson]

Vulkan seems to work fine (compute and non-compute).
vulkaninfo works ootb
Another vulkan demo is provided:
jetson@jetson:~$ vulkan-smoketest
nvdc: start nvdcEventThread
298 presents in 5.00031 seconds (FPS: 59.5963)
frames:586, elapsedms:10194
nvdc: exit nvdcEventThread

Note the end line "nvdc: exit nvdcEventThread". This happens for every vulkan program I run.
(I only see the 'bad file descriptor' message when running wgpu examples)

Wrt vkcube, I followed the instructions here:
https://github.com/KhronosGroup/Vulkan-Tools/blob/master/BUILD.md

and it works fine.
I'm not sure if I have to 'git pull' the validation layers...

[kvark]

Thanks! I wonder if it's related to winit then. Could you try running https://github.com/MaikKlein/ash examples, please?