This is most likely the snap strict confinement that prevents communication
with the serial device.
Can you please run the following command in a terminal, then run chromium and
reproduce the problem, and share the output of the terminal here?
journalctl -f | grep chromium
** Changed in: chromium-browser (Ubuntu)
Status: New => Incomplete
** Summary changed:
- Web Serial fails to access local device
+ [snap] Web Serial fails to access local device
** Tags added: snap
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to chromium-browser in Ubuntu.
https://bugs.launchpad.net/bugs/1890365
Title:
[snap] Web Serial fails to access local device
Status in chromium-browser package in Ubuntu:
Incomplete
Bug description:
A javascript-based web page works fine when accessed through Chrome,
fails to recognize that any devices exist when accessed from Chromium
on the same Unubtu 20.04 platform.
The code includes the following snippet:
const requestOptions = {
filters: [{ usbVendorId: 0x1881 }]
};
port = await navigator.serial.requestPort(requestOptions);
await port.open({ baudrate: 9600 });
writer = port.writable.getWriter();
reader = port.readable.getReader();
Under Chrome 84.0.4147.105 (Official Build) (64-bit), ttyACM0 device
is listed in the pop-up, is selectable, and can communicate. Under
Chromium 84.0.4147.105 (Official Build) snap (64-bit), the pop-up
contains only "No compatible devices found" message.
Experimental Web Features flag is enabled in both browsers.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1890365/+subscriptions
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