Fenix: [Bug] QR code scan issues on OnePlus A3

[AndiAJ]

Prerequisites

Log in to Firefox desktop with a valid user and navigate to firefox.com/pair and generate the pairing QR code

Steps to reproduce

1. Tap Turn on sync
2. Tap Ready to scan

Expected behavior

Scan of the QR code should be performed immediately / reliably.

Actual behavior

Somtimes nothing happens, the camera seems to distort the image

Device information

• Android device: OnePlus A3 (Android 6)
• Fenix version: Latest build from master

Notes

VIdeo

[kumarharsh]

+1 - the camera opens but it is never able to scan the square QR code. I think it's because the camera is squishing the image in the horizontal direction, so the QR code square is taller than it is wide in the image captured by the camera. Please look into this.

[sblatz]

Labeling as a p2 as it could hurt FxA onboarding and turn new users away. Let's investigate if this is device specific.

[csadilek]

@sblatz might be worth verifying if this still happens now that https://github.com/mozilla-mobile/fenix/issues/3889 is fixed in Nightly.

[sblatz]

@csadilek thanks for that fix! Going to throw a QA needed on this.

[AndiAJ]

Hi, still no luck, the image seems to be distorted on the latest Nightly Build #190724 from 24/7 using
• OnePlus 6T (Android 9)
• OnePlus 3 (Android 6.0.1)

OnePlus 6T video
OnePlus 3

[AndiAJ]

Hi, the scanning issue is happening when trying to scan a QR code from the URL bar as well using a OnePlus 3 (Android 6.0.1) on:

• Fenix 2.2.0-rc.2
• Nightly Build #12900612 from 17/10

[vesta0]

Adding this to the AC board - this is high priority as it impacts a lot of devices and their ability to login to FxA.

[AndiAJ]

Reproducible on Fenix 3.0.2 Build #20081833 from 1/8 using a OnePlus A3 (Android 6)

[kumarharsh]

Which QR Codes can Firefox Preview scan? Almost all codes except the main one in the Wikipedia article are not scannable using a OnePlus 6 device: https://en.wikipedia.org/wiki/QR_code

[cadeyrn]

FWIF I can not reproduce with OnePlus 7T Pro and Android 10.

[csadilek]

@AndiAJ We were able to reproduce this on the OnePlus6T, scanning the code from firefox.com/pair. We've verified and landed a fix, but couldn't get a OnePlus A3 to verify. Can you confirm this is working now (should go out in tonight's build 200219 06...)?

[AndiAJ]

Hi @csadilek , I've re-checked this matter on the latest Nightly 200219 Build #20500606 from 2/19 using the following devices:
• OnePlus6T (Android 9)
• OnePlus A3 (Android 6)

It still doesn't work properly, 1 out of 10 attempts were successful on each device.
The isolated successful attempt per device happened after I when back to the Fenix Settings screen and afterwards re-tried.

[csadilek]

@AndiAJ Sorry for the additional roundtrip. I don't see the fix being applied in latest Fenix either. Will investigate.

[csadilek]

@AndiAJ OK, the fix is now in the latest Nightly "200219 18:01" and I can no longer reproduce the problem on the OnePlus 6T. Can you take another look, please? :)

[AndiAJ]

Hi @csadilek , I've re-checked this matter on the latest Nightly 200219 Build #20510607 from 2/20 using the following devices:
• OnePlus 6T (Android 9)
• OnePlus A3 (Android 6.0.1)
• OnePlus A2005 (Android 6.0.1)

On both the OnePlus 6T & OnePlus A2005 scan now works flawlessly.
On the other hand on the OnePlus A3 there still seem to be some issues, namely the camera seems to be zooming in too much.

► Video from OnePlus6T

► Video from OnePlus A3

► Video from OnePlus A2005

@csadilek - Please review and share your thoughts ☺️
I'll remove the QA needed label until further notice.

[csadilek]

Thanks for verifying. As this is working fine now on the OnePlus 6, OnePlus 7T, and A2005 as well as various other devices we tested, I am updating the title here and marking this for triage again and suggest lowering priority.

I'll try and get an A3 to test and we can revisit.