Screen will not lock when run com.canonical.certification::fingerprint/unlock

[Kent Lin]

[Summary]
Screen will not lock when run com.canonical.certification::fingerprint/unlock
[Steps to reproduce]
Run all Finger print tests in com.canonical.certification::client-cert-desktop-22-04-manual

[Expected result]
Screen will lock after press "Enter" per test instruction

[Actual result]
Screen will not lock. Nothing happen.

[Failure rate]
100%

[Additional information]
CID:202112-29802
SKU: TRBA-DVT2-C4
Image: canonical-oem-somerville-jammy-amd64-20220425-25+jellyfish-tentacool+X19
system-manufacturer: Dell Inc.
system-product-name: XPS 9320
bios-version: 1.3.0
CPU: 12th Gen Intel(R) Core(TM) i7-1280P (20x)
GPU: 0000:00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:46a6] (rev 08)
kernel-version: 5.15.0-36-generic

[Stage]
Issue reported and logs collected right after it happened

[Kent Lin (kent-jclin)]

Automatically attached

[Kent Lin (kent-jclin)]

Automatically attached

[Kent Lin (kent-jclin)]

Automatically attached

[Kent Lin (kent-jclin)]

Automatically attached

[Pierre Equoy (pieq)]

I could not find anything related to fingerprint in the session you attached (comment #1).

The fingerprint/unlock job [1] runs the following python code:

  from evdev import UInput, ecodes as e
  ui = UInput()
  ui.write(e.EV_KEY, e.KEY_LEFTMETA, 1)
  ui.write(e.EV_KEY, e.KEY_L, 1)
  ui.write(e.EV_KEY, e.KEY_LEFTMETA, 0)
  ui.write(e.EV_KEY, e.KEY_L, 0)
  ui.syn()
  ui.close()

It simply triggers the keyboard shortcut to lock the screen (Super+L).

Unfortunately, this way of doing things does not work on Wayland. We need to update the code to find a way to lock the screen on Wayland.

Workaround: In the meantime, you can just lock the screen manually by pressing Super+L ("Super" = the Windows key).

[1] https://git.launchpad.net/plainbox-provider-checkbox/tree/units/fingerprint/jobs.pxu#n86

[Weichen Wu (weichenwu)]

test on ACS4P-DVT1-C2 with newest version, screen can successfully lock by running the test job

$checkbox-cli run com.canonical.certification::fingerprint/unlock