Tapping your finger on the fingerprint sensor should wake the device up similar to pressing the power button, after which you can easily unlock it.
Steps to reproduce the bug
Setup fingerprint ID unlocking
Press power button to turn the screen on
Put finger on fingerprint sensor
Nothing happens
Expected behaviour
Device should wake up from sleep and the display turn on.
Additional context
FW93XX_FDT_UP_DETECT is visible on Android dmesg when this functionality works, but it seems on Ubuntu Touch the trustzone fingerprint sensor firmware just enters a FW93XX_Sleep mode instead where nothing is transmitted back to the kernel in, needs further confirmation though.
Is this a new report?
Yes
Device model
Volla Phone 22 (2022)
OS version
20.04 (r35)
Describe the bug
Tapping your finger on the fingerprint sensor should wake the device up similar to pressing the power button, after which you can easily unlock it.
Steps to reproduce the bug
Expected behaviour
Device should wake up from sleep and the display turn on.
Additional context
FW93XX_FDT_UP_DETECTis visible on Androiddmesgwhen this functionality works, but it seems on Ubuntu Touch the trustzone fingerprint sensor firmware just enters aFW93XX_Sleepmode instead where nothing is transmitted back to the kernel in, needs further confirmation though.