REPRODUCIBILITY (% or how often): 100%
BUILD ID = OS VERSION (Settings > About product): 4.1.0.24
HARDWARE (XA2, Xperia 10…): Xperia XA2, Xperia 10 II
UI LANGUAGE: English
REGRESSION: (compared to previous public release: Yes, No, ?): Yes
DESCRIPTION:
When screen is off, the volume cannot be changed with the volume up / down buttons.
PRECONDITIONS:
Screen off
STEPS TO REPRODUCE:
Start media player
Shut screen off
Try to change volume with hardware buttons
EXPECTED RESULT:
Volume changed
ACTUAL RESULT:
No change in volume
ADDITIONAL INFORMATION:
(Please ALWAYS attach relevant data such as logs, screenshots, etc…)
I too have noticed it, but it only fails about 70% of the time for me. Sometimes it works as it should.
This bug has been there a looong time, and over many phones. I keep thinking to report it, but never quite get around to it. But thank you for reporting, i really hope it gets fixed.
There is already protection against that, by means of the volume limiter.
Some further testing has shown that @attah is correct, it is probably about 70% of the time that the problem shows up (at least on Xperia 10II).
I must admit that I cannot remember having seen the problem before 4.1, but that may be a coincidence.