GUI hangs (black screen)

REPRODUCIBILITY (% or how often): 50% (under investigation)
BUILD ID = OS VERSION (Settings > About product): 4.1.0.24 (Kvarken)
HARDWARE (XA2, X10, X10 II, …): Xperia X
UI LANGUAGE: Russian
REGRESSION: (compared to previous public release: Yes, No, ?): No, previous version also had this issue

DESCRIPTION:

After initial boot, entering phone PIN and SIM-PIN, home screen appears maybe for 2-3 seconds, after that screen goes black (not switched-off). After a second or two white round circle (waiting mark) appears, and screen goes black again with no response at anything. Screen has black light and becomes warm after a couple of minutes. Phone reboots normally by holding power button. Then bug reproduces.

PRECONDITIONS:

Maybe charging battery at 100%?
Phone is usable at 95% battery.

STEPS TO REPRODUCE:

  1. Charge phone at 100%
  2. Unlock the screen.
  3. Try to do something.

EXPECTED RESULT:

ACTUAL RESULT:

ADDITIONAL INFORMATION:

(Please ALWAYS attach relevant data such as logs, screenshots, etc…)

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