I have a Lenovo Thinkpad L450swith ubuntu v18.04 on it. When I started the laptop a few hours ago, it hanged on the login screen. I thus long-pressed the power button to restart the system. However, since then, no matter how long or how many times I press the Power button, the laptop won't come out of sleep mode.
When I say sleep, the power button keeps blinking. Approaches I have tried so far:
- Remove battery, long-press the power button to discharge it completely. Then, connect the charger and press the power button to switch it on: Same result as above.
- Remove battery, connect the charger and press the power button to switch it on: Same result as above.
Please suggest how can I make it come out of this sleep/standby mode.
Right now, I have kept the battery removed and connected it to my charger.