Everything, what I found, is mentioning disabled wake timers in power options and sometimes is mentioned wrong sleep mode in BIOS.
What motherboard do you have? I'm curious what is 'Suspend mode - AUTO'. Maybe also could help turning on wake on RTC alarm.Yes, BIOS settings can change. E.g. in case of some HW failure, low battery voltage or anything else.
The original setting Suspend mode was S3. Today I tried the AUTO mode, but it also did not work.What motherboard do you have? I'm curious what is 'Suspend mode - AUTO'. Maybe also could help turning on wake on RTC alarm.Yes, BIOS settings can change. E.g. in case of some HW failure, low battery voltage or anything else.