My 7,1 has started rebooting by itself apparently when it goes to sleep.
I haven't caught it to see exactly when it happens because I'll go away from it for some hours. When I return it announces it has rebooted. I always use the "report to Apple" option.
No idea why; it's been updated to Sonoma 14.4.1 (23E224) for some weeks and this started well after the update. No other software has been added making the "why" a complete mystery to me...
Any ideas?
Tom
So this is just a working theory based on my own experiences with a system very similar to yours (and soon to become more similar when the PCIe storage goes in)...
Your system is waking and sleeping periodically throughout the night(?) while it is supposed to be asleep. However, it is not waking fully, rather it is waking into a reduced-wakefulness mode, in which hardware drivers are not fully engaged - for example, your GPUs drivers aren't loaded and if you had more than 2 displays connected, you would be having window arrangement problems upon full wake, because in safe mode (which is what this reduced wake mode resembles) the system only supports 2 displays.
Some process, or bit of hardware on your system doesn't react well to this, and eventually suffers a catastrophic failure, bringing down the system.
The best troubleshooting procedure for an initial test is to disable all automated wake processes by locking the system out of the power schedule, and clearing scheduled wake events.
Technique described
here.
See if that stops the problem happening.
*edit* to be clear, there is no GUI or option combination to prevent this periodic wake during sleep - it is caused (in mine, and other cases I've found described) by the calendar notifications system making sure the computer hasn't moved geographically while sleeping, which would throw out "time to leave" notifications.
