[SOLVED] After installing a new NVMe SSD in my laptop, it suddenly shuts down if it's in sleep mode for too long ?

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Are there still rt68cx21 events? Does reliability monitor show the same shutdown events with the NetAdapterCx dump file in the details? Is it still shutting down when it's in sleep mode, or is it now just random shutdowns?

The "chipset" drivers when using mobile System on Chip are a little confusing (which I hadn't considered), because there isn't a separate "chipset" from the CPU, so there also isn't a separate driver package. AMD doesn't provide a separate chipset driver for this APU. Asus does list a "chipset driver" somehow, so make sure you either have that version installed or that Windows has installed something newer. Asus lists the Radeon driver separately under Graphics, so I don't know if the chipset driver is actually included in the Radeon package or not.

You may want to go ahead and uninstall the Realtek NetAdapterCx driver package and try the NDIS package, if there have been continued events from that. Or try the "not support power saving" version. Without having access to go through the event viewer and not knowing for sure when it's actually rebooting during sleep mode, it's just going to be really hard to diagnose a lot further. (You can save the Event Viewer log and upload for someone else to read, though there is the obvious privacy/security risk in doing that.)

Do you recall when your system updated to Windows 11 24H2? Even now people continue running into the stupidest and most random issues with that update.
 
Are there still rt68cx21 events? Does reliability monitor show the same shutdown events with the NetAdapterCx dump file in the details? Is it still shutting down when it's in sleep mode, or is it now just random shutdowns?

The "chipset" drivers when using mobile System on Chip are a little confusing (which I hadn't considered), because there isn't a separate "chipset" from the CPU, so there also isn't a separate driver package. AMD doesn't provide a separate chipset driver for this APU. Asus does list a "chipset driver" somehow, so make sure you either have that version installed or that Windows has installed something newer. Asus lists the Radeon driver separately under Graphics, so I don't know if the chipset driver is actually included in the Radeon package or not.

You may want to go ahead and uninstall the Realtek NetAdapterCx driver package and try the NDIS package, if there have been continued events from that. Or try the "not support power saving" version. Without having access to go through the event viewer and not knowing for sure when it's actually rebooting during sleep mode, it's just going to be really hard to diagnose a lot further. (You can save the Event Viewer log and upload for someone else to read, though there is the obvious privacy/security risk in doing that.)

Do you recall when your system updated to Windows 11 24H2? Even now people continue running into the stupidest and most random issues with that update.
Since that one was an optional update, I have not done it yet it looks like. Should I or?

Quick update on what transpired yesterday before I do anything, because maybe these deets will help narrow it down somewhat, I'm not sure..

So yesterday, the problem appeared to be a bit different, in the sense that when I tried to wake it up from sleep, the RGB on the keyboard came right up but the screen stayed empty/blank, just sitting there. I was trying to ctrl alt del it but that didn't work.

Then last night before bed I put it in hibernate mode, woke up this morning and it came right out of hibernation mode, no problem.

I can post more Event Viewer shots, I just wasn't seeing anything that looked like anything at a first glance.
 
Since that one was an optional update, I have not done it yet it looks like. Should I or?
24H2 is only "optional" in that it will be a little while longer before they force you to install it or go without support or further updates. For most people it's better to go ahead and install, there just have been a LOT of problems and compatibility issues with it, like every update MS releases these days. They have MOST of them worked out but people still find new ones.

I'd say go back to using sleep mode instead of hibernate and see what happens. See if there are further events in viewer or reliability monitor. If there are still issues, but hibernate works and you're okay with using that, then disable sleep and just go with hibernate from now on. Beyond that, it sounds like it's either a hardware/BIOS issue or some deep software/driver bug that you're not going to be able to fix.
 
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24H2 is only "optional" in that it will be a little while longer before they force you to install it or go without support or further updates. For most people it's better to go ahead and install, there just have been a LOT of problems and compatibility issues with it, like every update MS releases these days. They have MOST of them worked out but people still find new ones.

I'd say go back to using sleep mode instead of hibernate and see what happens. See if there are further events in viewer or reliability monitor. If there are still issues, but hibernate works and you're okay with using that, then disable sleep and just go with hibernate from now on. Beyond that, it sounds like it's either a hardware/BIOS issue or some deep software/driver bug that you're not going to be able to fix.
Well, it's run 100% fine all week long. I have just been putting it into hibernation mode and it has always woke up from that fine. Also it hasn't had any "sudden shutdowns" either. No jinx (and fingers crossed), but all is well at the moment, or at least good enough.

Really appreciate all of your time and help!