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Sometimes UEFI settings lost aft. waking fr. sleep
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Muxlix View Drop Down
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Joined: 23 Jun 2019
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    Posted: 23 Jun 2019 at 9:27pm
X470 Taichi (non-ultimate) board is a few months old.

I put the computer in sleep mode overnight and wake it in the morning by pressing the power button. When it wakes up, it (sometimes) reboots once or twice (wasn't paying attention at the time but it did take much longer than usual - pausing during the reboot before powering back up) and when it comes back up the UEFI settings are back to their defaults, so I need to choose the speed for my RAM again, etc.

Over the past few days this has happened twice. The first time a few days ago and the second time this morning, So it isn't a regular occurrence and I can't replicate it yet.

It has happened once after waking from sleep in Windows 7 and once in openSUSE (I dual boot), so it doesn't seem OS-related.

Could this be caused if the lithium battery is getting low?
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xhue View Drop Down
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Points: 634 		Post Options Post Options   Thanks (1) Thanks(1)   Quote xhue Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2019 at 9:52pm
Could be the battery, although it's very rare. Anyway, they are cheap, so replace it just in case.

It could be your PSU too. Check cabling. Also, sometimes some PSU don't handle some sleep states properly and shut down completely when sensing too low currents. There are some workarounds that.

It's also good to update BIOS and clear CMOS afterwards.
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Muxlix View Drop Down
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Muxlix Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2019 at 10:08pm
Thanks, I didn't consider the PSU. While I got a new system, I reused the PSU from my old system, so it's a number of years old.
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xhue View Drop Down
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Points: 634 		Post Options Post Options   Thanks (1) Thanks(1)   Quote xhue Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2019 at 10:19pm
Originally posted by Muxlix Muxlix wrote:

Thanks, I didn't consider the PSU. While I got a new system, I reused the PSU from my old system, so it's a number of years old.


While wattage may be sufficient, there are updates of the ATX spec over the years.

Also, PSU itself could be failing due to old age.
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