klesk
Posts: 22
Joined: Tue Aug 08, 2017 7:16 am

Will undervoltage ruin the device

Tue Sep 28, 2021 5:30 am

I have a Raspberry PI with 360 days uptime :D
Poor thing keep having this in the log:

Code: Select all

[Tue Sep 28 07:24:12 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:24:26 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:27:48 2021] rpi_firmware_get_throttled: 19 callbacks suppressed
[Tue Sep 28 07:27:48 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:27:58 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:28:17 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:29:11 2021] rpi_firmware_get_throttled: 20 callbacks suppressed
[Tue Sep 28 07:29:11 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:36 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:33:06 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:33:06 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:12 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:37 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:34:15 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:34:15 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:50 2021] Voltage normalised (0x00000000)


I understand that at undervoltage it throttles the cpu performance just like when its overheating over 80C but does this actually hurts the device any way?

I hope there will be some voltage stabilization built in the RPI5 because this is just so common for others too.

pidd
Posts: 2603
Joined: Fri May 29, 2020 8:29 pm
Location: Wirral, UK
Contact: Website

Re: Will undervoltage ruin the device

Tue Sep 28, 2021 5:51 am

It would be wise to fix the root cause, there is always a risk to your file system if a computer is misbehaving.

GlowInTheDark
Posts: 2035
Joined: Sat Nov 09, 2019 12:14 pm

Re: Will undervoltage ruin the device

Tue Sep 28, 2021 7:28 am

I think the short answer to the question is: No, it won't hurt the device.

But it might muck up your data.

Note, incidentally, and I don't claim this proves anything, that on a couple of my machines, I get undervoltage lightning bolts on and off during boot, but never thereafter. These are systems that have been running for years without problems once past the bootup. I reboot them as rarely as possible.
Poster of inconvenient truths.

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jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 29605
Joined: Sat Jul 30, 2011 7:41 pm

Re: Will undervoltage ruin the device

Tue Sep 28, 2021 7:53 am

klesk wrote:
Tue Sep 28, 2021 5:30 am
I have a Raspberry PI with 360 days uptime :D
Poor thing keep having this in the log:

Code: Select all

[Tue Sep 28 07:24:12 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:24:26 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:27:48 2021] rpi_firmware_get_throttled: 19 callbacks suppressed
[Tue Sep 28 07:27:48 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:27:58 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:28:17 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:29:11 2021] rpi_firmware_get_throttled: 20 callbacks suppressed
[Tue Sep 28 07:29:11 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:36 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:33:06 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:33:06 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:12 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:37 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:34:15 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:34:15 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:50 2021] Voltage normalised (0x00000000)


I understand that at undervoltage it throttles the cpu performance just like when its overheating over 80C but does this actually hurts the device any way?

I hope there will be some voltage stabilization built in the RPI5 because this is just so common for others too.
It's common for those using bad power supplies. The fix isn't to change circuitry on the Pi4, it's to fix the power supply. Which we have already done by selling our own at a very reasonable price.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Working in the Applications Team.

LTolledo
Posts: 5972
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: Will undervoltage ruin the device

Tue Sep 28, 2021 8:55 am

klesk wrote:
Tue Sep 28, 2021 5:30 am
I have a Raspberry PI with 360 days uptime :D
Poor thing keep having this in the log:

Code: Select all

[Tue Sep 28 07:24:12 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:24:26 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:27:48 2021] rpi_firmware_get_throttled: 19 callbacks suppressed
[Tue Sep 28 07:27:48 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:27:58 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:28:17 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:29:11 2021] rpi_firmware_get_throttled: 20 callbacks suppressed
[Tue Sep 28 07:29:11 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:29:36 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:33:06 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:33:06 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:12 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:33:37 2021] Under-voltage detected! (0x00050005)
[Tue Sep 28 07:34:15 2021] rpi_firmware_get_throttled: 15 callbacks suppressed
[Tue Sep 28 07:34:15 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:21 2021] Voltage normalised (0x00000000)
[Tue Sep 28 07:34:50 2021] Voltage normalised (0x00000000)


I understand that at undervoltage it throttles the cpu performance just like when its overheating over 80C but does this actually hurts the device any way?

I hope there will be some voltage stabilization built in the RPI5 because this is just so common for others too.
what are you using to power your device?
please state the make and model number, as well as the output ratings...
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Come to me with 'problems' and I'll help you find solutions"

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