SFG14-42 stuck in low frequency after boot

rand0
rand0 Member Posts: 4 New User

Hi there,

my SFG14-42 is stuck at around 500 MHz when starting if the battery is at 20% or below. This is reproducible and can be resolved by plugging in the charger. It is independend of the govenor that was set before shutdown or the OS.

It appears like the issue is in the BIOS (1.06 installed).

Has anyone else observed this strange behaviour?

Answers

  • Puraw
    Puraw ACE, Member Posts: 13,541 Trailblazer

    Yes, the system is throttled by the Power Plan settings and Windows Battery Saver logic. Always leave the power adapter plugged-in and the battery fully charged, there is nothing to be gained unplugging the adapter. Changing BIOS S1-S5 settings and/or Advanced Power Plan settings will result in unexpected behavior like BSOD or unable to wake the system from sleep.

  • Did this problem occur right after updating the bios?

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  • billsey
    billsey ACE Posts: 34,313 Trailblazer

    That throttling is done by Windows, not by the BIOS. Check in power options for the limits that are set and adjust as appropriate to your usage.

    Click on "Like" if you find my answer useful or click on "Yes" if it answers your question.
  • rand0
    rand0 Member Posts: 4 New User

    I don't know, because I updated right after I got the device.

  • rand0
    rand0 Member Posts: 4 New User

    Umm, yeah, well. That's not how it works…

  • rand0
    rand0 Member Posts: 4 New User

    No, that is not related to Windows. This also happens after using Linux ;)

    But maybe I did not make that totally clear. This happens right at startup before any OS is involved. The green Acer logo usually appears instantly after pressing the power button. But when the battery is below 20%, even this logo takes several seconds to show up.

    Also disabling the power limit in Windows/Linux does not affect this behavior. That's why my guess is the BIOS.

  • danielsf9405
    danielsf9405 Member Posts: 5

    Tinkerer

    Yeah I can confirm the same issue, the exact same issue that you describe. I am running bios 1.02 though so it looks like it's a bug in the in both bios versions. I really hope acer can fix this, otherwise I'll have to return this device.

  • danielsf9405
    danielsf9405 Member Posts: 5

    Tinkerer

    So I can get it to boot with normal frequencies if I reboot after the first boot at 500mhz (or even less) when my battery is low. But it is intermittent if the next boot will work or not. It hangs pre acer logo, it kinda feels like it's some kinda bios bug. Kinda reminds me of the steam deck 400mhz bug. Does anyone know of a way to get acer devs attention to help fix / debug this for others? I love this laptop, but this bug may make me have to return it.

  • Try updating your bios to this version:

    BIOS

    Update Insyde Logo fail issue patch

    Acer

    2024/02/26

    1.07

    10.16 MB

    Download

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  • danielsf9405
    danielsf9405 Member Posts: 5

    Tinkerer

    Thanks for the suggestion, unfortunately updating to this bios made no difference to the issue. :(

  • Have you checked the temperatures with hwmonitor?

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  • danielsf9405
    danielsf9405 Member Posts: 5

    Tinkerer

    edited April 22

    Hi, yep Hwmonitor shows normal temps across all sensors. Here is a video of the issue, sorry for talking so much in the video haha. It's worth adding that this issue also comes up when running on battery, with the laptop on as well when less than 30% battery

    A little bit stuck with the laptop now. Acer won't touch it as they have a repair contract with Curries. However, curries tried to repair it, claimed it's fixed and sent it back with nothing fixed. I really wish Acer would handle this as it's not a simple problem but affects the usability of the laptop drastically.

  • danielsf9405
    danielsf9405 Member Posts: 5

    Tinkerer

    Hi, yep the temps are low across all sensors when this happens according to hwmonitor. This is a video I took of the laptop a while back showing the issue. Sorry for how much I talk haha. It's worth noting that this bug can randomly appear as well when running on battery when it hits less than 30%.

    A little bit stuck with the laptop now, Acer has refused to touch it as they have a repair contract with Curries and Curries have tried to repair it and failed, now won't do much except get stuck in a loop of sending it off, doing basic tests and then coming back saying it was fixed when it wasn't. I wish Acer themselves could handle this as it's not a run-of-the-mill issue.

  • Commodore_1995#
    Commodore_1995# ACE Posts: 98,327 Trailblazer

    I apologize for taking so long to respond. Try disabling fast startup in the power options and check if the clock remains stuck

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