Ben_6489

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Ben_6489

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September 7th, 2025 14:24

BIOS Update Causing Shutdown Failure – Dell G16 7630

I own a Dell G16 7630. After applying the latest Dell-released BIOS update, my laptop will no longer shut down properly – selecting “Shut Down” causes a restart every time.

This is not a Windows or configuration issue:

  • Fast Startup is disabled.

  • Drivers, chipset, and firmware are fully up to date via SupportAssist.

  • Shutdown from both the lock screen and command line fails the same way.

  • Event logs confirm the system is receiving a restart instruction from firmware.

This issue began immediately after the BIOS update and cannot be rolled back due to Dell’s lock on earlier versions. It is therefore a BIOS regression introduced by Dell’s own update, not a hardware or warranty matter.

I will not purchase extended support post-warranty to resolve an issue caused directly by Dell firmware.

I require escalation and resolution of this problem. If Dell cannot provide a fix by 15 September 2025, I will contact my bank to initiate a recall of the funds for the laptop purchase, and Dell may then arrange collection of the device at its convenience.

Please confirm the next steps.

(edited)

  • DELL-Nat M

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    Posted October 3rd, 2025 18:44

    Dell has released a new BIOS update for the Dell G16 7630 as of today. This update is intended to address issues reported with previous versions, such as shutdown failures.


    What to Do:

    • Download and install the latest BIOS from Dell Drivers & Downloads.
    • After updating, please share your feedback in this thread. Let us know if the update resolves the issues you experienced.

    Your input is valuable to confirm the effectiveness of this update. 

    Thank you for your collaboration!

    #IWork4Dell

  • ALEXding

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    Posted September 22nd, 2025 00:47

    @DELL-Nat M​

    Issue Analysis – Shutdown Problem Linked to USB 3.1 Controller / PCIe Root Port

    After extensive testing, I’ve identified that the shutdown/restart issue is not solved by simply downgrading the BIOS to 1.22 — the problem still occurs.

    • When the USB 3.1 controller is enabled in Device Manager, the system does not shut down properly and instead restarts.

    • When I disable the USB 3.1 controller, the system is able to shut down normally.

    • Similarly, when I disable Intel(R) PCI Express Root Port #21 - 7A44, the system also shuts down normally.

    This clearly shows that the bug is linked to the USB 3.1 controller / PCIe Root Port power management in the BIOS (v1.26.1 and even 1.22).
    The affected devices are not being powered down correctly during the shutdown sequence, which causes the system to trigger a restart.

    Temporary workarounds:

    • Disable the USB 3.1 controller in Device Manager.

    • Or disable Intel(R) PCI Express Root Port #21 - 7A44.

    Impact:

    • Disabling these devices makes USB 3.1 ports (and potentially other devices on that root port) unusable.

    • Downgrading to BIOS 1.22 does not solve the issue.

    Conclusion:
    This is not a hardware defect from the user’s side, but a clear BIOS-level bug affecting power management of the USB 3.1 controller and PCIe Root Port.
    Dell needs to release a corrected BIOS version to properly fix this behavior.

  • lopezescandell

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    Posted October 2nd, 2025 11:31

    Dell G16 7630 – Shutdown Bug Diagnosed and Solved by Removing SupportAssist

    Hi everyone,

    I’d like to share my full troubleshooting journey with the Dell G16 7630, which was affected by a persistent shutdown bug. The system would restart instead of powering off, even when idle, cool, and connected to the original charger.

    Initial Symptoms

    • Shutdown triggered a fan surge and unexpected reboot

    • BIOS logs showed Thermal No POST Recovery – Method 1 Executed

    • Dell diagnostics returned error 2000:8135 (charger not detected) despite proper connection

    • Disabling USB 3.1 controller and PCIe Root Port #21 did not solve the issue

    • Downgrading BIOS to v1.22 had no effect

    Troubleshooting Steps

    1. Verified thermal and power status using PowerShell and BIOS logs

    2. Disabled USB 3.1 controller and PCIe Root Port #21 in Device Manager

    3. Tested shutdown via script: shutdown /s /f /t 0

    4. Restored BIOS to factory defaults using “BIOS Defaults” option

    5. Confirmed Modern Standby (S0ix) was active

    6. Uninstalled Dell SupportAssist using PowerShell and manual cleanup

    Resolution

    After uninstalling Dell SupportAssist, the system began shutting down cleanly. No fan surge, no reboot, no BIOS recovery logs. This confirms that SupportAssist was interfering with the shutdown sequence, likely through background services or scheduled tasks.

    Cleanup Steps

    • Removed SupportAssist via PowerShell:

      powershell
      Get-WmiObject -Query "SELECT * FROM Win32_Product WHERE Name LIKE '%SupportAssist%'" | ForEach-Object { $_.Uninstall() }
      
    • Deleted residual folders and registry keys

    • Verified USB and PCIe devices were re-enabled and functioning:

      powershell
      Get-PnpDevice | Where-Object { $_.Status -eq "OK" -and $_.Class -eq "USB" }
      

    Final System State

    • BIOS v1.26.1 (July 15, 2025)

    • SupportAssist fully removed

    • USB 3.1 and PCIe Root Port #21 re-enabled

    • Clean shutdown confirmed

    • No thermal or charger errors

    • Windows 11 Pro 23H2

    • SK Hynix BC901 SSD (firmware 5109T51)

    Recommendation

    If you're facing similar shutdown/restart issues on the G16 7630, try removing SupportAssist completely. Dell should investigate how SupportAssist interacts with BIOS-level power logic and Modern Standby.

    Hope this helps others. Feel free to ask if you want scripts or logs.

    Best regards

  • Lele92

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    Posted September 8th, 2025 21:40

    Dear Dell,

    I am experiencing the same issue after applying the latest BIOS update on my Dell G16 7630. Since the update, the laptop will no longer shut down properly: every attempt to select “Shut Down” results in an automatic restart, regardless of Windows settings or the shutdown method used.

    To clarify:

    • Fast Startup is disabled.

    • All drivers, firmware, and updates are already installed via SupportAssist.

    • The abnormal behavior appeared immediately after the BIOS update.

    At present, the only way to turn off the system is by holding down the physical power button, which is not an acceptable or sustainable solution. This confirms that the issue is caused by the recent BIOS release, not by Windows configuration or hardware.

    I therefore request a prompt resolution from Dell, as this regression significantly impacts system usability. It is essential that Dell addresses this issue as quickly as possible in order not to lose credibility and future customers, since it is unacceptable for a problem of this nature to be introduced on a laptop in this price range.

    Please confirm the next steps.

    (edited)

  • Ian_42

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    Posted September 9th, 2025 07:15

    I also have the same problem and have been through the same as everyone else trying to fix this.

    I am an electronic engineer by trade and thus write lots of code similar to BIOS firmware and let me say this is an absolute disgrace.  There is NO way this should have made it through product verification prior to release unless these problems were intended which I hope was not the case.  The fact that you have blocked the ability to downgrade this release of firmware is of concern to me, again for a company like Dell this is extremely poor.

    This is not my first experience of Dell laptops and their problems but this is the first (and possibly last) time I have owned one myself.

    On the first reset the fans max out which probably means the processor is maxed out as well judging by how hot the machine gets, this not good for the longevity of my device.  Subsequent reboots don't do this.

    My current solution is to enter BIOS after the reset and power down from there.

    As per the previous comments, this needs fixing now!

  • Thom985

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    Posted September 9th, 2025 07:59

    I have exactly the same issue as you do, it begun after i updated to the latest version of the bios, I was going crazy thinking that it could be a configuration of windows that have changed aftet the bios update but it ended up being the faulty bios that you released, i can't believe i can't turn off my pc now, also the performance have experienced a downgrade, doing multitasking, the system becomes to get frozen like the processor couldn't handle all the programs working at the same time, so i have to close one or two programs to stabilize the system, it's unnaceptable by any means cause i also tried to make a bios downgrade and i realized that you blocked the abbility to do it.

    Solve this problem as soon as you can and stop letting the people to download this faulty update before getting the same problem as us.

  • Lele92

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    Posted September 9th, 2025 12:19

    I tried to contact Dell technical support, but the call gets disconnected after a few minutes of waiting. I’m speechless. A high-cost PC that I can’t shut down without forcing it with the power button, risking damage to the operating system.

  • Ben_6489

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    Posted September 9th, 2025 14:37

    <Duplicate post merged to original thread. DELL-Admin>

    (edited)

  • Thom985

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    Posted September 10th, 2025 07:59

    You already have taken off the faulty bios from your support site but you should let us downgrade to the people that have already installed it, i have had lots of problems with my pc, is not just the fact that it restarts when i wanna shut it down but also that i can't even watch videos or listen music on my pc cause dunno what it does to the cpu that it takes it to the limit and the pc gets frozen while watching videos or listening to music, the mouse gets laggy like i was doing very heavy tasks and i can't believe a pc with such specs would get overloaded just by listening to music, so you should rename the old bios to let us get it back or do anything else to help us all with this problem.

  • DELL-Nat M

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    Posted September 10th, 2025 12:48

    Hi everyone,

    We’re currently checking on this with our engineering team. Thanks for your patience while we investigate!

    #IWork4Dell