Unsolved

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7 Posts

110

March 20th, 2026 18:38

isHighlyActiveTopic

Latest UEFI firmware update broke the automated fan control of Vostro 15 3530

Hi! I'm on Arch Linux. I've recently updated the UEFI firmware with fwupd. After update when I boot my laptop UEFI decides whether enable or not the automated fan control based on the current cpu temperature and never changes it.

So when I boot and temperature is around 40deg, the fan doesn't start no matter how much hotter cpu gets.

When it gets over 95deg, I reboot my laptop. Fan starts at full speed and never stops, even when cpu temp goes below 40deg. It's always at full speed until I reboot, and the same cycle goes on...

After the UEFI update I have this in /sys/class/dmi/id:
```
    "bios_date": "12/24/2025",
    "bios_release": "1.28",
    "bios_vendor": "Dell Inc.",
    "bios_version": "1.28.0",
    "board_name": "0R7GVP",
    "board_vendor": "Dell Inc.",
    "board_version": "A00",
    "product_family": "Vostro",
    "product_name": "Vostro 15 3530",
    "product_sku": "0C32",
    "sys_vendor": "Dell Inc."
```

For example right now my dell_smm hwmon values are:
```
    "fan1_input": "4842",
    "fan1_label": "",
    "fan1_max": "5800",
    "fan1_min": "0",
    "fan1_target": "5800",
    "name": "dell_smm",
    "pwm1": "255",
    "pwm1_enable": "1",
    "temp1_input": "40000",
    "temp2_input": "32000",
    "temp3_input": "28000",
    "temp4_input": "18000"
```

Furthermore I can't enable manual fan control:

According todell_smm docs writing 2 to pwm1_enable should enable the UEFI fan control, but it doesn't work.

Neither Quiet nor UltraPerformance thermal modes don't help.
Currently I have:
$ sudo cctk --ThermalManagement
ThermalManagement=UltraPerformance

And:

Community Manager

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219 Posts

March 20th, 2026 22:22

Please see this thread here. BIOS versions 1.27.0, 1.28.0, and 1.29.0 have been pulled from our website. I don't believe you'll be able to downgrade to 1.24.1 if already on those later versions.

Contact GHN (Get Help Now) on right. This must be done to create a Dell case tied to the unique computer Service Tag number. For this specific issue, out of warranty customers will be assisted by the GHN technical support team


* Push through the GHN AI questions until it sends you to a GHN agent
* Once connected to the GHN agent, explain the issues you faced after installing BIOS 1.27.0/1.28.0/1.29.0. Ask the GHN agent to look up Dell article 000423130 for assistance. 

isGoodTroubleshootingisProTip

1 Rookie

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7 Posts

March 20th, 2026 22:41

@DELL-Daniel V

Ok, thank you.

1 Rookie

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7 Posts

March 20th, 2026 22:42

fwupd doesn't have the 1.29 version

1 Rookie

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3 Posts

March 21st, 2026 08:22

Same issue

Fedora Linux 43 (Workstation Edition)

Dell Inc. Dell 15 DC15250

Bios 1.5.1

1 Rookie

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7 Posts

March 21st, 2026 19:17

@olcay.evren​ Dell released UEFI 1.29 which seems to fix this bug introduced after 1.24 and forgot to push it to fwupd

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