Unsolved
1 Rookie
•
7 Posts
1
110
March 20th, 2026 18:38
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:




DELL-Daniel V
Community Manager
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219 Posts
0
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.
GasparVardanyan
1 Rookie
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7 Posts
0
March 20th, 2026 22:41
@DELL-Daniel V
Ok, thank you.
GasparVardanyan
1 Rookie
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7 Posts
0
March 20th, 2026 22:42
fwupd doesn't have the 1.29 version
olcay.evren
1 Rookie
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3 Posts
0
March 21st, 2026 08:22
Same issue
Fedora Linux 43 (Workstation Edition)
Dell Inc. Dell 15 DC15250
Bios 1.5.1
GasparVardanyan
1 Rookie
•
7 Posts
1
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