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Laptop in title has Ubuntu 18.04 installed and after installing the latest update yesterday (9.7.2018) fan(s) were running continuously. I have proprietary NVIDIA drivers installed and until yesterday everything worked fine.

After inspecting temperatures, I compared them to a similar setup (samo brand and model and Ubuntu 18.04) and mine were relatively high and the same goes for fan speeds.

> sensors
dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 4104 RPM
Video Fan:     4100 RPM
CPU:            +62.0°C  
Ambient:        +60.0°C  
Ambient:        +56.0°C  
Other:          +39.0°C  

acpitz-virtual-0
Adapter: Virtual device
temp1:        +25.0°C  (crit = +107.0°C)

pch_skylake-virtual-0
Adapter: Virtual device
temp1:        +57.0°C  

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +60.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +58.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +59.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +57.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +57.0°C  (high = +100.0°C, crit = +100.0°C)

This is the other laptop which works as expected:

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +52.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +52.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +52.0°C  (high = +100.0°C, crit = +100.0°C)

acpitz-virtual-0
Adapter: Virtual device
temp1:        +25.0°C  (crit = +107.0°C)

dell_smm-virtual-0
Adapter: Virtual device
Processor Fan: 2514 RPM
Video Fan:     2504 RPM
CPU:            +56.0°C  
Ambient:        +50.0°C  
Ambient:        +48.0°C  
Other:          +36.0°C  

pch_skylake-virtual-0
Adapter: Virtual device
temp1:        +52.0°C  
4

My guess is that something has been done with the graphics drivers. Until this is fixed, an intermediate solution is to switch to onboard graphics (see here). In short, run nvidia-settings and select PRIME Profiles and use Intel (Power Saving Mode).

This is the image from the link: enter image description here

You should see the change in Details enter image description here

  • fixed the same problem for me! – Guangliang Jan 19 '19 at 1:49
  • The issue has not been resolved in 19.04. – Roman Luštrik Jun 24 '19 at 15:24
  • This continues to be a real annoyance, even with the laptop on my desk. If you look in the "PowerMizer" section of the nvidia-settings app, the performance level seems to be pinned at 2-3 (ie - use a lot of power and run hot), when for "normal" use I'd expect 0-1 to be good enough (how much GPU power do you need to throw a few flat windows around?). – Adrian Oct 21 '19 at 9:23
  • So ; for an alternate solution I tried this answer. Upside - it definitely forces the performance mode to 1 or 0, and there's a noticeable reduction in fan usage. Downside : there's a noticeable reduction in performance too. Even scrolling a webpage becomes really clunky and laggy. Now, I'm using Unity, so this might be one reason. Main reason I'm trying the nvidia instead of the Intel is that eventually (after suspending a few times) the texture memory fragments and it grinds to a halt and needs a reboot. askubuntu.com/questions/1061919/… – Adrian Oct 21 '19 at 9:37
  • 1
    .. and back to the Intel GPU, and everything is as smooth as silk again. Something very wrong when integrated graphics outperforms a dedicated workstation-level card on basic desktop compositing. – Adrian Oct 21 '19 at 9:47
0

Install i8kutils:

sudo apt install i8kutils

Follow the guide How to solve Dell laptops fan issues in Ubuntu.

  • 1
    Thanks for your input. I have thought of this solution, but I opted for switching to onboard graphics until this issue is solved on the level which was broken (kernel? graphics drivers?). – Roman Luštrik Jul 10 '18 at 11:20

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