My Dell starts heating up on the marked spot (see photo below) immediately after booting any Linux distro I tried (Ubuntu 16.04, Ubuntu 14.04, Mint 18.2, Arch). This spot is cool on Windows. Also, the other site (bottom) is cold. I don't know what device is below neither why it happens. I checked with sensors (lm-sensors) and all is below 45°C, but obviously the part here has no sensor.

Dell Latitude E5570 (128 SSD, intel i5, integrated graphics, 8 Gb RAM)

There is no HDD in this laptop. Also, this spot is hot when runnig USB live.

I contacted Dell support and was informed that it is palm rest assemby that heats up. Any idea on how to fix it?

  • It seems to be the HDD, see the manual page 12. How to lower the HDD temperature might help you. – dessert Aug 21 '17 at 6:49
  • 1
    There is no HDD. Only SSD. – sawic Aug 21 '17 at 6:56
  • There is no palm rest "assembly" either. The palms rest on the enclosure, that's the palm rest, just plastic. What matter is what's inside right below that spot. I suggest you turn it upside down and check what's there. I suspect you'll find a removable cover and the SSD inside. SSDs do heat a lot sometimes. – user692175 Aug 21 '17 at 10:33
  • Could you post the output of sensors anyway? – Andrea Lazzarotto Aug 21 '17 at 11:07

By default, Linux writes to the disk every time a read operation is carried out.

You could try disabling atime and diratime on the mounted disk to see if it helps.

Open /etc/fstab and find the mountpoint and add "noatime" and "nodiratime" to the row.

The row usually looks something like:

UUID=DriveIDStringHere /               ext4    errors=remount-ro,noatime,nodiratime 0      1

Disabling this might also prolong the longevity of your SSD.

  • But when booting USB live, this should not be a problem. Right? – sawic Aug 21 '17 at 7:43
  • 1
    @sawic Not necessarily. If the SSD has a swap partition the live session will use it. – user692175 Aug 21 '17 at 10:34
  • “every time a read operation is carried out” Doesn't Ubuntu use relatime by default? – Andrea Lazzarotto Aug 25 '17 at 13:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.