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New question #706350 on Ubuntu-Certification:
https://answers.launchpad.net/ubuntu-certification/+question/706350

Hi,


I have installed this morning Ubuntu 22.04 LTS on a brand new Dell Latitude 5431.

I thought I'd contribute some feed-back if that's welcome :)


Intel integrated video controler:
---------------------------------------------------
After logging into Gnome after the installation, the whole desktop was very unresponsive, sometimes requiring 1 or 2 seconds between a keyboard or touchpad input and the corresponding visual feed-back to occur on the screen.

After some googling around and experimentation, I found that setting setting the i915 module parameter enable_psr=0 solved the issue. i.e the system became normally responsive.

I found the solution here:
https://bbs.archlinux.org/viewtopic.php?id=279104


touchpad
--------------

On several occasions, the touchpad stopped working completely.

So far, disabling and re-enabling it again seems to bring it back, when using X11 at least:

# this gives me id 11
xinput | grep Touchap 

# I then use as argument here:
xinput disable 11
xinput enable 11


I found the solution here:
https://www.dell.com/community/Linux-General/Dell-5431-Touchpad-disabled-or-freeze-Ubuntu-20-04-Ubuntu-22-04/m-p/8360070#M18225


fan
----

I've not solved that one, I see some worrying warnings in the dmesg output like this one:

dell_smm_hwmon: unable to get SMM Dell signature

Trying to force to load it works:

sudo modprobe dell_smm_hwmon force=1

But when launching some CPU intensive comutation, I see my CPU temperature rising from like 30deg up to 70deg without the fan ever starting (I stopped the test at that point)

This is still stopping me from using this laptop as a reliable solution since I find I could very well burn it if  I'm using it too much :( 


Any suggestion about that last one is welcome :) 



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