XPS 13 Plus 9320, turns on after shutdown

Same problem - pulled my laptop out of my bag, it was piping hot. Computer does NOT shut off!

I followed VCSLTD84 instructions - downgrading BIOS and the problem solved. This is much helpful while we wait for Dell's release of a new BIOS update. It is not just a problem of system restarting, but the battery drain and also the XPS becomes very hot if we do not notice that it is on. Following the link  VCSLTD84 provided and click on ‘Download current version instead’ to download the right file ‘XPS_9320_1_6_0.exe” (the page recommends you to ‘Go to the latest version’ but ignore this).

Please note that after downgrade BIOS, you need to disable the Automatic BIOS Update, otherwise it automatically updates BIOS and your XPS 13 Plus continues to restat whatever you do with configration for the lid. Right after downgrading your BIOS, when your XPS works normally (you may try to shutdown once), restart your system (or turn it on if you shutdown), and press F2 during booting to go to BIOS Setup. Click Update…, and put the UEFI Capsule firmware updates to Disabled, click Save Changes and Exit. Your system restart and things solved. Before Dell releases a later BIOS update that solved the problem, be careful using SupportAssist to scan for drivers update or so, as you may update the BIOS to the trouble version.

Interesting problem.

Does the machine still seem to be reading the status of the display open/close switch properly?

If so, I wonder if this new firmware defaulted some BIOS option to ON, that most people normally keep OFF (like maybe Intel Ready Mode, etc.) 

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I don't think that's the issue. There is a BIOS feature where opening the lid can trigger the PC to bootup but that should mean the PC should begin to boot when you open the lid (the PC should not already be on).

Thank you for this! We shall wait until better firmware fixes this issue.

Users with 1.7.1 BIOS installed =
* Enter The BIOS
* Go to Power
* Click "LOAD DEFAULTS" button
* Go to Lid Switch
- Is "Enable Lid Switch" set to ON?
- Is "Power On Lid Open" currently set to ON?

Users with 1.6.0 BIOS still installed =
* Enter The BIOS
* Go to Power
* Click "LOAD DEFAULTS" button
* Go to Lid Switch
- Is "Enable Lid Switch" set to ON?
- Is "Power On Lid Open" currently set to ON?

* Launch CMD as Admin
* Type CD\ [press Enter]
* Type powercfg /spr duration 28 [press Enter]

Send the completed HTML sleep study report to GHN agent via one of their previous sent private messages.

I am on 1.7.1 and loaded "BIOS defaults" when I checked, both settings were on. I will PM you my sleep study file.

Joined this thread as I have the same problem.  I did not know it was possible to install BIOS on battery power alone:-) but I may well have installed it while in its Dell Dock so I decided to followed the advice above.  I had BIOS 1.7.1 installed.

* Connect the provided external power adapter to the Laptop <
* The Laptop is not connected to any dock, external monitor, printer, drives, etc. <
* Download/save BIOS 1.6.0 to the Windows Desktop <
* Download/save BIOS 1.7.1 <ADMIN NOTE: Broken link has been removed from this post by Dell> to the Windows Desktop <
* Right click BIOS 1.6.0 and Run as administrator <
* When done, the Laptop will restart <
* Once back on the Windows Desktop, right click BIOS 1.7.1 and Run as administrator << 7.1 " I saw weirdly as I had not run the 1.7.1 installer!  Out of interest I restarted and sure enough it installed 1.7.1
* When done, the Laptop will restart < In Lid Switch   "Enable Lid Switch" set to ON - Yes and  "Power On Lid Open" currently set to ON Yes and the let restart continue. 

Hi, thank you for loading BIOS to defaults. The sleep study will not show a restart after a shutdown. We would request you to downgrade the BIOS to observe if the issue resolves and then you can upgrade the BIOS back to the latest.

We will then use this information to reach out to the engineering team for further review.

Yep exactly the same here, will follow instructions but you would have thought an organisation of Dell's size would have tested thoroughly and resolved the issue a bit quicker.

"We would request you to downgrade the BIOS to observe if the issue resolves." Downgrading does make a difference:-) under my "old" 1.7.1 install when the PC shut down and all lights went off the power switch had no effect, either short or long press, it just sat there doing nothing and then in in its own time ~20+ seconds it would start up again with no input. 

I noticed when I down graded to 1.6.0 immediately after it shut down/lights out (call me inpatient if you like!) I touched the power button the keyboard lights came on and it booted.  Does that help?

I can downgrade again and run the report requested if it is really needed, will just need a day or two to do it.  Thanks, Peter

Replying back to say I still have the issue and I've said this to "DELL-Cares" in PM as well. (as well as there being ALL of the people on this forum who have this issue)

I dont know if this help.

But just let your guys know i have the same problem.

I've follow the instruction given above by...
1. Plug in power, do not use battery.

2. download 1.6.0 firmware, run as administrator. And flash it.

3. i press F2 , goes to firmware setting =, make sure Enable Lid Switch" set to ON - and "Power On Lid Open" 

4. i don't know why, once i finished downgrade firmware to 1.6.0. 

It forced reboot and started to flashing firmware again.

When it is done, i go to windows and check firmware.

It just goes back to 1.7.1.

But once i shutdown my PC. It won't turn back on again...
Problem solved ?

PS. in BIOS, i pressed "loading BIOS to defaults" as well.
But i didn;t mess with any setting in BIOS.

Just set maximum battery charge to 85% (Try to extend battery life)