Dell Command Update not rebooting if needed

Hi there,

maybe someone can offer some advice or a solution.

I am having a problem for some time now using the Dell Command Update. When rolling out new devices in our company, we initially use DCU to get the laptops up to date. DCU is triggered via commandline using the following command:

C:\Program Files (x86)\Dell\CommandUpdate\dcu-cli.exe /applyUpdates -silent -autoSuspendBitLocker=enable -reboot=enable -outputLog=C:\Temp\DCUOnline.log -updatetype=firmware,driver

In the last few years this worked great and with no issues, but for 4 months or so, I am facing the issue that the automatic reboot is not working - or at least not all the time. For example the Intel Iris graphics driver. When I am checking the logs everything's looking good, DCU downloads the update, installs it and exits with "exit code 14" (needs a reboot to finish the update according to Intel's website). But that reboot is never happening, DCU is stuck in the screen where it says "Installing Intel Iris...".

Last few lines from the log:

Could there be a problem in the communication between the Intel Iris installer package and DCU? I am also experiencing similar with other Intel drivers (like Intel Management Engine Component Installer, there isn't even a exit code in the log, the last entry is just the path of the DellInstaller_x64.exe).

The "stuck" screen looks like this, the bar is loading but it won't do anything:

Weird enough; I see that the drivers are installed (up to date on the system, even though DCU is stuck at "Installing")...

We also use another command for the BIOS updates with the "-reboot=enable" switch, so I assume it should be working with the other updateTypes too? It is also not some specific model or series, where the updates don't work.

Let me know if I should provide any further information.

Thank you in advance!