I have a 5540 win10, a 5530 win10, a 5530 linux, a 5540 win11, and a 5560 linux.

I have seen all the other, unsolved, posts on this topic - hopefully I can add a little more info.

My Precision 5540 ( win10) stopped charging over the usb c dock quite awhile ago.  Tried updating all the drivers for everything.  None of my home docks would charge it either (in total tried 4 or 5). IT tried to talk to Dell, they gave us the runaround. Needs a new motherboard, weeks without laptop etc... Which weeks without my work pc is unacceptable. 

I found the plug in AC first, then dock workaround to charge and said I could deal until he got it sorted.  Well, it never got sorted and now the laptop is out of warranty. 

A month or so later, my home 5530 (Windows 10) stops charging over any of the docks.  Very suspicious.  It's already out of warranty.  

I suspect either Dell pushed out a FW update, or Windows pushed out an update which wrecks the USB C power negotiation for the USB chip on the MB, which is why it's a MB replacement.  

Can we seriously not have a patch for that? 

My Linux laptops are having no charging issues, and the 5540 with Win11 is not having any charging issues.

Now my 5530 with Windows has stopped recognizing *any* of the authentic, proper AC chargers and will not even slow charge that I have.  Battery health allegedly fine per Dell diagnostics.

I have seen these unsolved posts also, and tried every driver uninstall, reset etc until the battery was too dead to do anything else.

Bad AC port you say?  Well if I remove the battery and plug the adapter in, the laptop powers up fans and all!  ...briefly.  and then powers itself right back down.  So bad port I think not.  Bad power management chip or bad firmware or bios update which is breaking charge/power management?  (Or intentional, planned obsolescence... Which is a different conversation 🤬), maybe.

Has anyone else had this or can someone explain the updates to me so I can roll back to a working version, or (ugh) try updating to win11 (apparently by charging a battery in ANOTHER laptop and swapping into the dead laptop....). 

I am regretting a lot of PC buying decisions rn....