acpi ucm ucsi 43 error code, no more battery charging

[zenographie]

After a series of software and firmware upgrades, my 840 G5's battery refuse to be charged using the HP USB C power adapter. 

In the device manager, the USB connector manager shows a "acpi ucm ucsi" code 43 error (windows closed this device) 

The battery could be charged using the "plain old DC connector" or the 1300 slim dock station. 

After a call to the customer support -without any real technical explanations, the HP maintenance service decided to ship a new PSU wiith a 4.5mm connector. Thanks guy, but the original PSU works perfectly well, and this option won't solve the ACPI errror. 

Another call to the customer support later, the person in charge sent me a "bios upgrade" patch... in fact, it was a "bios downgrade", (01.06.00 firmware , the installed version is 01.09.01). I'm probably too paranoïd, but I think that new bios versions are generaly released to patch security issues. Downgrading my Bios is out of question. 

Could someone give me some technical advices to solve this "code 43" error and bring back to life my USB management (and charging capabilities) ? 

Thanks for reading

Mark

[zenographie · Accepted solution]

Answer to myself : problem solved

I "downgraded" the bios with version 01-06-00 and re-upgraded with version 01-09-01 and my acpi ucm ucsi driver came back to life, allowing the battery to be charged via the usb-C connector. 

if the problem remains, it could be necessary to check if the Microsoft -kb4512578 patch could not be applied. 

I think that applying directly the 01-09-01 bios code could have the same effect