Question XPS 15 (9550) System lockup/Freeze after BIOS update

[LastDitch]

My 9550 was on its original BIOS from 2016, I think it's (01.02.10), everything was running just fine.

The issue began after I let SupportAssist update a bunch of things, and among them was an update to the latest BIOS released about a week ago (1.11.2).
After the update my system now freezes randomly and I have to do a hard-reset each time.

Here is everything I did to try and fix the issue that did not work:

• Reset BIOS
• Downgrade to older BIOS, even to the original one I had. It will say update failed (because of Intel ME), yet the BIOS version number changes in system information.
• Wipe everything and install Windows again (from recovery partition).
• Wipe everything and install Linux (Pop os).

Other notes: I noticed the issue is less frequent when AC is plugged in, so I disconnected the battery from the back but it still freezes. I also suspected it could be an SSD issue so I tried booting from a Live Linux USB and the system still freezes.

Any advise on this is really really appreciated as I'm very desperate to getting this fixed.

 

[monkimind]

OK, do you have a fusion drive, or just an ssd? I had intermittent bsod issues until I went into bios and disabled the raid option for disk management (changed to ahci) You can't do this if you have a fusion disk as the HDD and SSD use raid. but if you have ssd only (or hdd I suppose) you can reset bios to disable raid and use ahci. I had done this on my system and a bios update reset the default to raid. This may help. I had to use windows driver verifier repeatedly to test solutions with dell tech support. This is the one that finally worked.