HP 450 G9 Error DMA Protection

[pthompson66]

Dan88gz, we use Bitlocker and yes, you will see that Bitlocker recovery screen if you make changes to the BIOS. I recommend either turning off or disabling Bitlocker prior to making any BIOS changes that  will prevent the recovery screen from popping up after you make any changes. 

[techbbh]

We have changed the BIOS settings in all G9 laptops we have, so far no blue screens.

[cord-53]

There was a new BIOS update in the HP support assist to 1.14 (it may have popped up over the weekend) that covers Intel converged Security and Management Engine, Camera Controller, and Click pad controller. I am hoping this is the fix, I have not tested it yet but worth a try to check out

[AdamWT]

It appears from early testing the new bios update does NOT fix.

[techbbh]

Thats good to know. I tried to install it on one device and it keeps failing. I wanted to try it on a few devices to start to see if it helped

[curleys]

Boooo, I was just coming here to ask if anyone tried the new bios yet and had any luck.

we have about 3000 440 g9's accross the fleet, staff and student and almost all are having this issue. Mitigating the crashing has been at least seemingly successful by turning off both virtualization options as well as the DMA protection in the bios as other have suggested but obviously that's not a great solution (not to mention it requires typing bitlocker keys in upon the next boot).

All my affected machines are on either bios revision 13 or 12 from december and september 2024 respectively. My machines are a mixture of win 10 and 11, some entra/intune (staff) controlled and some AD (student).

[BHCAg]

We have tried disabling DMA and the virtualization options, rolling back the Realtek drivers, and updating to the new BIOS and nothing seems to work for us.  We have hundreds of these computers in our company doing this, WIN 10 and WIN11, and we haven't found a proper solution yet.

I did put a few tickets in with HP weeks ago, but they won't confirm or deny there is a problem.  My last active ticket is currently on Hold with no response.

[techbbh]

We have not had any problems with blue screen so far after disabling  Virtualization based bios protection (in sure start), VTX, VTD and DMA in the bios settings. After those are disabled you may want the drivers the be fully updated again  

[Dans-IT]

From my experience, disabiling the BIOS items does not fix the issue. Maybe temporarily if at all.

Switching to Lenovo and never looking back. lol

[techbbh]

How long did it prevent the blue screen from happening?  its been a couple weeks and have no reports of blue screens yet