HP 450 G9 Error DMA Protection

[Dan88gz]

I have started having this issue starting this week on a handful of our users laptops too.  The thing in common is that they are G9's and on BIOS version U85 Ver. 01.13.00  The device will BSOD and then show the same DMA error previously mentioned by others

Is it an issue with this particular bios version?  Any actual fix yet apart from disabling options in BIOS?

[STIT]

BIOS settings was the only fix I could get to work and HP acknowledged a problem but not that they're working on a fix. I just made a step by step instruction and sent out. 

[STIT]

@techbbh, I have had it happen on ethernet. 

[Dan88gz]

i assume that when you apply these BIOS setting changes it is normal to see the bitlocker recovery screen afterwards? is that just a one off once you enter your recovery key?

[techbbh]

When we imaged our laptops we did not use a microsoft account so bitlocker was never turned on. However after I applied the BIOS settings changes the C drive now has an unlocked lock symbol and  a yellow caution sign. I checked and we still have Bitlocker turned off. I just reverted the BIOS settings back to the original ones and the bitlocker symbols are gone. When turning off VTd and DMA protection only on BIOS (not turning off virtualization based BIOS protection) the bitlocker symbols also appear

[techbbh]

We reverted one machine with a clean image we made from the summer of 2024. It has BIOS version U85 01.12.01 7/31/24. it was upgraded to windows 11 and so far have no issues with blue screen. Now it could be that it just hasn't happened yet but we are doing the BIOS settings changes for now and hoping to clean install windows 11 in a couple of months after users back up data. We have found no correlation between driver versions and blue screen we rolled back and used driver verifier on the common drivers for the e6 bugcheck 

[Dans-IT]

I'm curious to know who here is running Windows 10 vs those running Windows 11. We are making the migration to Windows 11 this summer. Almost wonder if manufacturers abandoned making proper drivers for Windows 10 long before it's retirement.

[STIT]

@Dans-IT. We had a mixture of 10 and 11 and I didn't see any preference to which was having issues. I suspect it came in on an update but couldn't find a definite correlation between installed drivers on the ones I checked. I also had around 20 some that did not report an issue.

[techbbh]

So far we have only seen it on windows 10 but we don't have very many g9's on 11. We have around 70 g9's and it has happened between 10-20 of them. We also have about 80 G8's and have not seen the problem in any of those. The difference we saw between them was that the wifi card and drivers on the G8 are intel and Realtek for the G9 which is why we thought the wifi/bluetooth driver was at fault. Looking at the the G9's with 11 and 10 they both seem to have the same drivers. We are suspecting it is the bios firmware from 11/22/24 which is version 1.13. This is about when we first starting seeing the problem. I am going to look at a few that have not blue screened to see what version of bios they have and to compare drivers. The number of devices affected seem to be growing each day though. 

[LyraT]

There is another thread open with the same issue.

Someone added a post saying that running a scan and restoring windows repair to find corrupted files could work.
Sfc/scannow
DISM /Online /Cleanup-Image /RestoreHealth

Anyway, just started disabling the DMA protection and the Virtualizations and so far no issues. Initially I did everything that was mentioned by other users. Rolled back drivers, windows updates but nothing worked, until the Bios changes.