I have the same issue, it worked fine after I upgrade windows with 18.10.xx something before 18.10.0830 . after I uninstalled the PSP and just installed the new one it started BSOD with AMDPSP.sys same error . we need new PSP driver to support the new 1809 . they changed the kernel and windows tries to protect it self because of wrong driver signing or something . please release new chipset or AMDPSP driver because it was not changed at all
To add some information...
Microsoft decided to change internal system timer to 10 MHz (Win 10 1809).
Probably its related to Spectre/Meltdown (aka sidechannel attack).
Did they informed anyone? No.
Is it possible to disable it?
I tried to disable useplatformclock and useplatformtick. Those values were to disable HPET times in system, but it did not changed the 10MHz timer.|
The answer is "no".
I would like to ask guys who suffer of BSODs:
Do you have HPET (High Precision Event Timer) disabled in your BIOS/UEFI?
The thing is I cannot disable it in mine, and 10MHz timer indicates its being read from HPET... If you dont have it in system or its not enabled, and Microsoft apparently did not expected this, system will for sure go BSOD...
So... I recommend to enable HPET in BIOS and try if your system will continue to crash.
I have HPET enabled on the bios, when I use Bcdedit /set useplatformclock true it enabled HPET 14.xx mhz .. but I didn't check if AMDPSP.sys installed properly with that.. are we suppose to use HPET now ? or this will start causing issues now in games and such ? they said AMD have no issues with Meltdown and Spectre , why they change things for our AMD ?
You dont need to enable useplatformclock, also its still safer to NOT enable it.
The thing is, before 1809, system used 3.14Mhz as a system timer, which is TSC. Now it uses 10MHz... and given the frequency its either HPET on lowest standard frequency, or something different I am not yet aware of.
Microsoft has been rolling Spectre/Meltdown mitigations for months now, regardless if it was AMD or Intel - in some cases patches were retracted because of terrible performance impact or BSODs.
So far i experienced some minor performance impact, some minor bugs - however each were related to precise timing.
When useplatformclock is disabled, it seems that OS allowed LatencyMON to read timing values with precision of 0.1 microsecond, but nothing more precise. (This is on Threadripper 1900x). Thats why it looks exactly like Spectre/Meltdown mitigation.
AMD Platform Security Processor - Wikipedia
If its true that AMDPSP is an arm core incorporated to a Ryzen/Threadripper platform, it is however vulnerable... If it also requires precise OS timing to run properly, again there might be a problem...
I see/read that the 1809 download has been removed (back to 1803 download), from your download link.
That link is the official Microsoft Windows download page.
Why they changed it back to April 2018 update I have no idea. Probably Microsoft will explain why they reverted back to the previous Windows installation from the October 2018 download
It is possible Microsoft will make October available again on Patch Tuesday on the 9th of this month. If not, then Microsoft will hopefully explain why. Maybe some unknown issue popped up after Oct 2 download and decided to take it off the market again until they fix it.
Thanks that explains why Microsoft stopped the Official update from its website.
kingfish gives a much better explanation as to why Microsoft stopped the Official Update download from General Discussion : Users are Reporting Lost Data After Installing Windows 10 October 2018 Update