new Z2 G9 system, windows 11 freezes throughout the day

[LarsHansenED]

Disabling services did not affect the issue (All HP Services remain disabled).

The PC has an uptime of 8 days and it happens often now. Especially when I lock on after a day it is 100% sure the first logon leads to a lagging session but even if I just lock the PC shortly (which takes something like 6 seconds to complete) it seems slow often when I log back in. The longer I was away it seems the more likely immediately lag/latency issues are when I log back on. I considered it might have been group policies but event log data does not correlate with slowdowns - there are a huge amount of firewall info being logged to the security log, but it is so much that I cannot see if its more in those peaks or not.

Every once in a while when I work there are then serious lag/latency issues. Feels much like if you had a bad Chipset driver and you are copy files between storage devices and the UI starts lagging severely (just describing how it feels). 

I had a slowdown while working, not related to when I log on, and I did make a note of the time so seeing if this is every 15 minutes or not. I think there are also some variables to consider there for instance what if a log on (no reboot) just from the lock screen might reset that. Ok, right when I wrote the last sentence, about 15 minutes after the last slow down I just started lagging to the keyboard buffer got delayed and I could not move the mouse (so there might be something there since someone else in the thread also had this with 15 minute intervals (btw it just happened again in this sentence). There was 2 CPU spikes on cores 4+6 but that is still just under 5% of the total CPU load on the system (I am wondering if some threads are stuck on single cores which go to 100% and those create process queues).

I am going to install a Datadog monitoring agent on my PC and try to see of there are process ques building when there are slowdowns.

[wthe]

Other steps I did. I should state that I no longer have an issue. The reason I mentioned disabled the HP software is because that was the last thing I did and it resolved the issue. But I suspect now, given you still have the issue, that it might be a combo of things. Looking at my services now, I see HP have somehow enabled several services again. I do however have the following still disabled 

HP analytics 

HP CASL

HP DSU

HP Services Scan

HP SFU

Now onto the other things I did prior to disabling the services to resolve the issue on my system. I disabled power saving modes in windows and I also did the same for several settings in the bios. I also switched my logitec mx master mouse from using it's usb thob to Bluetooth as I noticed having a wired mouse seemingly made the issue OK but thinking of it now I can't be sure. Nonetheless, I am keeping it as is.

[LarsHansenED]

Looking into power saving settings and also the BIOS is also stuff I want to try. I am running the PC on this "Ultimate Performance PC" setting assuming there is not that much power saving configured there but I will dig into the configuration further. BIOS I will do somewhat later since a restart is problematic with all the tasks I have going on at the moment.

In any case I can confirm there is about 15 minutes between the issues which often repeat in series of 2 lags within 30 seconds of each other. Some are very serious where the computer is totally frozen for maybe 30 seconds.

If I find the culprit I will return here and also check if there are more suggestions. Thanks for the help and feedback so far - it gives hope that a solution is possible.

[Nexus_Ben]

I have the same issue.  HP Z2 workstation freezes for a few seconds.  Then resumes.  all local processes freeze.

Has anyone tried reinstalling windows from scratch without any of the HP software.

This will be my next step.

[LarsHansenED]

@Nexus_Ben

Just letting you know that I am still monitoring this thread and I did some work on the issue yesterday. I already did disabled all the Hp Services in "services.msc" which did not affect the issue that appears every 30 minutes synchronized with the time so 1500 1530 1600 1630 and so forth. It also happens when I log on or return to the PC after it having been locked.

I tried disabling scaling in Windows since I have a mix of monitors and one is 5K the others are a different format. Reason was than when the problem is there, other than the lag or complete freeze I see windows going in an out of focus without it being a part of the input lag buffer of the peripherals.

Anyways to my point. I have this software "DPC Latency Checker". Its used for seeing if your PC is fit for video playback as it helps detect latency due to driver issues. Perhaps it deals with problems with interrupts or DMA but honestly I don't know. What I do know is that every time I started this software the mouse would lag as it entered administrative access / escalated privileges. Looked related to the issues and it was something that would happen every time. The progam itself displayed no lag issues other than the usual bad latency on 13th gen Intel CPUs due to architecture change over older processors.

This is my work PC and my colleague has one just like it. Both Windows 11 are fresh installs with no fancy add ons. They are 13900K with 64GB of memory. We both had the issues but his just went away after disabling HP Services in "services.msc". This is also something others managed to do and fix their issues here in this thread.

Others went further than that and went into BIOS pressing F10 at startup. Here disabling features that had to do with power saving. I removed "Runtime Power Management", "Extended Idle Power States", "SATA Power Management" and "PCI Express Power Management", also I disabled all remote management access (one requires you to enter a pin upon restart but it was displayed on screen what that was". This is of course because my problems persisted after disabling the HP Services in service.msc.

Now I am still testing and I did do this yesterday. Restarts remove the lag for a while so I cannot definitively say if the problem is resolved before some time has passed. However, what I can say is that "DPC Latency Checker" does not stutter and starts faster everytime and my logon this morning went faster. So some stuff is better. If I do not see more lag in a couple of days I will write in here and that means I "solved" my symptoms. 

Obviously I disabled a lot of features that I paid for, and you might not be allowed to change those things unless you manage your own PC (its all your own responsibility). But, at least you know. Also, if this works it is likely just one of those things that I disabled that is the root cause for the issue then or at least the thing that sets it off. To know more, I would have to restart and try restart and try which I do not really have time to do right now but might do over months... 

I hope this helps you out. If anyone finds more precise of better solutions please share.

[LarsHansenED]

Sorry to say that after disabling the things I mentioned in my previous post the problems are starting to reappear after about 1 days operation of the machine. The expectation will be that it will get worse and worse the longer the PC has not been restarted (right now the freeze might be a few seconds, and jiggery input like a serious lag in a game). 

I also tried upping the video card buffer in BIOS, forgot to mention that.

DPC Latency Checker, when I start it now, also produces the same Lag and I think that lag is there every time I want to "Run As Administrator". It also seems to be a bit slower overall actually. 

And still, nothing is measured with the monitoring tools I have. No big process queue on CPU, disk latency, CPU load, lack of memory etc. 

I am starting to think this is simply just a badly designed PC or something with a very poorly tested BIOS / Driver suite.

[wthe]

Not sure what video card you have. I use mine for work and changed the video card but it isn't a gaming card. For the freazing I just disabled all hp services,disabled all windows power saving modes,disabled bios power saving and switched my mouse to Bluetooth over it's USB dongle. All freezing issues resolved. My pc is shutdown every day so not sure about latency related to accumulated runtime (that could be a windows\driver bug)

[Gwandoya]

I noticed the freezing every 15 minutes again a few days ago. Sure enough, some of the HP Services had been re-enabled. Disabled them and the problem went away. Amazing that nobody at HP has caught on to this issue.

To be clear, this only fixes the specific issue of freezing for 2-3 seconds every 15 minutes. I haven't experienced any other problems described in the thread such as general input lag, etc.

[wthe]

Disable all hp services. I also disabled power saving settings.

[Z2FREEZES]

We've totally reformatted and rebuilt one of the PCs from scratch without the HP software. Its still freezing which leads me to belive the hardware is either faulty or hardware confliting with a driver or software.