BSOD on DAX start

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  • Problem
  • Updated 2 months ago
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For the past few months I have been getting a BSOD (due to portcls.sys) when I start DAX about 1 out of 5 times. I run DAX predominately connected to the 6600M front panel. Although I use SSDR it is not as frequent as I use the front panel so can't say for sure it has the same issue.

Flex software is the most current V3. PC is a W10 Pro version 1909, all up to date. PC hardware is Workstation with a Xeon CPU 24GB RAM.

When the BSOD happens and I reboot the DAX and SmartCAT have lost all their settings so I drop back in a backup of CAT.settings and DAX.settings to recover. 

I have been living with this quirk (as well as several other Flex quirks) but is becoming a nuisance.

Any helpful suggestions? 

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Gary NC3Z

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Posted 2 months ago

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tod-WE5TR

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Sorry I don’t have a solution.
However, could you point me to the info you found on backing up CAT and DAX settings? When this has happened to me I’ve had to restart from scratch with configuration.
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Gary NC3Z

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AppData > Roaming > FlexRadio Systems >   there are 3    .settings files there to backup.
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tod-WE5TR

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Thank you, Gary. Files saved to new location. Much appreciated.
73 WE5TR
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Arvind Mallya

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I get the same error message "page fault in non-paged area" I have sent the log to Microsoft. I'm sure it's in their que for next release of Windows
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Michael Walker, Employee

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I had the problem the other day, but it was 100% related to Audacity.  I did a re-install/repair on Audicity and the problem went away.  

You  might want to give that a try if you have it installed.


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Joe N3HEE

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I've had the same experience with starting Audacity while DAX is running. I upgraded to newer version of Audacity and all was fine for a while then I got BSOD again a few weeks ago.  Something is stepping on a driver.
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Gary NC3Z

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I do have Audacity installed but it was not running, and normally does not. How did you determine it was Audacity? 

Just checked and it's the latest @ 2.3.3
(Edited)
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Joe N3HEE

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I was recording something off of the air and when I started Audacity I got BSOD.  This has happened twice.  I upgraded Audacity and BSOD has not happened for a while.  I just checked my memory and it's fine.  
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VE3DZP

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Just last month I had the same problem. Not likely the same but try running the memory checker. It ended up I had a faulty strip of RAM. Once change al is ok, just a thought, Gary.
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Joe N3HEE

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Good idea !  I had a problem with random BSOD's about a year or so ago that was related to a bad stick of RAM.  It absolutely drove me crazy !
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Gary NC3Z

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Hmmmmm, I have used the Crucial checker, but which one did you use?

Running a check using mdsched.exe  right now.
(Edited)
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Joe N3HEE

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I use MemTest86. Very thorough testing and free. https://www.memtest86.com/

Simply boot it off of a USB key and it runs its tests.  Takes about 1 hour to run one pass on my machine. ( i7 4GHZ CPU, 16 GB RAM) 
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VE3DZP

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Not sure who you addressed your question to. I it was myself I ended up installing win 10. The mem checker is under {Control Panel-Administrative tools} you will find it at the bottom of the list. Gary VE3DZP
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Joe N3HEE

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The memory checker in Win 10 is not very thorough.  It said my memory was good when in fact it was not when I checked it with MemTest86.
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WX7Y

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I had that trouble when the last update of version 3 and 2.6 of SmartSDR, It has to do with Sound drivers between Windows 10 the base DAX driver and a hardware issue combined so it doesn't show up very often. 
Microsoft and FLEX worked together on figuring this bug out and FLEX reported it to the author of the base driver of DAX for a fix. 
This seems to happen much more often if your OS has had several sound card type programs and drivers over a few years installed and uninstalled with crap being left behind by Windows crappy uninstaller.
I had a drive crash and had to start my computer over I decided instead of using my backup I would would start fresh and sense that time I have not had the issue come back.
My computer's that did it where both Intel NUC's one version 7 and one version 8 I think that where upgraded from WIN7.
73's
Bret
WX7Y

(Edited)
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Bob Gerzoff, WK2Y

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I have had the problem when I have been running Dragon Naturally speaking and/or watching YouTube videos.  I am running 1909 with the latest SDR on a 6500.  Generally, if I am going to operate, I boot the PC and start SDR\CAT\DAX first.  Then I can start anything else I want without any hiccups.
73,
Bob, WK2Y
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Rich McCabe

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I have same issue. Do not have Audacity installed. I trying installing SmartSDR on a new notebook I use when I am out at clients locations and it started blue screening as well.  Tim has been on both machines using Teamviewer and never could resolve it.  I had to get SSDR off the notebook as it would take about 3 or 4 bluescreen boots before I would finally get into windows.

It rears its ugly head on occasion on the shack computer but not as often as it used to.
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Andy M5ZAP

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I have the same portcls BSOD on initial PC boot. If I uninstall SmartSDR the problem stops. Reinstall it and the problem returns. I sometimes have to boot 10 times before success.
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Tim - W4TME, Customer Experience Manager

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Official Response
This is a known issue, G7638.  We are working on a new DAX driver that hopefully will resolve this and other issues, such as the periodic buffer corruption that requires a restart of DAX to resolve.  Hopefully, it will be in the next release of SmartSDR as long as we do not run into any issues in testing.  And please note that testing kernel-mode device drivers are more resource-intensive than testing SmartSDR software and firmware code changes.

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Eric - KE5DTO, Official Rep

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One anecdotal report is that waiting to reboot after installation of the DAX drivers happens helps with this issue (1 report from the field that this helped, and 1 test confirmed here at FlexRadio HQ).  This is obviously not a fix, but it may be used as a workaround until a full fix is available.
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Rich McCabe

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Eric, what you you mean waiting on reboot?

I would like to try it on my SurfaceBook again but afraid to?
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Eric - KE5DTO, Official Rep

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During the SmartSDR software installation, towards the end, it prompts you to reboot if it installed any new drivers.  Just leave that screen up for a good 60 seconds before clicking yes to reboot.  Again, this is not a fix, but it seemed to help in at least 2 cases.
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Rich McCabe

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Roger that, going to give it a try. If it doesnt work I am blaming Tim :)
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Rich McCabe

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Well Tim is in luck.

This SurfaceBook pretty much blue-screens every time I install SSDR. Just installed it, waited about 3 minutes and rebooted.  

Have rebooted 10 times and no BSODs

So you might be on to something.
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lz2be

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I installed v.3.1.8 on a new computer and BSOD problems with portcls began. Updating Realtek driver didn't solved it, just BSOD happened after longer period.
Then I copy/paste DAX.settings from my other computer to the new one (directories are the same on both PC) and BSOD was gone!

73 Boyan