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Windows 7: Fresh Build - Constant BSOD - Multiple Codes - 3b, 50, a

07 Jun 2012   #81
Vir Gnarus

Microsoft Community Contributor Award Recipient

Windows 7 64-bit
 
 

Well, it's evident there looks to be some major malfunctioning of the TCP stream. The wireshark logs show a lot more explicit evidence of this. It looks like huge bursts of TCP retransmitting of packets. The first log with the download of Windows update file showed a TCP stream lasting 7 seconds, then a sudden gap of 31 seconds during the TCP stream and then an immediate retransmission of the packets afterwards. Then it goes for another 17 seconds with a few mass retransmissions then there's a 65 second gap and another mass retransmission.

Wireshark is having problems analyzing the TCP stream properly because every single TCP ACK packet appears to have a zeroed checksum. Often this is because of a feature on NICs called Checksum Offloading. You can turn it off by typing "view network connections" in Start Menu then right-clicking and going to Properties for your associated network adapter, then click the "Configure" button and then mosey on over to the Advanced tab. There should be an option called TCP Checksum Offload, which you can then set to disable.

Anyways, I reaaaally doubt we're dealing with some misbehaving program here. You should start by uninstalling and reinstalling your network drivers with the latest available version from your mobo's manufacturer (make sure to download your network drivers first before uninstalling them!). If that does not work, you may need to cough up some dough for a cheap NIC then connect through that and test connectivity. We could very well be dealing with a failing network controller here.

If you wish to make another run of Wireshark with Checksum Offloading disabled, I highly recommend you run both wireshark and xperf simultaneously. Only capture the download before it starts and then stop after it hangs for a bit. Stop the logging before you stop the download.

That should most likely be our final run of logs for this.


My System SpecsSystem Spec
.
07 Jun 2012   #82
LP81

Windows 7 Ultimate x64
 
 

I re-downloded the latest Drivers directly from Gigabyte's site.
Fully uninstalled the LAN drivers.
Restarted the computer.
Verified there were no network drivers.
Fresh install of LAN Drivers.

Tested file download - stalled out.

Went into the network properties, and I have both TCP Checksum Offload (IPv4) and (IPv6). Options were Disabled, Rx & Tx Enabled, Rx Enabled, Tx Enabled. I chose "disabled" both of them.

Full shutdown and restart to verify setting kept.

Started xperf and Wireshark.

Waited approximately 10 seconds to start the download to ensure both monitoring services were running.

As soon as it stalled out, I stopped both xperf and Wireshark (without killing the download)

Logs can be found here: Zippyshare.com

Note: I did try Safemode + networking and both times, files seemed to come down without incident, but I want to run it a few more times to verify this finding.
My System SpecsSystem Spec
07 Jun 2012   #83
Vir Gnarus

Microsoft Community Contributor Award Recipient

Windows 7 64-bit
 
 

You gave me an xperf log and a Procmon log, not Wireshark? Lol.

EDIT: nm, I forgot both use the same extension for their logs.
My System SpecsSystem Spec
.

07 Jun 2012   #84
LP81

Windows 7 Ultimate x64
 
 

Oops, it's the right file, but I put the wrong file extension on it when I saved it out.

Just change .PML to .pcap

Sorry about the confusion

Edit: I see you figured it out, I replied based on the email notification
My System SpecsSystem Spec
07 Jun 2012   #85
Vir Gnarus

Microsoft Community Contributor Award Recipient

Windows 7 64-bit
 
 

All right, you can re-enable checksum offloading, otherwise it'll use up your CPU more when doing network activity as opposed to offloading checksum calculations onto the network controller.

I'll go through all this, thanks. I noticed immediately that at the 12-14 second mark on xperf there's a huge burst of net activity, which has a hiccup in the middle of it, and then afterwards drops to nothing for the duration of the log. The xperf log coincides with this as you can see in the attached graphs. You said that you stopped logging as soon as you saw that the download was halted, but it looks here like it continues on for about another 15 seconds or so before the logging stops on either one. Anyways, I'll try to see what I can scrounge up if I can find anything.

Another thing: I noticed in the xperf logs you've given me that for some reason the stacks have not been saved, (the 'stackwalk' feature), which kinda leaves me out in the dark a good bit on what's going on. You made sure to do the registry tweak by adding DisablePagingExecutive, correct? Can you verify it has been entered correctly? Any misnomer (note that registry keys can be case sensitive, I think) can prevent it from working properly.
My System SpecsSystem Spec
07 Jun 2012   #86
LP81

Windows 7 Ultimate x64
 
 

When I ran this, it didn't seem to do anything:
REG ADD "HKLM\System\CurrentControlSet\Control\Session Manager\Memory Management" -v DisablePagingExecutive -d 0x1 -t REG_DWORD -f

Because when I tried to run "xperf -on latency -stackwalk profile" it gave me a warning that the stackwalk wasn't enabled

So I manually changed the value to 1 in regedit

See attached image.

It no longer gave me the warning when running xperf

Please let me know if I missed something or skipped a step
My System SpecsSystem Spec
07 Jun 2012   #87
Vir Gnarus

Microsoft Community Contributor Award Recipient

Windows 7 64-bit
 
 

Yes, that's splendid. You'll need to restart and do - sigh - another round of logging the same as before. Make sure to have a stopwatch or something in hand to record when you start the download and when you see it dropping to nothing. Of course, make sure there's no error message about the stackwalk thing.
My System SpecsSystem Spec
07 Jun 2012   #88
LP81

Windows 7 Ultimate x64
 
 

To clarify, that registry setting was like the when I ran this last batch of tests...

The screenshot was merely showing it was already done.

I can restart again and run the test if you like. I have my running watch which will do split times.
My System SpecsSystem Spec
07 Jun 2012   #89
Vir Gnarus

Microsoft Community Contributor Award Recipient

Windows 7 64-bit
 
 

So you did not receive the stackwalk error last time you ran the tests? That sounds odd given that it's not saving the stacks as it's intended to do.
My System SpecsSystem Spec
07 Jun 2012   #90
LP81

Windows 7 Ultimate x64
 
 

Correct - see attached screenshot of the CMD

No errors
My System SpecsSystem Spec
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 Fresh Build - Constant BSOD - Multiple Codes - 3b, 50, a




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