Computer Crash while taking Dark Frames

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bpm990d
Posts: 2
Joined: Mon Mar 23, 2020 12:28 pm

Computer Crash while taking Dark Frames

Post by bpm990d » Mon Mar 23, 2020 1:45 pm

Hello,

I was imaging the other day and ran into several computer crashes while taking darks. I'm using Windows 10 Remote Desktop from my office into get into the computer that is on the mount. It almost looks like the remote desktop freezes, but I think that is because RD just shows the last image it received and it takes a while for it to time out. It's clearly a reboot, because it takes about 2 or 3 minutes to get back in, and then nothing is running. SharpCap has been working flawlessly for about six months although I generally update it when it tells me there is a new version.

I was taking 20 dark frames that were six minutes each with a gain of 122. It would start out fine and after a few captures I would lose the remote desktop connection and when I managed to get back in the system had re-booted.

I attached a truncated log file. The one I got from the recent crash was too large to upload. I can certainly provide the whole thing if you need it via drop box or a .zip file.


REMOTE SYSTEM:
Minix N42C-4 - Quad Core @ 1.1Ghz base & 16Gig of RAM
Win. 10 Pro. V 1909
OS Build 18363.720
Gig Ethernet connection into the house.
ZWO 294MC Pro cooled

SharpCap Pro V. 3.2.6269.0 - 3/16/2020
ZWO camera Driver - v3.0.0.7
ASCOM 6.4.1.2695

Any help would be appreciated.

Brian
Maine USA
Attachments
SHORTENED Log_2020-03-23T08_15_12-8384.log
(359.88 KiB) Downloaded 2 times

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admin
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Re: Computer Crash while taking Dark Frames

Post by admin » Mon Mar 23, 2020 8:19 pm

Hi,

If your computer is crashing then you would probably be better off looking in the Windows event log to see if there's anything recorded there that might have gone wrong at the system level.

SharpCap as a user application cannot (in theory) crash a Windows computer, although it is possible for the drivers for a camera to do that and of course that sort of camera driver related crash may only happen when the camera is used in particular ways.

The log does cut off abruptly without any sign of SharpCap shutting down or generating an error inside the application, which does tie in with something bringing the whole computer down unexpectedly.

Cheers, Robin

bpm990d
Posts: 2
Joined: Mon Mar 23, 2020 12:28 pm

Re: Computer Crash while taking Dark Frames

Post by bpm990d » Tue Mar 24, 2020 12:05 am

Robin,

Thanks for the quick reply. I did look through the SharpCap event logs and didn't see anything but probably wouldn't know what I was looking at. I had hoped someone had a similar experience. I didn't realize that the program itself couldn't cause a system crash.

I'll have a go at looking at the Windows logs, but I'm not even sure I know what to look for. I did find the windows event viewer, cleared the Windows logs under application and system. I then re-created the crash event while attempting to take darks. There was some windows gobbledygook in the system logs about a thermal event which was kind of odd since it's just above freezing in the garage. I did have the computer apart two weeks ago and inspected everything and noting looked out of the ordinary. The small heatsink and fan was firmly attached.

I'm running the dark frame captures again and all seems to be going fairly well as I'm on 12 of 20 captures. The CPU seems to be running at a nominal speed of 1.10Ghz and only throttling up on occasion. The funny thing is that the camera worked fine for taking lights and I managed to collect 40 exposures last night and they look fine. Early this morning was when I tried to capture the darks and got the numerous crashes.

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Re: Computer Crash while taking Dark Frames

Post by admin » Tue Mar 24, 2020 6:49 pm

Hi,

It could be that the calculations required to average the dark frames once they have all been captured are putting a higher load on the CPU than normal usage. Even live stacking might not have as much effect as if you are taking 30s frames, it only has to do the complicated calculation for stacking once every 30s. When you capture lots of dark frames though it processes them all in one go.

If you can run the computer with the lid off it would be worth checking that the fan is actually working properly and spinning up. It does sound as though there could be a problem with the CPU overheating.

Cheers, Robin

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