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KStars/Ekos crash during Polar Alignment using Canon 700D

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  • Thank you received: 31
Equipment: rPi4b 4GB, Astroberry, KStars updated to 3.5.0, CEM25p, WO Z61, Canon 700D, no guide scope or focuser.

KStars and Ekos always crash to desktop toward the end of the Polar Alignment routine. The 3 images all solve correctly (the new solver works like a champ - thanks to whoever programmed that!). The console reports "Please wait while WCS data is processed", followed shortly by a full shutdown of KStars.

I have attempted the Polar Align about 10 times since moving to the rPi. It did once get as far as showing the results and correction vector, but crashed (not to desktop, frozen) while I was fiddling around trying to get the information large enough to read on my laptop's high-dpi display). For now, I'll settle for solving the post-WCS crash issue.

Here is the tail end of the log, a full log is attached. Pl

File Attachment:

File Name: log_21-42-36.txt
File Size:191 KB
ease let me know if I need to turn on additional logging options.

[2020-12-14T21:46:36.782 EST INFO ][ org.kde.kstars.ekos.align] - "Mount second rotation is complete."
[2020-12-14T21:46:37.104 EST INFO ][ org.kde.kstars.indi] - iOptron CEM25 : "[INFO] West motion stopped. "
[2020-12-14T21:46:37.149 EST DEBG ][ org.kde.kstars.ekos.align] - Mount motion finished.
[2020-12-14T21:46:37.841 EST INFO ][ org.kde.kstars.indi] - iOptron CEM25 : "[INFO] Slew complete, tracking... "
[2020-12-14T21:46:38.301 EST DEBG ][ org.kde.kstars.indi] - Requested exposure 10 closes match is 10.3
[2020-12-14T21:46:38.303 EST DEBG ][ org.kde.kstars.ekos.capture] - setAlignStatus: 4
[2020-12-14T21:46:38.317 EST INFO ][ org.kde.kstars.ekos.align] - "Capturing image..."
[2020-12-14T21:46:38.327 EST INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[INFO] Starting 10.3 seconds exposure. "
[2020-12-14T21:46:38.327 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Starting exposure (exptime: 10.3 secs, mirror lock: 0, force bulb: true, exposure index: 0) "
[2020-12-14T21:46:38.327 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Mutex locked "
[2020-12-14T21:46:38.328 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting radio/menu widget iso: 0 (Auto) "
[2020-12-14T21:46:38.328 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting new configuration OK. "
[2020-12-14T21:46:38.329 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting radio/menu widget imageformat: 0 (Large Fine JPEG) "
[2020-12-14T21:46:38.329 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting new configuration OK. "
[2020-12-14T21:46:38.329 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Using internal bulb widget:eosremoterelease "
[2020-12-14T21:46:38.329 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting radio/menu widget eosremoterelease: 2 (Press Full) "
[2020-12-14T21:46:38.471 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting new configuration OK. "
[2020-12-14T21:46:38.472 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Time left: 10299 ms "
[2020-12-14T21:46:38.473 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Exposure started. "
[2020-12-14T21:46:38.809 EST DEBG ][ org.kde.kstars.ekos.mount] - Mount status changed from "Slewing" to "Tracking"
[2020-12-14T21:46:38.810 EST DEBG ][ org.kde.kstars.ekos.mount] - Slew finished, MFStatus "FLIP_NONE"
[2020-12-14T21:46:43.471 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Time left: 5299 ms "
[2020-12-14T21:46:48.471 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Time left: 299 ms "
[2020-12-14T21:46:48.742 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Reading exposure... "
[2020-12-14T21:46:48.771 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Time left: -1 ms "
[2020-12-14T21:46:48.771 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Closing internal shutter. "
[2020-12-14T21:46:48.771 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Using widget:eosremoterelease "
[2020-12-14T21:46:48.772 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting radio/menu widget eosremoterelease: 4 (Release Full) "
[2020-12-14T21:46:48.783 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Setting new configuration OK. "
[2020-12-14T21:46:48.784 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Exposure complete. "
[2020-12-14T21:46:50.174 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] File added event completed. "
[2020-12-14T21:46:50.175 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Downloading image... Name: (capt0003.jpg) Folder: (/) Delete from SD card? (false) "
[2020-12-14T21:46:50.190 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Downloaded 0x0 (preview 0x0) "
[2020-12-14T21:46:50.207 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Cannot decode (Unsupported file format or not RAW file) "
[2020-12-14T21:46:50.208 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Capture target is INTERNAL RAM. "
[2020-12-14T21:46:50.214 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Capture event completed. "
[2020-12-14T21:46:50.214 EST INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[INFO] Exposure done, downloading image... "
[2020-12-14T21:46:50.786 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] read_jpeg: memsize (53747712) naxis (3) w (5184) h (3456) bpp (8) "
[2020-12-14T21:46:50.960 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Uploading file. Ext: fits, Size: 53755200, sendImage? Yes, saveImage? No "
[2020-12-14T21:46:51.939 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] BLOB transfer took 0.710765 seconds "
[2020-12-14T21:46:51.940 EST DEBG ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[DEBUG] Upload complete "
[2020-12-14T21:46:52.489 EST DEBG ][ org.kde.kstars.indi] - processBLOB() mode 4
[2020-12-14T21:46:53.171 EST INFO ][ org.kde.kstars.ekos.align] - "Image received."
[2020-12-14T21:46:53.175 EST INFO ][ org.kde.kstars.ekos.align] - "Automatically downsampling the image by 3"
[2020-12-14T21:46:53.276 EST INFO ][ org.kde.kstars.ekos.align] - "Evaluating Installed RAM for inParallel Option. Total Size of Index files: 0.935037 GB, Installed RAM: 3.68839 GB, Free RAM: 2.44551 GB"
[2020-12-14T21:46:53.279 EST INFO ][ org.kde.kstars.ekos.align] - "There should be enough RAM to load the indexes in parallel."
[2020-12-14T21:46:53.281 EST DEBG ][ org.kde.kstars.ekos.capture] - setAlignStatus: 4
[2020-12-14T21:46:53.286 EST INFO ][ org.kde.kstars.ekos.align] - "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
[2020-12-14T21:46:53.288 EST INFO ][ org.kde.kstars.ekos.align] - "Starting Internal StellarSolver Sextractor with the 4-SmallScaleSolving profile . . ."
[2020-12-14T21:46:53.649 EST INFO ][ org.kde.kstars.ekos.align] - "Stars Found before Filtering: 242"
[2020-12-14T21:46:53.654 EST INFO ][ org.kde.kstars.ekos.align] - "Removing the stars with a/b ratios greater than 1.5"
[2020-12-14T21:46:53.656 EST INFO ][ org.kde.kstars.ekos.align] - "Keeping just the 50 brightest stars"
[2020-12-14T21:46:53.658 EST INFO ][ org.kde.kstars.ekos.align] - "Stars Found after Filtering: 50"
[2020-12-14T21:46:53.660 EST INFO ][ org.kde.kstars.ekos.align] - "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
[2020-12-14T21:46:53.662 EST INFO ][ org.kde.kstars.ekos.align] - "Configuring StellarSolver"
[2020-12-14T21:46:53.834 EST INFO ][ org.kde.kstars.ekos.align] - "Scale range: 110.557 to 248.754 arcmin wide"
[2020-12-14T21:46:53.836 EST INFO ][ org.kde.kstars.ekos.align] - "Image width: 5184 pixels, Downsampled Image width: 1728 pixels; arcsec per pixel range: 3.8388 to 8.63729"
[2020-12-14T21:46:53.839 EST INFO ][ org.kde.kstars.ekos.align] - "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
[2020-12-14T21:46:53.841 EST INFO ][ org.kde.kstars.ekos.align] - "Starting Internal StellarSolver Astrometry.net based Engine with the 4-SmallScaleSolving profile. . ."
[2020-12-14T21:46:54.042 EST INFO ][ org.kde.kstars.ekos.align] - "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
[2020-12-14T21:46:54.061 EST INFO ][ org.kde.kstars.ekos.align] - "Solve Log Odds: 222.029"
[2020-12-14T21:46:54.063 EST INFO ][ org.kde.kstars.ekos.align] - "Number of Matches: 33"
[2020-12-14T21:46:54.065 EST INFO ][ org.kde.kstars.ekos.align] - "Solved with index: 4111"
[2020-12-14T21:46:54.067 EST INFO ][ org.kde.kstars.ekos.align] - "Field center: (RA,Dec) = (154.394, 89.8579) deg."
[2020-12-14T21:46:54.069 EST INFO ][ org.kde.kstars.ekos.align] - "Field center: (RA H:M:S, Dec D:M:S) = (10:17:34.644, +89:51:28.604)."
[2020-12-14T21:46:54.071 EST INFO ][ org.kde.kstars.ekos.align] - "Field is: (-272504, 511.396) deg from search coords."
[2020-12-14T21:46:54.073 EST INFO ][ org.kde.kstars.ekos.align] - "Field size: 3.45464 x 2.30562 degrees"
[2020-12-14T21:46:54.075 EST INFO ][ org.kde.kstars.ekos.align] - "Pixel Scale: 2.40089\""
[2020-12-14T21:46:54.076 EST INFO ][ org.kde.kstars.ekos.align] - "Field rotation angle: up is 165.076 degrees E of N"
[2020-12-14T21:46:54.078 EST INFO ][ org.kde.kstars.ekos.align] - "Field parity: neg\n"
[2020-12-14T21:46:54.081 EST INFO ][ org.kde.kstars.ekos.align] - "Solver completed after 0.80 seconds."
[2020-12-14T21:46:54.083 EST INFO ][ org.kde.kstars.ekos.align] - "Solver RA (154.39435) DEC (89.85795) Orientation (165.07589) Pixel Scale (2.40089)"
[2020-12-14T21:46:54.085 EST INFO ][ org.kde.kstars.ekos.align] - "Effective telescope focal length is updated to 360 mm."
[2020-12-14T21:46:54.135 EST INFO ][ org.kde.kstars.ekos.align] - "Solution coordinates: RA (11h 05m 05s) DEC ( 89° 44' 38\") Telescope Coordinates: RA (05h 14m 48s) DEC ( 90° 00' 00\")"
[2020-12-14T21:46:54.143 EST DEBG ][ org.kde.kstars.ekos.capture] - setAlignStatus: 1
[2020-12-14T21:46:54.154 EST INFO ][ org.kde.kstars.ekos.align] - "Please wait while WCS data is processed..."
[2020-12-14T21:46:54.180 EST DEBG ][ default] - WARNING: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to Phonon::AudioOutput ( no objectName ).
[2020-12-14T21:46:54.198 EST INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 700D : "[INFO] CCD FOV rotation updated to 165.076 degrees. "
Last edit: 3 years 3 months ago by Ron DeBry.
3 years 3 months ago #64555
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There may be 2 things happening here...

[1] Lost / bad connection to the camera. The line before the lasi show this warning
[2020-12-14T21:46:54.180 EST DEBG ][ default] - WARNING: Phonon::createPath: Cannot connect Phonon::MediaObject ( no objectName ) to Phonon::AudioOutput ( no objectName ).

[2] I recently have issues with the canon driver with my T3i 600D. I shall do more testing as advised by some members when I get a chance

so, besides this polar alignment, did you try capturing images and test continuous video through EKOS?

FYI I have been using the kstar polar alignment (with ASO183mm pro) and it is working fine.
3 years 3 months ago #64603

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Hi Mohamed,

I did, after restarting KStars & Ekos, go ahead and capture images after the crashes (the crash was not a surprise, I had just been waiting for a clear night so it could crash with logging enabled). I did not unplug the camera in between. I'm not expecting a final resolution just from the logs, given the dramatic CTD - that would require a last-breath "here's what just happened that was very bad!" message to be somehow written before everything stops. Why it was trying to send audio, I don't know.

I do not think I have tried continuous videos yet. Is that an integral part of what was supposed to happen next in the polar align routine? I can try that much without being able to see any stars.
3 years 3 months ago #64605

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So yes, I can do live video through the Canon 700D in Ekos. Indoors, so far, but there seems to be no special problem. It certainly does not immediately crash. I can also do looping from the Camera tab.
Next time I can see stars I will try the polar alignment function in CCDCiel and see how that goes.

Looking at other people's screenshots from the polar assistant, it looks like "Please wait while WCS data is processed..." should be followed by "WCS data processing is complete" and then "Mount axis is..." messages, neither of which were written to the log file before the crash, so the issue might be in processing the WCS data rather than in the camera connection. Just a guess, though.
3 years 3 months ago #64646

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Adding this post because it bothers me when I search forums for an issue I have, only to find threads that just end with no indication if the problem was solved or the person just gave up.

In this case, I moved on without solving the problem (I added a guidescope + ASI120mm mini camera). The ASI120mm works fine with the Polar Align, so the problem using the dslr is presumably related to the dslr.
3 years 3 months ago #65035

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So one possibility, but I can't guarantee this is the solution, is that I have seen an issue before where an audio notification was requested and it tried to use Phonon to make the sound, but then when an audio device wasn't available that crashed KStars. This has usually not been the case, but you did mention that there was a Phonon Warning just before the crash, so I thought I would mention it. You could try turning off one or more audio notifications in the Configure Notifications Dialog.
3 years 3 months ago #65061

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