I too have been having a similar problem with my Canon 100D, and though it may be coincidence, it has started since the latest slew of updates. My set is that on my "portable" mount, I have a TinkerBoard S that runs Linux and uses INDI drivers, with an EQ6-Pro mount, a SW 150PDS with an astr0modded Canon 100D and a QHY5LIIM guide camera on an Orion Guide Scope. All was well until recently where the sequence of events would be as follows.

I could set up the rig and slew the scope to a bright star to focus the scope. I'd be able to do that fine using a Bahtinow mask, so then I'd slew to the target I'm after with the software doing plate solving etc., to get me there. All OK up to now. Then I would start the auto guider and it would all stop working in that the auto guider would appear to be OK, but the Canon would display the symptoms described by Rishi. I was using the Canon INDI driver, so I triep the gphoto driver as per your suggestion, but that was exactly the same.

Being a scientist with an inquisitive mind, I decided to hook everything up to a laptop to see if it was related to the TinkerBoard, but that's where things became more odd (or maybe more clear, I'm not sure). First I tried running under Ubuntu with KStars / EKOS, and the 100D worked fine on it's own, but when I went to the guider page, any attempt to get the gude camera to start looping resulted in time-out errors on the QHY5LII, so I different issue apparently, but one that still leave the system unuseable. However, my laptop is dual boot so I went to trusty old Windows and fired up SGPro and PHD2 using ASCOM drivers and all worked absolutely fine - the reason for this latter course of action was to confirm that I don't have any faulty hardware, which it successfully proved.

So my question is whether it is the Canon driver that is the problem, or is it the QHY driver (I notice that this was updated to a newer SDK if I recall correctly) that is the cause of the trouble. I am lucky in that I can run the whole thing under Windows, but I do want to get back to using my TinkerBoard as that is what makes the mount "portable", not the weight!

Terry

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