Appears QHY reintroduced a bug that was fixed in an earlier SDK, so I contacted them for a fix. Stay tuned.

There is a new QHYSDK release now that should fix this issue. It's in GIT now and should land in nightly later.

Will this fix the issues with the camera becoming unresponsive when capture is aborted, or is this going to fix the issues with it crashing while connecting to the driver in the first place?
Both are issues, the former was pre-existing, the latter only appeared recently.

I guess it is a matter of trying out. For me I hope that the QHY9 filter wheel starts working again under Linux. Fingers crossed

Unfortunately the QHY9 filter wheel still doesn't work properly. The very first time I connected the camera and filter wheel it did work. Changing to a different filter actually made the filter wheel turn. But after three or four changes the filter wheel stopped responding again. I restarted KStars and reconnected Ekos but to no avail. The filter wheel is completely unresponsive again.

Jasem, perhaps I could talk to QHY directly and ask them for support for my old QHY9 camera. Could you help me contact them or do you prefer to do that yourself?

I relayed your concern to QHY, hopefully they can investigate the issue.

I jumped on the QHY forum to point out the challenges we've been having with their driver and asked them what their commitment is to Linux, in particular INDI. Perhaps those of us with QHY devices can add their thoughts on that thread. We're probably a small part of their overall market, but every little bit helps. (I did it as nicely as I could in case you are wondering ...

jmh

nice one thanks, found your thread en.coolccd.com/bbs/index.php?topic=6693.msg34578

Regarding the Orion SSAG with the QHY drivers. I installed the nightly bleeding version to test the new build with the patched SDK but am still experiencing same/similar issues.
The new Orion SSAG driver crashes with Orion SSAG. Is it only meant for the imaging cameras such as the G3 Deep Space mono cam?
The QHY driver still has issues from aborting images. I receive this error when I test image capture and aborts. Sometimes it just crashes too.

If you can post the detailed log, we can forward it to QHY. This is an issue with QHYSDK, not INDI. So it has to be fixed from QHY.

I will try to provide those when I get the chance.
Incidentally I can probably get in touch with a local who was part of the QHY driver development team for windows through an acquaintance. Maybe they can help.

Sorry for the delay. I have logged some tests of the Orion SSAG failing after aborted exposure. Here are relevant excerpts with description, and full log.