With last git indi_dsi_ccd go in segfault:
...
[  191.373918] indi_dsi_ccd[2382]: segfault at 0 ip 00005629e923245c sp 00007fffd18f2200 error 4 in indi_dsi_ccd[5629e9230000+19000]
[  191.373925] Code: c0 48 89 45 b0 48 8d 7d b0 48 8d 15 ed 6c 01 00 48 8d 72 fd e8 25 09 00 00 48 8b 03 4c 8b b0 b0 01 00 00 48 8b bb 28 80 00 00 <48> 8b 07 ff 90 90 00 00 00 89 c2 48 8d 85 40 ff ff ff 48 8d 75 90
[  191.702951] indi_dsi_ccd[2384]: segfault at 0 ip 0000558a5f3b045c sp 00007ffdc8374bd0 error 4 in indi_dsi_ccd[558a5f3ae000+19000]
[  191.702962] Code: c0 48 89 45 b0 48 8d 7d b0 48 8d 15 ed 6c 01 00 48 8d 72 fd e8 25 09 00 00 48 8b 03 4c 8b b0 b0 01 00 00 48 8b bb 28 80 00 00 <48> 8b 07 ff 90 90 00 00 00 89 c2 48 8d 85 40 ff ff ff 48 8d 75 90
[  192.044495] indi_dsi_ccd[2386]: segfault at 0 ip 000055ee3f7ca45c sp 00007ffd5fb3b530 error 4 in indi_dsi_ccd[55ee3f7c8000+19000]
[  192.044506] Code: c0 48 89 45 b0 48 8d 7d b0 48 8d 15 ed 6c 01 00 48 8d 72 fd e8 25 09 00 00 48 8b 03 4c 8b b0 b0 01 00 00 48 8b bb 28 80 00 00 <48> 8b 07 ff 90 90 00 00 00 89 c2 48 8d 85 40 ff ff ff 48 8d 75 90
[  192.378028] indi_dsi_ccd[2389]: segfault at 0 ip 0000556e5297e45c sp 00007ffe4a247af0 error 4 in indi_dsi_ccd[556e5297c000+19000]
[  192.378037] Code: c0 48 89 45 b0 48 8d 7d b0 48 8d 15 ed 6c 01 00 48 8d 72 fd e8 25 09 00 00 48 8b 03 4c 8b b0 b0 01 00 00 48 8b bb 28 80 00 00 <48> 8b 07 ff 90 90 00 00 00 89 c2 48 8d 85 40 ff ff ff 48 8d 75 90
...

Kstars log only report:
...
[2022-03-11T10:52:22.055 CET INFO ][           org.kde.kstars.ekos] - "Unable to remotely establish:\n+ Meade Deep Sky Imager\nPlease ensure the device is connected and powered on."
...

Bye.
 

Looking through the GIT, some 18/20 days ago there were massive changes made for 'Capture Format' across many CCD 3rd party drivers, all tagged with 'need testing'

Not saying this is the root cause of what you see but seems only ASI got the full treatment for support(???)

ASI: Implement CCD_CAPTURE_FORMAT
Many others: Add capture format support. Needs testing

Yes this is.
Last usable is: commit e2c02d8b98adeb217e031e7938b62e28f8bf61d5

After, in indi-dsi/dsi_ccd.cpp: "Add capture format support. Needs testing" ..as been added:

+ CaptureFormat mono = {"INDI_MONO", "Mono", 16, true};
+ CaptureFormat color = {"INDI_RGB", "RGB", 8, true};
+ addCaptureFormat(dsi->isColor() ? color : mono);

..this crash my DSI !!!!

I don't have DSI to test, can you check why? is dsi object not defined/accessible by this line?

I found the issue and pushed a fix. Should be in nightly later today.

Yes now work ok, thanks!!