Wrong auto support generation

I have problems with support generation.
I need to use support because of gopro overhang. But there is two holes which I guess should be taken as a bridge, but it is not and is supported. - guess it is bug of bridge detection
Second bug is that if it is supported, it should be supported from part of the object under, not whole height from the bed through object??
Please see attachments.

Using: slic3r 1.2.9. 32bit
Config + files in attachment

Thanks for help with fixing.
Jan

Yes, it looks wrong. Try slicing with Cura...

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

on my setup i dont got this error

slic3r 1.2.9

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CTC 3D Drucker, fabrikator II mini, ultimaker-diy,
Modifizierter Prusa I3 Boxed.
Baubericht im Blog: [blog.gafu.de]

Thank you Gafu. I checked your config file compared to mine and it is different.
Also I can see lot of green color in your image compared to mine. You are supporting walls which does not need support.
There is still visible problem with autodetecting bridges in your image. I still guess that the problem part is bridge detection and does not need support at all.
Second problem with support under the object with your configuration seems OK. Tried your configuration and it works as on your image.
Tried also to change only angle treshold from 0=automatic to your 75 and it gives me totaly different result so it will depend on some other settings (maybe layer height or so... did not tried)
Tried also to change to 45 and support under object is still there...

mostly i do construct minimal support structures in the CAD, so i dont need the slicer support.

this takes some time at construction, but saves some afterwork too.


a lot of things can be supported by a view small bridges

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CTC 3D Drucker, fabrikator II mini, ultimaker-diy,
Modifizierter Prusa I3 Boxed.
Baubericht im Blog: [blog.gafu.de]