Re: libgphoto2 freezes occasionally

On Wed, Jun 28, 2017 at 01:08:29PM +0200, Tom Sanders wrote:
> Hi,
> 
> I am using gphoto2 with Python-gphoto2 on Raspberry Pi to control a Sony A5000 camera. If I shoot
> a series of photos, somewhere between 5 and 50 shots, gphoto2 freezes. With another camera A6000)
> or an other Raspberry this happens too. Interval between shots is 5 seconds.
> 
> Python uses 15% cpu time (peak), the corresponding kernel thread 14% cpu (according to TOP)
> 
> If I enable logging, the problem disappears and I can take hundreds of shots without any problem!
> The only warning in the log is:
> 
> "camera_sony_capture [library.c:3911] no object found during event polling. try the 0xffffc001
> object id"
> 
> This does not seem to have any influence.
> 
> With logging, Python cpu time has increased to 50% (peak), kernel thread still uses 14%.
> 
> Does anyone know what could be happening here? Leaving the logging on is not really a problem, but
> does not feel as a stable solution.

We might be missing the event for object added, and the slight change of timing might make it work/change
behaviour.

Which libgphoto2 version is in use, as this has been improvede in current versions?

Ciao, Marcus

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