Re: [Libmtp-discuss] libmtp error: could not get object handles for some directories

[Andrea V. <and...@un...>]

Hi,
Il giorno sab, 12/05/2018 alle 09.43 -0700, Philip Langdale ha
scritto:
> On Thu, 10 May 2018 12:47:39 +0200
> Andrea Vai <and...@un...> wrote:
> 
> > Hi,
> >   I obtain the above error while browsing an mtp device in gnome-
> > nautilus on Fedora 27.
> > 
> > The problem seems to be triggered by the number of files in the
> > directory.
> > 
> > See https://bugzilla.redhat.com/show_bug.cgi?id=1401826
> > 
> > Is there any way to investigate it?
> > Let me know if I can help in any way.
> > 
> > Running libmtp 1.1.14
> > 
> > Thank you very much,
> > Best regards
> > Andrea Vai
> 
> You can override the device timeout value, and libmtp actually does
> this in a different call that retrieves the list of all files on the
> device. The gvfs code that is relevant in your example is only
> getting
> the file list for a single directory but if the device has a silly
> default timeout (likely - thank's samsung), it might still hit it.
> So
> I'd try setting a larger timeout and see if it helps. If that does
> help, you can then look at implementing it as a device quirk.
> 
> See get_all_metadata_fast for the current usage and then look at
> LIBMTP_Get_Files_And_Folders for where you'd want to adjust the
> timeout
> (around the call to ptp_getobjecthandles).

Thank you for your kind reply, Phil. I downloaded the current source
code and found the strings you mention in libmtp.c. I guess I should
increase the "60000" value at line 2620. Though, I am not skilled in
linux development, so some further hints would be greatly appreciated
(should I change the value, remove my libmtp installed package, build
and install the hacked source code, and try if it works?). In the
meantime, I will try to figure it out.

Thank you,
best regards
Andrea