I didn’t build it myself. 
I just used: sudo apt-get install gphoto2
When I check the version using: gphoto2 -v
I get what I pasted in the thread.
If I try to install libusb-dev package separately, it says “Unable to locate 
libusb-dev package”.


> On 20-Apr-2019, at 03:23, Hubert Figuiere <h...@figuiere.net> wrote:
> 
>> On 2019-04-19 11:41 a.m., S A wrote:
>> Camera: Canon G7X Mark II
>> Ubuntu 18.04
>> ----------------------------------------------------------------------------------------------------
>> env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --capture-image
>> *** Error ***
>> Could not detect any camera
>> *** Error (-105: 'Unknown model') ***
>> ----------------------------------------------------------------------------------------------------
>> This version of gphoto2 is using the following software versions and
>> options:
>> gphoto2 2.5.15 gcc, popt(m), exif, cdk, aa, jpeg, readline
>> libgphoto2 2.5.22 all camlibs, gcc, ltdl, EXIF
>> libgphoto2_port 0.12.0 iolibs: disk ptpip serial, gcc, ltdl, no USB, serial
>                                                               ^^^^^^^^
> 
> That's the problem. It doesn't even have USB support.
> 
> If you build it yourself, you probably forgot to install libusb development 
> packages.
> 
> Hub


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