gphoto2 --set-config expprogram=5 does not work for Sony Alpha-A5100

[dominoc]

Describe the bug gphoto2 is unable to set a Sony camera's exposure program mode.

A clear and concise description of what the bug is. gphoto2 does not set the Exposure Program mode of a Sony Alpha-A5100 camera even though the command runs successfully without any error messages.

Name the camera Sony Alpha-A5100 (Control) usb:001,013

If this is camera specific, include the camera name as shown by gphoto2 --auto-detect or USB IDs

libgphoto2 and gphoto2 version output of: gphoto2 --version gphoto2 2.5.23

Copyright (c) 2000-2019 Marcus Meissner and others

gphoto2 comes with NO WARRANTY, to the extent permitted by law. You may redistribute copies of gphoto2 under the terms of the GNU General Public License. For more information about these matters, see the files named COPYING.

This version of gphoto2 is using the following software versions and options: gphoto2 2.5.23 gcc, popt(m), exif, cdk, aa, jpeg, readline libgphoto2 2.5.25 standard camlibs (SKIPPING lumix), gcc, ltdl, EXIF libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking

To Reproduce Steps to reproduce the behavior:

1. The current Exposure Program of the camera is P (Programmed mode).
2. In the command line, enter the following to set Manual mode: $ gphoto2 --set-config expprogram=5
3. The command is executed without any error messages but the camera's Exposure Program mode remains P.

If its a camera misbehavior, attach debug output using --debug --debug-logfile=debug.log (if considered useful). logfile.txt