Previously-working installs now timing out when trying to execute commands

[musubk]

Describe the bug

I have two different installs of gphoto2 on two different Ubuntu desktops that have been functioning autonomously for a couple of years. Since this fall, both have been frequently failing to operate. gphoto2 --version will return the current version number (gphoto2 2.5.28, libgphoto2 2.5.31, libgphoto2_port 0.12.2). gphoto2 --auto-detect will return the connected camera (Sony Alpha-A7S II (Control) usb:001,002). But any command to read or change camera settings or take a picture will time out and fail. Example command: gphoto2 --get-config iso or gphoto2 --capture-image-and-download. Rebooting the computer does not fix the issue. If i have someone at the remote site power the camera off/on and unplug/replug the USB cable it will sometimes start working again, sometimes not. When it does resume working, it will only last for 2-3 days until it fails again. I've tried changing the USB port on the computer, replacing the USB cable, and replacing the camera.

Name the camera Sony Alpha-A7S II (Control) usb:001,002

libgphoto2 and gphoto2 version user@desktop:~$ gphoto2 --version gphoto2 2.5.28

Copyright (c) 2000-2021 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 2.5.28 gcc, popt(m), exif, no cdk, no aa, no jpeg, no readline libgphoto2 2.5.31 standard camlibs (SKIPPING docupen lumix), gcc, no ltdl, EXIF libgphoto2_port 0.12.2 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, no ltdl, EXIF, USB, serial without locking

To Reproduce Steps to reproduce the behavior: gphoto2 --get-config iso

A debug file from both computers/cameras is included below Gak_gphoto2_output.txt Too_gphoto2_output.txt