Bug#972703: gnome-boxes does not start, undefined symbol libusb_set_option

[Carnë Draug]

On Thu, 22 Oct 2020 at 21:47, Simon McVittie <smcv at debian.org> wrote:
>
> On Thu, 22 Oct 2020 at 19:14:54 +0100, David Miguel Susano Pinto wrote:
>> gnome-boxes does not start.  Trying from command line, issues this error:
>>
>>     $ gnome-boxes
>>     gnome-boxes: symbol lookup error: /usr/lib/x86_64-linux-gnu/libusbredirhost.so.1: undefined symbol: libusb_set_option
>>
>> Similar issue when starting qemu:
>>
>>     $ qemu-system-x86_64
>>     qemu-system-x86_64: symbol lookup error: qemu-system-x86_64: undefined symbol: libusb_set_option
>
> It starts fine on a Debian 10 system for me. According to
> /var/lib/dpkg/info/libusb-1.0-0:amd64.symbols, that symbol has been provided
> by libusb-1.0-0 since version 2:1.0.22, which you have.
>
> Do you have an older version of libusb-1.0.so.0 somewhere in the library
> search path, perhaps in /usr/local/lib?

I checked and other than "/lib/x86_64-linux-gnu/libusb-1.0.so.0"
(provided by libusb-1.0-0) I also have "/lib/libusb-1.0.so.0" (which
seems to be what is loaded:

    $ ldd /usr/bin/gnome-boxes | grep usb
        libusb-1.0.so.0 => /lib/libusb-1.0.so.0 (0x00007f49d1393000)
        libusbredirhost.so.1 =>
/usr/lib/x86_64-linux-gnu/libusbredirhost.so.1 (0x00007f49c88fb000)
        libusbredirparser.so.1 =>
/usr/lib/x86_64-linux-gnu/libusbredirparser.so.1 (0x00007f49c88f00

Removing "/lib/libusb-1.0.so*" (and run ldconfig to update the linker
cache), makes it load the right libusb:

    $ ldd /usr/bin/gnome-boxes | grep usb
        libusb-1.0.so.0 => /lib/x86_64-linux-gnu/libusb-1.0.so.0
(0x00007fc22ff71000)
        libusbredirhost.so.1 =>
/usr/lib/x86_64-linux-gnu/libusbredirhost.so.1 (0x00007fc2274b3000)
        libusbredirparser.so.1 =>
/usr/lib/x86_64-linux-gnu/libusbredirparser.so.1 (0x00007fc2274a8000)

And gnome-boxes now works properly.

The thing is, I have no idea where this /lib/libusb came from.  I'm
pretty sure I didn't install anything other than debs from the
official debian repos.  dpkg-query also does not know which package
installed it:

    $ dpkg-query -S /lib/libusb-1.0.so.0.1.0
    dpkg-query: no path found matching pattern /lib/libusb-1.0.so.0.1.0

I have one other Debian machine which has the same file.  Any clues
where that file came from and what it may be used for?

Thank you
David