Bug#783637: Installation fails because starting colord fails on missing libudev.so.0
05.05.2015 14:55, Michael Lager wrote:
> This was an upgrade from debian wheezy to jessie and a report (as requested) on how it went. I just hope this can be put right for others wishing to upgrade and finding it doesn't work. My work-around was to create a symbolic link (result as below) for the missing file based on the pattern for symbolic links elsewhere: jessie now works OK.
>
> $ ll|grep udev
> lrwxrwxrwx 1 root root 21 Apr 16 16:53 libgudev-1.0.so.0 -> libgudev-1.0.so.0.2.0
> -rw-r--r-- 1 root root 42920 Apr 16 16:53 libgudev-1.0.so.0.2.0
> lrwxrwxrwx 1 root root 38 Apr 16 16:53 libudev.so -> /lib/x86_64-linux-gnu/libudev.so.1.5.0
> lrwxrwxrwx 1 root root 10 Apr 28 11:10 libudev.so.0 -> libudev.so
> lrwxrwxrwx 1 root root 12 Apr 29 10:34 libudev.so.1 -> libudev.so.0
So for someone who finds this, don't do this, this is WRONG. The libs are
named the way they are for a purpose, because symbols in libudev.so.0 are
not compatible with these in libudev.so.1 and so on. Sometimes such symlinking
makes some executable to start so seemingly this smells like a solution, but
it is quite possible that this executable will just crash when asked to do
something real. Sometimes this doesn't work at all.
This has nothing to do with upgrade from wheezy to jessie really. You have
locally installed alternative libusb-1.0.so.0. This library is not recorded
in the dpkg database so apt/dpkg doesn't know about it and doesn't know
that it needs libudev.so.0. This is a library you installed manually.
The solution is to either install libudev0 package to make your libusb-1.0 to
work (and maybe record that libudev0 is needed so it wont be removed by a
chance), or, better yet, just remove your libusb-1.0, because jessie comes
with its own, most likely never version, and together with support.
Your situation is rare, because it is uncommon to install 3rd party libraries
like this, and even less common to come across such an issue.
But the "solution" you offered is _wrong_.
Thanks,
/mjt
> On Mon, 4 May 2015 18:04:02 +0200 Samuel Thibault <sthibault@debian.org> wrote:
>> Michael Lager, le Mon 04 May 2015 12:54:14 +0100, a écrit :
>> > /usr/local/lib/libusb-1.0.so.0
>> > NEEDED libudev.so.0
>> > NEEDED librt.so.1
>> > NEEDED libpthread.so.0
>> > NEEDED libc.so.6
>> > dpkg-query: no path found matching pattern /usr/local/lib/libusb-1.0.so.0
>>
>> We can not support the dependencies of locally-installed software.
>> Either remove that software, or install the required dependencies (here,
>> fetch the libudev0 package from wheezy)
>>
>> Samuel
>>
>>
>
>
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