Update Manager doesn't start up anymore

[Michael]

when using the console (sudo update-manager -d)
the following error occures:

(process:2731): Gtk-WARNING **: Locale not supported by C library.
 Using the fallback 'C' locale.
Traceback (most recent call last):
  File "/usr/bin/update-manager", line 61, in <module>
    help=_("Show version and exit").decode(enc))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe3 in position 0: ordinal not in range(128)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-firmware 1.79.18
ProcVersionSignature: Ubuntu 3.2.0-92.131-generic-pae 3.2.71
Uname: Linux 3.2.0-92-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: i386
Date: Wed Oct 28 10:21:07 2015
Dependencies:

InstallationMedia: Ubuntu 12.04 "Precise" - Build i386 LIVE Binary 20130216-01:12
MarkForUpload: True
PackageArchitecture: all
SourcePackage: linux-firmware
UpgradeStatus: Upgraded to precise on 2015-10-27 (0 days ago)

[Juerg Haefliger (juergh)]

I'm closing this bug due to old age. Please open a new bug if you think the issue still exists.