I would also like to add confirmation of this issue. Running Mint 17.1 Cinnamon 32bit, upgraded from Mint 17 via the update manager... Mint 17 was a fresh install. Selecting 'Base (Rebecca)' in mintsources works as expected, however selecting 'Base (trusty)' results in either window closure or failure to open the next window. Running mintsources in terminal gives these errors when 'Base(trusty)' button clicked.. steve@mint17cinn ~ $ mintsources Error '' on url http://ftp.uninett.no/ubuntuError '' on url http://no.archive.ubuntu.com/ubuntu Error 'RETR response: 550' on url ftp://ftp.rrzn.uni-hannover.de/pub/mirror/linux/ubuntu Error 'Failed to connect to ubuntu.univ-reims.fr port 80: Connection timed out' on url http://ubuntu.univ-reims.fr/ubuntu Error 'Failed to connect to mirrors.coreix.net port 80: Connection timed out' on url http://mirrors.coreix.net/ubuntu Error 'RETR response: 550' on url ftp://ftp.cesca.cat/ubuntu/archieve Error 'Failed to connect to ubuntu.virginmedia.com port 80: Connection timed out' on url http://ubuntu.virginmedia.com/archive Error 'Failed to connect to mirror.as24220.net port 80: Connection timed out' on url http://mirror.as24220.net/pub/ubuntu Error 'Failed to connect to ubuntu.etf.bg.ac.rs port 80: Connection refused' on url http://ubuntu.etf.bg.ac.rs/ubuntu Error 'Failed to connect to archive.ubuntu.nautile.nc port 80: Connection timed out' on url http://archive.ubuntu.nautile.nc/ubuntu Error 'Failed to connect to mirror.bjtu.edu.cn port 80: Connection timed out' on url http://mirror.bjtu.edu.cn/ubuntu Error 'RETR response: 550' on url ftp://ftp.rezopole.net/ubuntu Error 'Couldn't resolve host 'ubuntu.mirror.pop-sc.rnp.br'' on url http://ubuntu.mirror.pop-sc.rnp.br/ubuntuError 'Couldn't resolve host 'archive.ubuntu.csg.uzh.ch'' on url http://archive.ubuntu.csg.uzh.ch/ubuntu Error 'Couldn't resolve host 'ubuntu-archives.mirror.nexicom.net'' on url http://ubuntu-archives.mirror.nexicom.net Error 'Couldn't resolve host 'mirror.dhakacom.com'' on url http://mirror.dhakacom.com/ubuntu-archive Error 'Couldn't resolve host 'mirrors.aliyun.com'' on url http://mirrors.aliyun.com/ubuntuError 'Couldn't resolve host 'ftp.byfly.by'' on url http://ftp.byfly.by/ubuntu Error 'Couldn't resolve host 'ubuntu.mirror.iweb.ca'' on url http://ubuntu.mirror.iweb.ca Error 'Couldn't resolve host 'mirror.switch.ch'' on url http://mirror.switch.ch/ftp/mirror/ubuntuError 'Couldn't resolve host 'mirror.lzu.edu.cn'' on url http://mirror.lzu.edu.cn/ubuntuError 'Couldn't resolve host 'mirror.unesp.br'' on url http://mirror.unesp.br/ubuntu Error 'Couldn't resolve host 'mirror.its.sfu.ca'' on url http://mirror.its.sfu.ca/mirror/ubuntu Error 'Couldn't resolve host 'mirror.globo.com'' on url http://mirror.globo.com/ubuntu/archive Error 'Couldn't resolve host 'ubuntu.c3sl.ufpr.br'' on url http://ubuntu.c3sl.ufpr.br/ubuntu Error 'Couldn't resolve host 'sft.if.usp.br'' on url http://sft.if.usp.br/ubuntuError 'Couldn't resolve host 'ubuntu.bhs.mirrors.ovh.net'' on url http://ubuntu.bhs.mirrors.ovh.net/ftp.ubuntu.com/ubuntuError 'Couldn't resolve host 'ubuntu.mirror.rafal.ca'' on url http://ubuntu.mirror.rafal.ca/ubuntuError 'Couldn't resolve host 'ftp.tecnoera.com'' on url http://ftp.tecnoera.com/ubuntu Error 'Couldn't resolve host 'mirror.overthewire.com.au'' on url http://mirror.overthewire.com.au/ubuntu Error 'Couldn't resolve host 'mirror.its.dal.ca'' on url http://mirror.its.dal.ca/ubuntu Error 'Couldn't resolve host 'ubuntu.mirror.gtcomm.net'' on url http://ubuntu.mirror.gtcomm.net/ubuntu Error 'Couldn't resolve host 'ubuntu-archive.locaweb.com.br'' on url http://ubuntu-archive.locaweb.com.br/ubuntuError 'Couldn't resolve host 'archive.ubuntu.com.ba'' on url http://archive.ubuntu.com.ba/ubuntu Error 'Couldn't resolve host 'gaosu.rave.org'' on url http://gaosu.rave.org/ubuntuError 'Couldn't resolve host 'mirror.cpsc.ucalgary.ca'' on url http://mirror.cpsc.ucalgary.ca/mirror/ubuntu.com/packages Error 'Couldn't resolve host 'mirrors.hust.edu.cn'' on url http://mirrors.hust.edu.cn/ubuntu Error 'Couldn't resolve host 'mirrors.163.com'' on url http://mirrors.163.com/ubuntu Error 'Couldn't resolve host 'mirrors.sohu.com'' on url http://mirrors.sohu.com/ubuntu Error 'Couldn't resolve host 'mirrors.hustunique.com'' on url http://mirrors.hustunique.com/ubuntu Error 'Couldn't resolve host 'mirrors.shlug.org'' on url http://mirrors.shlug.org/ubuntu Error 'Couldn't resolve host 'ubuntu.dormforce.net'' on url http://ubuntu.dormforce.net/ubuntu Error 'Couldn't resolve host 'mirrors.oss.org.cn'' on url http://mirrors.oss.org.cn/ubuntuError 'Couldn't resolve host 'ftp.fu-berlin.de'' on url ftp://ftp.fu-berlin.de/linux/ubuntuError 'Couldn't resolve host 'mirrors.ustc.edu.cn'' on url http://mirrors.ustc.edu.cn/ubuntuError 'Couldn't resolve host 'mirrors.yun-idc.com'' on url http://mirrors.yun-idc.com/ubuntuError 'Couldn't resolve host 'ubuntu.laps.ufpa.br'' on url http://ubuntu.laps.ufpa.br/ubuntu Error 'Couldn't resolve host 'mirror.easyspeedy.com'' on url http://mirror.easyspeedy.com/ubuntu Error 'Couldn't resolve host 'releases.ubuntu.spd.co.il'' on url http://releases.ubuntu.spd.co.il Error 'Couldn't resolve host 'repo.undip.ac.id'' on url http://repo.undip.ac.id/ubuntu Error 'RETR response: 550' on url ftp://ftp.cs.mun.ca/pub/mirror/ubuntu Error 'RETR response: 550' on url ftp://ftp.iitb.ac.in/distributions/ubuntu/archives Error 'Failed to connect to ubuntu.indika.net.id port 80: No route to host' on url http://ubuntu.indika.net.id/ubuntu Error 'Failed to connect to mirror.unej.ac.id port 80: Connection refused' on url http://mirror.unej.ac.id/ubuntu Error 'Couldn't resolve host 'mirror.lupaworld.com'' on url http://mirror.lupaworld.com/ubuntu Error 'Couldn't resolve host 'mirror.skyshe.com'' on url http://mirror.skyshe.com/ubuntu Error 'Could not resolve host: ubuntu-archive.polytechnic.edu.na' on url http://ubuntu-archive.polytechnic.edu.na/ubuntu Error 'Could not resolve host: ftp.psu.ac.th' on url http://ftp.psu.ac.th/pub/ubuntu .. at which point the process 'hangs' when closing mintsources gui the following output appears in the terminal.. File "/usr/lib/linuxmint/mintSources/mintSources.py", line 1087, in select_new_base_mirror url = self.mirror_selection_dialog.run(self.base_mirrors) File "/usr/lib/linuxmint/mintSources/mintSources.py", line 508, in run self._update_list() File "/usr/lib/linuxmint/mintSources/mintSources.py", line 434, in _update_list self._all_speed_tests() File "/usr/lib/linuxmint/mintSources/mintSources.py", line 440, in _all_speed_tests thread_id = thread.start_new_thread(self._speed_test, (self._mirrors_model, iter)) thread.error: can't start new thread Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error errno, errstr = error ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Unhandled exception in thread started by >Unhandled exception in thread started by >ValueErrorUnhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test ValueError: need more than 1 value to unpack Unhandled exception in thread started by > Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test Traceback (most recent call last): Traceback (most recent call last): errno, errstr = error Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test ValueError: : Traceback (most recent call last): need more than 1 value to unpack Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test need more than 1 value to unpack errno, errstr = error ValueErrorerrno, errstr = error Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test ValueError: ValueError: Unhandled exception in thread started by > Traceback (most recent call last): File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test ValueError: : need more than 1 value to unpack need more than 1 value to unpack errno, errstr = error errno, errstr = error ValueError: errno, errstr = error ValueError: need more than 1 value to unpack need more than 1 value to unpack errno, errstr = error File "/usr/lib/linuxmint/mintSources/mintSources.py", line 480, in _speed_test errno, errstr = error ValueError errno, errstr = error need more than 1 value to unpackneed more than 1 value to unpack : need more than 1 value to unpack ValueError: need more than 1 value to unpack ValueError: need more than 1 value to unpack ValueError: need more than 1 value to unpack