Transmissions starts but does not download or save any changes

there will be a config folder in ~/.config just rename the transmission folder after renaming it, when you run the app you will get vanilla settings

@actionparsnip I tried that and, even though setting got reset, if I change something it's not saved.

Can you give the output of:

lsb_release -a; apt-cache policy transmission

Thanks

lsb_release -a; apt-cache policy transmission

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty
transmission:
  Installed: (none)
  Candidate: 2.13-0ubuntu8
  Version table:
     2.13-0ubuntu8 0
        500 http://ua.archive.ubuntu.com/ubuntu/ natty/universe amd64 Packages

Could try:

sudo add-apt-repository ppa:transmissionbt/ppa; sudo apt-get update; sudo apt-get -y upgrade

May help

Can you also give the output of:

mount

Thanks

I'm aware of ppa, but I'd like to try fix installation from main repository, sorry.
Here is mount output:

/dev/sda8 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
/dev/sda5 on /boot type ext4 (rw,commit=0)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
/dev/sdb on /media/backup type ext4 (rw,nosuid,nodev,uhelper=udisks)
/dev/sda7 on /media/mainland type ext3 (rw,nosuid,nodev,uhelper=udisks)
gvfs-fuse-daemon on /home/skfd/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=skfd)

Thanks! Turns out it was something with UPnP. I just had to wait for 20 minutes until it stopped trying to reach bloody router. And after that Transmission is usable again. Turned of UPnP imminently!

Thanks Federico Tello Gentile, that solved my question.