I've the same issue which I can reproduce on my laptop.
1. Start system
2. Start pidgin
3. Let the laptop go to hibernate mode
4. Wakeup the laptop
5. Another instance of pidgin is zombie
wados@dell:~/$ uname -a
Linux dell 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
wados@dell:~/$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
wados@dell:~/$ dpkg -l | grep pidgin
ii pidgin 1:2.10.9-0ubuntu7.1 amd64 graphical multi-protocol instant messaging client for X
ii pidgin-data 1:2.10.9-0ubuntu7.1 all multi-protocol instant messaging client - data files
ii pidgin-libnotify 0.14-9ubuntu2 amd64 display notification bubbles in pidgin
ii pidgin-sipe 1.13.3-1 amd64 Pidgin protocol plugin to connect to MS Office Communicator
ii pidgin-themes 0.2-1 all Smiley themes collection for pidgin
wados@dell:~/$ ps aux|grep Z
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
wados 9858 0.0 0.0 0 0 ? Z 10:29 0:00 [pidgin.orig] <defunct>
I've the same issue which I can reproduce on my laptop.
1. Start system
2. Start pidgin
3. Let the laptop go to hibernate mode
4. Wakeup the laptop
5. Another instance of pidgin is zombie
wados@dell:~/$ uname -a
Linux dell 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
wados@dell:~/$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
wados@dell:~/$ dpkg -l | grep pidgin
ii pidgin 1:2.10.9-0ubuntu7.1 amd64 graphical multi-protocol instant messaging client for X
ii pidgin-data 1:2.10.9-0ubuntu7.1 all multi-protocol instant messaging client - data files
ii pidgin-libnotify 0.14-9ubuntu2 amd64 display notification bubbles in pidgin
ii pidgin-sipe 1.13.3-1 amd64 Pidgin protocol plugin to connect to MS Office Communicator
ii pidgin-themes 0.2-1 all Smiley themes collection for pidgin
wados@dell:~/$ ps aux|grep Z
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
wados 9858 0.0 0.0 0 0 ? Z 10:29 0:00 [pidgin.orig] <defunct>