I have found a solution of the described problem:
I had have this additional entries in my /etc/sudoers:
# Allow proxy environment variables to pass through Defaults env_keep="no_proxy NO_PROXY" Defaults env_keep+="all_proxy ALL_PROXY" Defaults env_keep+="http_proxy HTTP_PROXY" Defaults env_keep+="https_proxy HTTPS_PROXY" Defaults env_keep+="ftp_proxy FTP_PROXY"
After deleting this two entries
Defaults env_keep="no_proxy NO_PROXY" Defaults env_keep+="all_proxy ALL_PROXY"
kdesudo works again.
Note, the environment variables NO_PROXY ans ALL_PROXY are not defined for my normal users, so perhaps this was the reason, why kdesudo fails in Kubuntu 12.04.
See also https://bugs.launchpad.net/kdesudo/+bug/989577
I have found a solution of the described problem:
I had have this additional entries in my /etc/sudoers:
# Allow proxy environment variables to pass through ="all_proxy ALL_PROXY" ="http_ proxy HTTP_PROXY" ="https_ proxy HTTPS_PROXY" ="ftp_proxy FTP_PROXY"
Defaults env_keep="no_proxy NO_PROXY"
Defaults env_keep+
Defaults env_keep+
Defaults env_keep+
Defaults env_keep+
After deleting this two entries
Defaults env_keep="no_proxy NO_PROXY" ="all_proxy ALL_PROXY"
Defaults env_keep+
kdesudo works again.
Note, the environment variables NO_PROXY ans ALL_PROXY are not defined for my normal users, so perhaps this was the reason, why kdesudo fails in Kubuntu 12.04.
See also https:/ /bugs.launchpad .net/kdesudo/ +bug/989577