How to repeat the problem: assume we can connect to a provider using
"sudo pppd call xyz" command, i.e. we have a script /etc/ppp/peers/xyz
for connect.
Add "updetach" option to the script. Next, invoke:
sudo pppd call xyz
The connection hangs up immediately after finish of the above "sudo" command.
On the other hand, if you invoke:
sudo bash
pppd call xyz
the modem does not hang up.
Reason: call of setsid() function added by always_setsid patch. More info I
wrote in Debian bug tracking system.
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https://bugs.launchpad.net/bugs/776193
Title:
updetach option gives modem hangup
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