This issue is caused by lightdm running /usr/sbin/lightdm-session
instead of /etc/X11/Xsession.
The simplest workaround for me was:
- introduce has_option functon as 1st step in Xsession.d sourced scripts
- as root create file /etc/X11/Xsession.d/01custom-has-option with following
content:
#check if has_option is already defined; if not, define
has_option 2>1 > /dev/null || has_option() {
# Ensure that a later no-foo overrides an earlier foo
if [ "$(echo "$OPTIONS" | grep -Eo "^(no-)?$1\>" | tail -n 1)" = "$1" ]; then
return 0
else
return 1
fi
}
- logout and login
Details:
- /etc/X11/Xsession introduces has_option shell function that check if
Xsession.options contains predefined option
- /etc/X11/Xsession sources all files under /etc/X11/Xsession.d in alphabetic
order
- as the scripts are sourced they maintain the same environemnt and definitions
of variables or functions as Xsession
- however, lightdm uses lightdm-session that also sources /etc/X11/Xsession.d/*
BUT does NOT define has_option function
- provided script checks if the function has_option already exists (Xsession is
in play) and if not (lightdm-session's game) it defines it the same way as is
in /etc/X11/Xsession
Alternative solutions:
- modify lightdm-session to contain has_option the same way as /etc/X11/Xsession
- modify (create) /etc/lightdm/lightdm.conf containing:
[Seat:*]
session-wrapper=/etc/X11/Xsession
- requires reboot; it did not work ok for 100% as my .profile env vars
were not correctly propagated
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Desktop Bugs, which is subscribed to gdm3 in Ubuntu.
https://bugs.launchpad.net/bugs/1922414
Title:
ssh-agent fails to start (has_option: command not found)
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https://bugs.launchpad.net/lightdm/+bug/1922414/+subscriptions
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