I have a similar problem, but only after I use X. I can su perfectly
fine before using X, and I can su perfectly fine while using X (and a
terminal window), but after exiting X, if I want to su, I have to reboot.
Ivan Voras wrote:
What could be the reasons for "su root" to not work?
I have a user that's in wheel group. Logging in as root works on the
console, but su-ing from the user just writes 'Sorry', like the
password's wrong. There are no clues in log files.
/etc/pam.d/su is identical to another machine where everything works ok.