Hi Robert,
Since yesterday I have the same trouble.
So I looked closer to the problem, and surprisingly it comes from pam.
Here is what I've found:
By strace'ing su I discovered that the time wasted at exit was due to a
huge ftruncate call (something was truncating the .xauth/root/your X
display file to about 1Gbyte, and then mmap'ing this in RAM) thus
driving the kernel crazy.
I then further discovered that this was the pam_xauth module that was
causing this. So I put it in debug (adding debug in the /etc/pam.d/su
file just in front of then pam_xauth line).
Then I grabbed the source, and had a look to them. I find that at some
point an uninitalized variable (a.size struct member) was used, so its
value could be anything.
Anyway, here is a patch if someone wants to include it:
--- pam_xauth.orig.cFri Feb 1 14:41:52 2002
+++ pam_xauth.c Fri Feb 1 14:44:25 2002
@@ -577,6 +577,7 @@
a.context=Source;
a.type=Map;
a.level=RdWr|Create;
+a.size=-1;
/* refcount may need to be up to 1 character larger; may need to
a trailing space and cookie if they aren't there to facilitate
upgrades from old versions that didn't keep track of the cookie
Brice Figureau
On Wed, 2002-01-30 at 13:06, Robert Fox wrote:
It's not really a problem, but lately (as of the latest Cooker) - when I
open a BASH terminal under KDE - then I su to root - do some stuff and
type exit, there is an echo of the word exit on the screen and an
unusual pause of several seconds before it returns to the normal use
account - and when I type exit from the normal windows there is another
pause.
This does not happen under a normal ASCII screen (Ctrl-Alt-F1) outside
of the X server.
Strange.
R.Fox
