ubuntu-x-swat team mailing list archive

[boblinux <620278@xxxxxxxxxxxxxxxxxx>]

Hello,

So, here is my report - not exactly the one we assumed : however :

last friday evening, reading briefly the doc, I understood that
attaching gdb to X was dead simple, so I tried - and X froze -
completely - it was late, thus I dropped it, and resumed the debug
session now.

It kept freezing. meanwhile, looking closely to the situation, I noticed
that the doc mentions attaching to /usr/bin/Xorg; however, on my Ubuntu
10.04 (I have two desktops at home, one x86_64 and one i686), ps
-ef|grep X shows /usr/bin/X running, not /usr/bin/Xorg; I verified more
closely :

/usr/bin/X is brought by xserver-xorg, which claims :

" This package depends on the full suite of the server and drivers for the
 X.Org X server.  It does not provide the actual server itself."

Really ?

whereas /usr/bin/Xorg is brought by xserver-xorg-core : and we have
xserver-xorg-core-dbg, but no xserver-xorg-dbg, which can explain why,
before freezing X, gdb claimed it found no symbols when attaching to X
...

comparing X and Xorg :

-rwsr-sr-x 1 root root    10,520 2010-04-09 04:07 /usr/bin/X
-rwxr-xr-x 1 root root 1,901,280 2010-07-21 15:08 /usr/bin/Xorg

two completely different executables : one with the sticky bit set, and
so tiny !

This situation looks messy : don't you think ?

I just connected through VPN at work : on CentOS 5.5, it's definitely
/usr/bin/Xorg - which seems consistent with today's fashion (I am an old
timer, remember ? I knew X11R6 on HP-UX and SunOS, not to mention
Solaris)

just to give it a try, in /etc/kde4/kdm/kdmrc, I replaced

ServerCmd=/usr/bin/X

with

ServerCmd=/usr/bin/Xorg

and restartedkdm

** Attachment added: "output from : gdb /usr/bin/X 2>&1 | tee gdb-X"
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/620278/+attachment/1511275/+files/gdb-X

-- 
random Xorg crash
https://bugs.launchpad.net/bugs/620278
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