Hi Sergio, thanks for the backtrace; looks like it also involves
compPaintWindowBackground.  It would be helpful if you installed -dbg
versions of xserver and your video driver, to try and get additional
details on the crash.

Yes, I dropped -intel as an involved package because reports have
indicated that the same problem affects other drivers beyond -intel (S3
for instance).  Also, from the backtraces we aren't yet seeing a failure
in driver code.  It may very well end up being a driver issue, but we
don't yet have solid enough evidence of that yet.

The following is at the end of the xfce-terminal strace:

connect(4, {sa_family=AF_FILE, path="/tmp/.X11-unix/X0"}, 19) = 0
...
write(4, "[EMAIL PROTECTED]@B\17\0", 24) = 24
read(4, "\34P\236\1 [EMAIL PROTECTED]"..., 32) = 32
read(4, "\34P\236\1 [EMAIL PROTECTED]"..., 32) = 32
read(4, "\34P\236\1 [EMAIL PROTECTED]"..., 32) = 32
read(4, "\34P\236\1 [EMAIL PROTECTED]"..., 32) = 32
read(4, "\25\0\236\1 [EMAIL PROTECTED] [EMAIL PROTECTED]"..., 32) = 32
read(4, "\34P\236\1E\0\0\0\37\1\0\0_\274K\326\0\1\0\0\2\0\0\0\0"..., 32) = 32
read(4, "\34P\236\1E\0\0\0Z\1\0\0_\274K\326\0\1\0\0\2\0\0\0\0\0"..., 32) = 32
read(4, "\34P\236\1 [EMAIL PROTECTED]"..., 32) = 32
read(4, "\26\0\236\1 [EMAIL PROTECTED] [EMAIL 
PROTECTED]"\r\340\0\6\0\33\0\341\2\312\1"..., 32) = 32
read(4, "\226\216\236\1 [EMAIL PROTECTED] [EMAIL PROTECTED]"..., 32) = 32
read(4, 0xbfcadbfc, 32)                 = -1 EAGAIN (Resource temporarily 
unavailable)
poll([{fd=4, events=POLLIN, revents=POLLIN|POLLERR|POLLHUP}], 1, -1) = 1
read(4, 0xbfcadbfc, 32)                 = -1 ECONNRESET (Connection reset by 
peer)
write(2, "xfce4-terminal: Fatal IO error 1"..., 96) = 96
close(7)                                = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
sigreturn()                             = ? (mask now [])
kill(4959, SIGTERM)                     = 0
exit_group(1)                           = ?

I notice that first write() statement is writing 24 bits...  I wonder if
that relates at all to the 16/24 DefaultDepth distinction being noticed
with this bug.

But anyway, the connection to X is dying after doing some IO with it.
Unfortunately the backtraces so far have not pinpointed where in the
server this IO is being received, so it's hard to identify why it is
causing a crash.  So we'll definitely need to have someone install -dbg
versions and run gdb against this to get a backtrace (and maybe step
through code to identify what lines are involved.)

-- 
i810 + xorg = xfce crashes when opening terminal
https://bugs.launchpad.net/bugs/91849
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