Panic when starting X with Intel KMS

    Hi,

    I'm having panics or hard freezes when starting X with an Intel 
video card. The machine is able to start old X+twm without problems but 
when I try gnome3 (in normal or fallback mode, doesn't matter) the 
machine panics or hard freezes.

    This doesn't happen when running X with vesa. With vesa the gnome is 
able to start in fallback (no composition) mode. Also, an old i386 with 
an nvidia card is able to run that gnome3 with composition so I'd say it 
has to do with the intel card.

    These are the specs of the machine:

      FreeBSD 10.0-CURRENT #4 r+3dc57aa: Wed Jul 17 15:13:07 CEST 2013
      root_at_portgus:/usr/obj/usr/src/sys/CUSTOM amd64
      FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
      RAM: 8GB
      Video Card: Intel chipid=0x00468086

    The debugging knobs in the kernel config are there. I can also 
confirm that I can break to the debugger with CTRL+ALT+ESC before 
starting X. The world was build without debug symbols.

    Because the machine runs with an Intel card, I had to use my $work 
dockstation to obtain a serial port and do the debug via serial port 
with another machine.

   When starting X, either the machine freezes hard (and so no 
CTRL+ALT+ESC) or the machine panics. It has never executed X without 
panics or freezes.

    I was able to obtain a core dump, the results are at:

         https://dl.dropboxusercontent.com/u/2094962/core.txt.4

    I was unable to dive any further because the dump only shows the 
kernel side of things. The bt only seems to show the kernel side and the 
user side of things seems to be corrupt.

    Any other info I can obtain from the machine in the moment of the 
panic, let me know. I can easy do the debug via serial port.

    Gus

-- 
    Salut i força,

    Gustau

---------------------------------------------------------------------------
Prou top-posting :	http://ca.wikipedia.org/wiki/Top-posting
Stop top-posting :	http://en.wikipedia.org/wiki/Posting_style	

O O O Gustau Pérez i Querol
O O O Unitat de Gestió dels departaments
O O O Matemàtica Aplicada IV i Enginyeria Telemàtica

       Universitat Politècnica de Catalunya
       Edifici C3 - Despatx S101-B
  UPC  Campus Nord UPC
       C/ Jordi Girona, 1-3
       08034 - Barcelona