Panic or deadlock with Intel graphics

Tijl Coosemans tijl at
Fri Aug 27 10:13:16 UTC 2010

On Thursday 26 August 2010 05:55:42 Rem P Roberti wrote:
> In an attempt to diagnose why my Thinkpad R51 completely locks up when
> trying to access X I have done the following.  I built a debugging
> kernel, with KDB, DDB, WITNESS, INVARIANT*, AND DIAGNOSTIC in addition
> to *BREAK_TO_DEBUGGER.  None of these things have yielded any progress
> in isolating the issue.  Note that replacing the 'intel' driver with the
> 'vesa' driver in /etc/X11/xorg.conf does not cause the computer to
> hang.  The problem appears to be specific to the intel driver.  Also, I
> have been unable to get a crash report (which is what we were hoping to
> see in /var/crash) regardless of the debugging options built into the
> kernel.
> I have attached the output of 'uname -a', 'dmesg', and 'pciconf -lv' to
> this post.

It could be related to DRI, so try to disable it in /etc/X11/xorg.conf:

Section "Module"
        Disable  "dri"
        Disable  "dri2"
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