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    SubjectRe: X freezes kernel during exit [Re: 2.6.23-rc3-mm1]
    Removed (dead e-mail)

    On 09/09/2007 02:47 PM, Andrew Morton wrote:
    > On Sun, 09 Sep 2007 13:44:56 +0200 Jiri Slaby <> wrote:
    >> On 08/28/2007 01:41 PM, Jiri Slaby wrote:
    >>> Does this went through to your boxes? Any progress, clue, idea?
    >>> Jiri Slaby napsal(a):
    >>>> Andrew Morton napsal(a):
    >>>> Hi,
    >>>> I've found a regression against 2.6.23-rc2-mm2. X server shutdown freezes
    >>>> (untainted) kernel hardly. Nothing on netconsole, X output follows:


    sorry, both netconsole and my usb devices (including my keyboard -- no numlock
    led switch) are dead. The trace I've taken appears on the screen after a while.

    >>>> X Window System Version 1.3.0
    >>>> Release Date: 19 April 2007
    >>>> X Protocol Version 11, Revision 0, Release 1.3
    >>>> Build Operating System: Fedora Core 7 Red Hat, Inc.
    >>>> Current Operating System: Linux bellona 2.6.23-rc3-mm1 #315 SMP Wed Aug 22
    >>>> (**) RADEON(0): RADEONDRICloseScreen
    >>>> the only difference is, that 2.6.23-rc2-mm2 writes further
    >>>> FreeFontPath: FPE "/usr/share/X11/fonts/misc:unscaled" refcount is 2, should be
    >>>> 1; fixing.
    >>>> and exits succesfully (note that these messages are taken on remote host, X
    >>>> runned remotely).
    >>>> Both vesa and radeon + Option "NoAccel" "true" works obviously fine.
    >> Also intel on integrated i915 causes this (NoAccell has no effect in this case).
    >> Note that also 2.6.23-rc4-mm1 is affected by this behaviour.
    >> I have a trace for you:
    >> (this is the only what I'm able to grab so far)
    > afacit everything on that call trace is good. I guess it's possible that
    > one of the higher-level loops has gone infinite (eg, the one in
    > agp_remove_controller()).

    There is no loop in this function. Anyway, going to track this whole issue down.
    Hold on.

    > Are you able to get netconsole working, and run sysrq-P and sysrq-T
    > ten or so times, see if it's always stuck in the same place on the
    > same CPU?

    thanks so far,
    Jiri Slaby (
    Faculty of Informatics, Masaryk University
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