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Date:      Mon, 30 Mar 2009 11:53:26 +0100
From:      "N.J. Mann" <njm@njm.me.uk>
To:        freebsd-x11@freebsd.org, Robert Noland <rnoland@freebsd.org>
Subject:   Re: Xorg 7.4 crashes on exit
Message-ID:  <20090330105326.GA920@titania.njm.me.uk>
In-Reply-To: <20090227141146.GA88783@titania.njm.me.uk>
References:  <200903250150.n2P1ou4g062376@svn.freebsd.org> <20090325092904.GA2801@titania.njm.me.uk> <1237999344.1828.6.camel@balrog.2hip.net> <20090227141146.GA88783@titania.njm.me.uk>

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Hi Robert,


[Moved from svn-src-all@ to x11@ to merge threads.]

In message <1237999344.1828.6.camel@balrog.2hip.net>,
	Robert Noland (rnoland@FreeBSD.org) wrote:
> On Wed, 2009-03-25 at 09:29 +0000, N.J. Mann wrote:
> > In message <200903250150.n2P1ou4g062376@svn.freebsd.org>,
> > 	Robert Noland (rnoland@FreeBSD.org) wrote:
> > > Author: rnoland
> > > Date: Wed Mar 25 01:50:56 2009
> > > New Revision: 190401
> > > URL: http://svn.freebsd.org/changeset/base/190401
> > > 
> > > Log:
> > >   Rework the management of vblank interrupts a bit.
> > >   
> > >   When a vt switch occurs the irq handler is uninstalled.  Interrupts
> > >   and the state tracking of what was enabled/disabled wasn't working
> > >   properly.  This should resolve the reports of "slow windows" after a
> > >   vt switch, among other things.  The radeon 2d driver seems to work a
> > >   bit more correctly than the Intel driver.  With the Intel driver,
> > >   vblank interrupts will be enabled at system startup and will only
> > >   be disabled after an additional modeset (vt switch, dpms, randr event).
> > >   
> > >   With this patch, I am able to run glxgears synced to vblank and
> > >   vt switch while it is running without ill effects.
> > >   
> > >   MFC after:	3 days
> > > 
> > > Modified:
> > >   head/sys/dev/drm/drm_irq.c
> > 
> > Is this a possible cure for the problem I reported here:
> > http://lists.freebsd.org/pipermail/freebsd-x11/2009-February/007670.html
> 
> It could be... interrupts were not working correcty, especially on
> Intel.  There is likely still an issue with restarting X that I need to
> look into, but I've not seen a problem vt switching or shutting down.

Okay I tried out your recent changes this morning.

First I did a svn update to r190540 to bring my sources up to date and
then I built a new 7-Stable world and kernel and installed them.  Sadly,
I still got the video mode corruption on exiting X or switching from X
to a VT.  I then merged all the changes from head/sys/dev/drm to
stable/7/sys/dev/drm and tried again.  Unfortunately, I got the same
results.  (Xorg.log and dmesg.boot available if required.)  The changes
I merged were: 190020, 190021, 190022, 190023, 190123, 190124, 190125,
190163, 190164, 190166, 190170, 190282, 190399, 190400, 19401 and
190433.  Some of these were probably not relevant, but I did everything
to make it easier for me.  (I am very much still testing the water with
svn and this was the first time I tried doing a merge!)

Any ideas where to go from here?


Cheers,
       Nick.
-- 




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