freebsd7, radeon, xorg-server -> deadlock or so

[Robert Noland]

On Tue, 2010-02-09 at 19:43 -0800, Norbert Papke wrote:
> On February 9, 2010, Robert Noland wrote:
> > On Wed, 2010-02-10 at 01:36 +0100, O. Hartmann wrote:
> > > The situation is heavily unsatisfying, since one need an expensive
> > > AMD/ATi Radeon card to gain non-3D poor functionality, where a cheaper
> > > one should be do the same - but the cheaper ones don't work. Even if one
> > > uses AMD64, the situattion is worse and I have no reason using
> > > Linux-driver on a FreeBSD box. Hope the situation gets cleared in the
> > > nearest future. It's a kind of deadlock. As I said, either spenig a lot
> > > of money for a working RV770 based AMD graphics card with poor
> > > functionality or nothing so far, since most smaller RV730 chips aren't
> > > supported properly by the most recent drivers.
> > 
> > I'm only aware of one issue which leads to corruption.  I have patches
> > that resolve that issue which are not yet committed.  If your are
> > experiencing lockups with DRI disabled, then something very strange is
> > going on and you will need to provide more details.  I don't remember
> > exactly what drm code I have committed to 7 right now, but it should be
> > fairly current as I don't think I have much in the way of outstanding
> > MFCs.  The current drm and radeon drivers work on every card that I
> > have, which in the r600 class are HD 3650,3850,4650.
> 
> I think the variable include more than just the model of graphics card.  I 
> just replaced my motherboard, keeping all other components, disks, software 
> and configuration.  With the old motherboard my HD 3650 was working great 
> including 3D acceleration.  With the new board, X will hang/crash with DRI 
> enabled.  Even with DRI disabled, I still experience problems with the screen 
> not updating unless I wiggle the mouse.

Ah, this suggest an issue with interrupts.  If the driver is blocked
waiting on an event, moving the mouse will interrupt the driver and
force it to update.

robert.

> The new mother board is an ASUS P5E3 Pro with an Intel X48 Northbridge.
> 
> The severity of the hang requires a hard reset (fortunately ZFS is 
> resilient!).  No xorg log file is generated/preserved, nor is it possible to 
> break to the debugger.  I do not have a serial console.  This makes it 
> difficult to debug.  What could I do to shed more light on this situation?
> 
> Cheers,
> 
> -- Norbert Papke.
>    npapke at acm.org
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-- 
Robert Noland <rnoland at FreeBSD.org>
FreeBSD