Could this be a kernel problem?
I have been using 2.4.21-preX and 2.5.6X and all show for me the same
behaviour, with IO-APIC enabled or not.
It reminds me the problem I have with my Promise controller
which after a while if I have dma enabled it completely locks my machine.
What kernel are you using at the moment to just try and test it?
My system is an Athlon 600, on an ASUS K7V with KX133, Matrox G400 and a
Live!
Regards
Panagiotis Papadakos
On Sat, 4 Apr 2003, Michel [ISO-8859-1] Dänzer wrote:
> On Fre, 2003-04-04 at 22:38, Eric Anholt wrote:
> > On Fri, 2003-04-04 at 11:12, Panagiotis Papadakos wrote:
> > > For some months now I am experiencing lockups when I switched to the VTs,
> > > or changed the video modes or if I tried to shutdown the Xserver.
> > >
> > > So I applied the following patch, after looking the related radeon patch
> > > and now I can switch to the VTs or change the videomode without lockups.
> > > But when I press Ctrl+Alt+Delete, sometimes my machine will lockup before
> > > kdm starts a new Xserver or it will lockup right away after my monitor
> > > has received the signal from the new Xserver.
> > >
> > > If I kill the kdm process and then restart it everything will be ok. (At
> > > least when I tried it)
> > >
> > > So can anyone please help?
> > >
> > > This is the patch:
> > >
> > > --- mga_dri.c 2003-04-04 22:02:21.000000000 +0300
> > > +++ mga_dri.c_new 2003-04-04 16:26:31.000000000 +0300
> > > @@ -1359,6 +1359,7 @@
> > > if (pMga->irq) {
> > > drmCtlUninstHandler(pMga->drmFD);
> > > pMga->irq = 0;
> > > + pMga->reg_ien = 0;
> > > }
> > >
> > > /* Cleanup DMA */
> >
> > Can anyone explain to me what exactly this patch or the one for radeon
> > do? My guess/understanding is that this prevents interrupts from being
> > reenabled on server reset before the irq handler is readded.
>
> That's my understanding as well.
>
> > But why does this cause a hang?
>
> I'm not sure, maybe some kernels and/or machines don't like the
> interrupt being enabled without the handler being installed. I couldn't
> reproduce the problem on my Macs.
>
>
> --
> Earthling Michel Dänzer \ Debian (powerpc), XFree86 and DRI developer
> Software libre enthusiast \ http://svcs.affero.net/rm.php?r=daenzer
>
>
>
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