Re: [2.6.9-rc2] ALSA nm256 driver causes system lockup

[Takashi Iwai <tiwai@suse.de>]

At Tue, 28 Sep 2004 17:55:14 +0200,
Jan De Luyck wrote:
> 
> On Tuesday 28 September 2004 17:48, Takashi Iwai wrote:
> > At Tue, 28 Sep 2004 14:47:17 +0200,
> >
> > Jan De Luyck wrote:
> > > Hello list,
> > >
> > > I'm trying to configure a laptop (Dell Latitude CXs) with 2.6.9-rc2. All
> > > runs well, except the ALSA nm256 driver for the Neomagic Audio chip.
> > > Loading this driver results in an immediate and complete system
> > > lockup....
> > >
> > > I've tried appending "vaio_hack=1" on the kernel command line, but that
> > > didn't really do anything.
> > >
> > > ALSA is compiled as modules.
> > >
> > > Any pointers?
> >
> > Try to load snd-nm256 driver before X.  The chip uses the video RAM
> > for the sound buffer.  It seems that X clears all video RAM that
> > confuses the sound driver.  I.e. if you already started X, there is no
> > way back :)
> 
> Yups, so I read in the documentation accompanying the kernel. It's being 
> loaded by hotplug during bootup, but even at that early stage it locks up 
> completely.

Does changing latitude_workaround = 0 in nm256.c have any influence?


Takashi