Re: Broken sata (VIA) on Asus A8V (kernel 2.6.14+)

[Tejun Heo <htejun@gmail.com>]

Vladimir B. Savkin wrote:
> On Thu, Feb 02, 2006 at 08:08:07AM +0900, Tejun Heo wrote:
>
> > Vladimir B. Savkin wrote:
> >
> > > Hello!
> > >
> > > My system based on Asus A8V (VIA chipset) works fine with 2.6.13.3,
> > > but after upgrading (kernels 2.6.14.7 and 2.6.15.1 tried) it
> > > gaves error messages some minutes after boot.
> > >
> > > The messages are as following:
> > > ata2: command 0xXX timeout, stat 0x50 host_stat 0x4
> > > where XX gets different values from time to time, 0x25 mostly.
> > > I/O to this controller halts after that.
> > >
> > > Attached are boot dmesg log and lspci output.
> >
> > How reproducible is the problem?  With how much certainty can you say 
> > the problem is introduced by newer kernels?  e.g. If the problem occurs 
> > most of the time with 2.5.15.1 but it stops happending after switching 
> > back to 2.6.13.3, you can be pretty sure.
>
>
> Highly reproducible: months vs. minutes of uptime.

Your BMDMA controller is reporting raised interrupt (0x4) and your drive 
is saying that it's ready for the next command, yet interrupt handler of 
sata_via hasn't run and thus the timeout.  It looks like some kind of 
IRQ routing problem to me although I have no idea how the problem 
doesn't affect the boot process.

Can you try to boot with boot parameter pci=noacpi?

--
tejun
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