linux-kernel - Re: ata_piix, laptop cdrom, ICH7: EH, limiting speed to PIO

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Message-ID: <ac0be4d70709170257o62e856f4re049c968ab5590a7@mail.gmail.com>
Date:	Mon, 17 Sep 2007 13:57:43 +0400
From:	"Sergey Dolgov" <dolgovs@...il.com>
To:	"Tejun Heo" <htejun@...il.com>
Cc:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: ata_piix, laptop cdrom, ICH7: EH, limiting speed to PIO

On 9/16/07, Tejun Heo <htejun@...il.com> wrote:
> Michal Piotrowski wrote:
> > Sergey Dolgov pisze:
> >> On Wed, Sep 12, 2007 at 10:19:03PM +0200, Michal Piotrowski wrote:
> >>> Sergey Dolgov pisze:
> >>>> Hi Michal,
> >>>>
> >>>> On Wed, Sep 12, 2007 at 06:33:20PM +0200, Michal Piotrowski wrote:
> >>>>> Hi Sergey,
> >>>>>
> >>>>> On 11/09/2007, Sergey Dolgov <dolgovs@...il.com> wrote:
> >>>>>> Hi!
> >>>>>>
> >>>>>> On my hp nx7300 laptop, 2 following scenarios can happen during bootup
> >>>>>> (see attachments for the full logs): the "good" one [1] and the one
> >>>>>> where multiple EHs lead to limiting the speed [2].
> >>>>>>
> >>>>>> [1] one is more rare, but it seems to be persistent over reboots: once
> >>>>>> it happened, just rebooting the machine always results in behaviour
> >>>>>> like [1].
> >>>>>>
> >>>>>> [1] results in a working cdrom from the start. An attempt to use cdrom
> >>>>>> after [2] happened results in even more EHs, resulting in "configured
> >>>>>> for PIO4", after which the cdrom is finaly working.
> >>>>>>
> >>>>>> The version I'm using is 2.6.23-rc6, but the same used to happen with
> >>>>>> the previous rc's, and probably with 2.6.22 too (I can check).
> >>>>> It would be great if you could check it.
> >>>> I've just built 2.6.22.6 with basically the same configuration, and
> >>>> the behaviour is just the same, i.e. both [1] and [2] still can
> >>>> happen.
> >>> Ok, thanks.
> >>>
> >>> BTW please check cables and PCU.
> >> What's a PCU?
> >
> > s/PCU/PSU - power supply unit
> >
> >> BTW, this only happens when using libata of course. The
> >> old CONFIG_IDE stuff works fine every time.
> >
> > This maybe one of libata weirdness (I really don't get it why some hardware
> > works perfectly fine with an old IDE and don't work well with libata).
>
> Hmmm... Is MWDMA2 mode used with ide driver too?
>

What's the best way to tell whether it does or not? (the log says
"selected mode 0x22", see below)

[    9.267682] ICH7: IDE controller at PCI slot 0000:00:1f.1
[    9.267776] ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 16 (level,
low) -> IRQ 16
[    9.267928] ICH7: chipset revision 1
[    9.267998] ICH7: not 100% native mode: will probe irqs later
[    9.268088]     ide0: BM-DMA at 0x40a0-0x40a7, BIOS settings:
hda:DMA, hdb:pio
[    9.268286] Probing IDE interface ide0...
[    9.301139] USB Universal Host Controller Interface driver v3.0
[    9.307592] SCSI subsystem initialized
[    9.325583] libata version 2.21 loaded.
[    9.331069] Clocksource tsc unstable (delta = -127737806 ns)
[    9.333292] hda: HL-DT-ST DVDRAM GSA-T10N, ATAPI CD/DVD-ROM drive
[    9.333533] PM: Adding info for No Bus:ide0
[    9.335577] hda: selected mode 0x22
[    9.336161] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14

-- 
Sergey
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