linux-kernel - Re: ACPI undocking on 3.8-rc5 no longer works with Lenovo T61

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Date:	Thu, 14 Mar 2013 13:17:51 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Zdenek Kabelac <zkabelac@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, joe@...ches.com,
	isimatu.yasuaki@...fujitsu.com, rafael.j.wysocki@...el.com
Subject: Re: ACPI undocking on 3.8-rc5 no longer works with Lenovo T61

On Sat, 2013-03-09 at 18:40 -0300, Henrique de Moraes Holschuh wrote:
> On Thu, 07 Mar 2013, Toshi Kani wrote:
> > dock.0 on your Lenovo likely shows as "battery_bay", which I think you
> > cannot undock regardless of this patch.  Can you try to undock the one
> 
> You're supposed to be able to undock any thinkpad battery just fine, and it
> used to work on older firmware such as the one in the T61.  If this is
> broken, some other bugs may be at play.

Agreed.  Let's look at the error messages...

Dne 29.1.2013 11:46, Zdenek Kabelac napsal(a):
> Dmesg shows this:
>
> [ 2657.087414] ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: undocking

The dock driver called _DCK, which was successful.  So, the dock driver
did its job.

> [ 2658.613494] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action
0x6 frozen

This message came from ata_eh_link_report(), which indicates that there
was an ATA link error detected.

> [ 2658.613508] ata4.00: ST_FIRST: !(DRQ|ERR|DF)
> [ 2658.613522] sr 3:0:0:0: CDB:
> [ 2658.613530] Get event status notification: 4a 01 00 00 10 00 00 00
08 00
> [ 2658.613583] ata4.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0
pio
> 16392 in
>           res 00/00:00:00:00:00/00:00:00:00:00/00 Emask 0x2 (HSM
violation)
> [ 2658.613670] ata4: soft resetting link
> [ 2658.766888] ata4.00: NODEV after polling detection

This indicates that the target device, which I think the battery bay,
was gone.

> [ 2658.766900] ata4.00: revalidation failed (errno=-2)
>

So, it looks to me that the battery bay was undocked, but an ATA link
error was detected.  This could be either a new FW causing the ATA link
error or the ATA stack detecting the link error which didn't before.

Thanks,
-Toshi

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