From: Michel Bouissou <michel@bouissou.net>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>,
linux-kernel@vger.kernel.org
Subject: Re: Kernel 2.6.12 + IO-APIC + uhci_hcd = Trouble
Date: Tue, 12 Jul 2005 09:54:59 +0200 [thread overview]
Message-ID: <200507120954.59522@totor.bouissou.net> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0507112142420.7520-100000@netrider.rowland.org>
Le Mardi 12 Juillet 2005 03:54, Alan Stern a écrit :
> > So the problem is circled to 2.6 kernel, uhci_hcd and UP IO-APIC.
>
> Don't rule out the hardware too quickly. 2.4 and 2.6 manage the UHCI
> controllers in different ways.
I saw ;-)
> In particular, the usb-uhci driver in 2.4 does not suspend the controller
> when no devices are attached, whereas uhci-hcd in 2.6 does. (So does the
> "alternate" uhci driver in 2.4.) [...]
> To try and help pin things down, tomorrow (i.e., Tuesday) I'll send you a
> test patch to completely disable the UHCI controllers, leaving them awake
> and idle, not generating interrupts. If you still get those spurious
> IRQs, they will have to come from somewhere else. (Assuming you can
> devote server time to this sort of testing...)
I'll try my best, although I will have little time for playing with this until
the end of this week, and will be on travel next week. But if you send me a
test patch, I'll try my best to test it.
Cheers.
--
Michel Bouissou <michel@bouissou.net> OpenPGP ID 0xDDE8AC6E
next prev parent reply other threads:[~2005-07-12 7:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-10 18:50 Kernel 2.6.12 + IO-APIC + uhci_hcd = Trouble Protasevich, Natalie
2005-07-11 9:06 ` Michel Bouissou
2005-07-11 18:36 ` Alan Stern
2005-07-11 19:33 ` [SOLVED ??] " Michel Bouissou
2005-07-11 19:43 ` Alan Stern
2005-07-11 20:02 ` Michel Bouissou
2005-07-11 20:16 ` Alan Stern
2005-07-11 20:46 ` Michel Bouissou
2005-07-11 20:58 ` Michel Bouissou
2005-07-11 21:21 ` [NOT solved] " Michel Bouissou
2005-07-11 21:21 ` [SOLVED ??] " Alan Stern
2005-07-11 21:34 ` Michel Bouissou
2005-07-12 1:54 ` Alan Stern
2005-07-12 7:54 ` Michel Bouissou [this message]
2005-07-12 14:12 ` Alan Stern
2005-07-12 17:03 ` Michel Bouissou
2005-07-12 18:15 ` Alan Stern
2005-07-12 18:16 ` Michel Bouissou
2005-07-12 18:57 ` Alan Stern
2005-07-12 20:40 ` Michel Bouissou
2005-07-12 21:37 ` Alan Stern
2005-07-12 22:01 ` Michel Bouissou
-- strict thread matches above, loose matches on Subject: below --
2005-07-12 23:16 Protasevich, Natalie
2005-07-13 6:46 ` Michel Bouissou
2005-07-12 21:02 Protasevich, Natalie
2005-07-10 8:11 Michel Bouissou
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