From: Oliver Hartkopp <socketcan@hartkopp.net>
To: "Michael Jäntsch" <michael.jaentsch@in.tum.de>
Cc: linux-can@vger.kernel.org
Subject: Re: [Socketcan-users] Message stalls in SocketCan Layer?
Date: Fri, 03 Feb 2012 17:57:03 +0100 [thread overview]
Message-ID: <4F2C11DF.7010707@hartkopp.net> (raw)
In-Reply-To: <4F2C0675.1050808@in.tum.de>
Hi Michael,
On 03.02.2012 17:08, Michael Jäntsch wrote:
> yes, it all started when I switched to kernel 3.0.0-15-generic. However,
> weirdly enough there is one computer with this kernel where the problem
> doesn't appear and two where it does. I think I will confirm this by
> going back to an older kernel and seeing if the problem disappears.
please consider that if it works on other machines with the same kernel that
there could be some changes within the USB subsystem or some interrupt or
ACPI/powersaving issues too.
Going back to an older Kernel is a good check - don't know, if you also can go
further (3.1, 3.2) with Ubuntu 11.10 too ?!?
Maybe there's some USB debugging available to check whether the URB has been
sent properly to the USB wire and if the interrupt of the USB controller
reached the system after sending.
Generally i would not assume that there's a problem in the PF_CAN netlayer in
this special case.
Regards,
Oliver
next prev parent reply other threads:[~2012-02-03 16:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4F29091F.4010908@in.tum.de>
[not found] ` <4F2AA5DF.9080304@grandegger.com>
2012-02-03 16:08 ` [Socketcan-users] Message stalls in SocketCan Layer? Michael Jäntsch
2012-02-03 16:57 ` Oliver Hartkopp [this message]
2012-02-03 19:41 ` Wolfgang Grandegger
2012-02-13 10:00 ` Michael Jäntsch
2012-02-13 10:45 ` Wolfgang Grandegger
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