kern/55395:ICH sampling rate changes after resume from suspend
oberman at es.net
Tue Sep 2 15:41:13 PDT 2003
The following reply was made to PR kern/55395; it has been noted by GNATS.
From: "Kevin Oberman" <oberman at es.net>
To: Orion Hodson <orion at freebsd.org>
Cc: freebsd-gnats-submit at freebsd.org
Subject: Re: kern/55395:ICH sampling rate changes after resume from suspend
Date: Tue, 02 Sep 2003 15:33:01 -0700
> From: Orion Hodson <orion at freebsd.org>
> Date: Mon, 01 Sep 2003 21:58:06 -0700
> Sender: hodson at icir.org
> This is a multipart MIME message.
> Content-Type: text/plain; charset=us-ascii
> /-- "Kevin Oberman" wrote:
> | A bit more information:
> | Modifying hw.snd.ac97rate makes not difference at all. I measured the
> | speed-up as about 10% or the equivalent of 52.3 KHz.
> Ah, okay, it's coming back up and using the wrong clock source. We've had a
> general issue with this on the ICH. This is probably a function of how the
> existing ich code effects resets, though don't have an ich box that manifests
> the problem to verify this first hand. Can you try the attached patch and see
> if it improves the situation?
Thanks for the patch, but it results in a kernel that fails during the
device probe. It fires off multiple panics and I can't seem to get
anything useful to work at the db> prompt, just another panic.
Let me know if you would like the detials of the panic and I'll
transcribe them for you.
The patch was to a freshly cvsuped sources as of about 14:30 PDT (-7)
today. I'm still running installworld after backing out the
patch. I'll build another kernel with the patch for debugging once I
feel that the CURRENT is otherwise "stable".
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net Phone: +1 510 486-8634
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