kern/55395:ICH sampling rate changes after resume from suspend

Kevin Oberman oberman at
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>
To: Orion Hodson <orion at>
Cc: freebsd-gnats-submit at
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>
 > Date: Mon, 01 Sep 2003 21:58:06 -0700
 > Sender: hodson at
 > This is a multipart MIME message.
 > --==_Exmh_-18846300150
 > 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".
 Thanks again!
 R. Kevin Oberman, Network Engineer
 Energy Sciences Network (ESnet)
 Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
 E-mail: oberman at			Phone: +1 510 486-8634

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