From owner-freebsd-stable  Sun Sep  3 16:32: 3 2000
Delivered-To: freebsd-stable@freebsd.org
Received: from db.wireless.net (adsl-gte-la-216-86-194-70.mminternet.com [216.86.194.70])
	by hub.freebsd.org (Postfix) with ESMTP id DA32C37B423
	for <freebsd-stable@FreeBSD.ORG>; Sun,  3 Sep 2000 16:32:00 -0700 (PDT)
Received: from db.wireless.net (dbm.wireless.net [192.168.0.2])
	by db.wireless.net (8.9.3/8.9.3) with ESMTP id QAA67668;
	Sun, 3 Sep 2000 16:19:03 -0700 (PDT)
	(envelope-from dbutter@db.wireless.net)
Message-ID: <39B2DF59.FA36BC24@db.wireless.net>
Date: Sun, 03 Sep 2000 16:31:37 -0700
From: Devin Butterfield <dbutter@db.wireless.net>
X-Mailer: Mozilla 4.73 [en] (X11; I; Linux 2.2.12 i386)
X-Accept-Language: en
MIME-Version: 1.0
To: "Jacques A. Vidrine" <n@nectar.com>
Cc: kmays <kmays@email.msn.com>, freebsd-stable@FreeBSD.ORG
Subject: Re: FreeBSD v4.1R on laptops
References: <IEEPJFFADOAICFCCGJOHKEDICAAA.dwforbes@home.com> <019c01c014fe$4279c860$8a42163f@KenMays> <39B19161.F6939E33@db.wireless.net> <20000903094518.A2627@hamlet.nectar.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-stable@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

"Jacques A. Vidrine" wrote:
> 
> On Sat, Sep 02, 2000 at 04:46:41PM -0700, Devin Butterfield wrote:
> > I have 4.1-STABLE running fine on my Sony Z505SX. X works fine at
> > 1024x768, and sound works with only a small hack. APM also works great.
> 
> What's the hack?
> 
> (I also run 4.1-STABLE on Sony Z505SX: sound ``just works'')

Hmmm...perhaps there was a fix recently (I have not made world for
several weeks). Nevertheless the fix/hack was to uncomment
chn_dmaupdate() from /sys/dev/sound/pcm/channel.c. Here is a snip from
the original un-modded code:

[...] at line 231
		b->rp = chn_getptr(c);
		b->fp = (b->rp + b->bufsize / 4) % b->bufsize;
		b->rl = b->bufsize / 4;
		b->fl = b->bufsize - b->rl;
	  	b->underflow = 0;
	} else {
		/* chn_dmaupdate(c); */
	}
}

With this line commented (as I and a number of other people reported in
a thread on this list) attempting to play a sound file would cause the
channel to lock up saying something like "pcm0: play interrupt timeout"
and then only a reboot would unlock it.
--
Regards, Devin.


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message