From: Dave Jones <davej@redhat.com>
To: "S.Çağlar Onur" <caglar@pardus.org.tr>
Cc: tiwai@suse.de, cpufreq@lists.linux.org.uk, linux-kernel@vger.kernel.org
Subject: Re: [BUG] Interesting race between cpufreq_ondemand and snd_atiixp
Date: Fri, 15 Jun 2007 20:54:28 -0400 [thread overview]
Message-ID: <20070616005428.GG23417@redhat.com> (raw)
In-Reply-To: <200706160233.47659.caglar@pardus.org.tr>
On Sat, Jun 16, 2007 at 02:33:41AM +0300, S.Çağlar Onur wrote:
> One of our colleagues found following problem with his old laptop while
> testing Linus's latest git with external alsa-driver (v1.0.14). And we can
> also reproduce same problem with 2.6.18.8 so it seems not a new regression
> (if it is a regression).
>
> As a summary "sound stops to work if cpufreq_ondemand governor is used" on
> that laptop. Problem occurs only if cpufreq_* modules are loaded and %100
> reproducable if system configured for ondemand governor.
I'm puzzled. The cpuinfo shows that this cpu doesn't have speedstep, so
why acpi-cpufreq successfully loads is a mystery.
What's in/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies ?
Maybe the acpi implementation is faking multiple speeds using throttling
a la p4-clockmod, which would be a bit loopy, but possible I guess.
Dave
--
http://www.codemonkey.org.uk
WARNING: multiple messages have this Message-ID (diff)
From: Dave Jones <davej@redhat.com>
To: "S.Çağlar Onur" <caglar@pardus.org.tr>
Cc: linux-kernel@vger.kernel.org, cpufreq@lists.linux.org.uk, tiwai@suse.de
Subject: Re: [BUG] Interesting race between cpufreq_ondemand and snd_atiixp
Date: Fri, 15 Jun 2007 20:54:28 -0400 [thread overview]
Message-ID: <20070616005428.GG23417@redhat.com> (raw)
In-Reply-To: <200706160233.47659.caglar@pardus.org.tr>
On Sat, Jun 16, 2007 at 02:33:41AM +0300, S.Çağlar Onur wrote:
> One of our colleagues found following problem with his old laptop while
> testing Linus's latest git with external alsa-driver (v1.0.14). And we can
> also reproduce same problem with 2.6.18.8 so it seems not a new regression
> (if it is a regression).
>
> As a summary "sound stops to work if cpufreq_ondemand governor is used" on
> that laptop. Problem occurs only if cpufreq_* modules are loaded and %100
> reproducable if system configured for ondemand governor.
I'm puzzled. The cpuinfo shows that this cpu doesn't have speedstep, so
why acpi-cpufreq successfully loads is a mystery.
What's in/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies ?
Maybe the acpi implementation is faking multiple speeds using throttling
a la p4-clockmod, which would be a bit loopy, but possible I guess.
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2007-06-16 0:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-15 23:33 [BUG] Interesting race between cpufreq_ondemand and snd_atiixp S.Çağlar Onur
2007-06-15 23:36 ` S.Çağlar Onur
2007-06-16 0:54 ` Dave Jones [this message]
2007-06-16 0:54 ` Dave Jones
2007-06-16 11:44 ` S.Çağlar Onur
2007-06-16 11:44 ` S.Çağlar Onur
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070616005428.GG23417@redhat.com \
--to=davej@redhat.com \
--cc=caglar@pardus.org.tr \
--cc=cpufreq@lists.linux.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=tiwai@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.