From: Takashi Iwai <tiwai@suse.de>
To: "Éric Piel" <eric.piel@tremplin-utc.net>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
alsa-devel@alsa-project.org, perex@perex.cz,
"Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [2.6.33-rc1] [SOUND] HDA: high cpu usage, noise
Date: Tue, 22 Dec 2009 16:40:37 +0100 [thread overview]
Message-ID: <s5htyvjggp6.wl%tiwai@suse.de> (raw)
In-Reply-To: <4B30E2AD.8010709@tremplin-utc.net>
At Tue, 22 Dec 2009 16:15:57 +0100,
Éric Piel wrote:
>
> Op 22-12-09 10:17, Takashi Iwai schreef:
> :
> >>> It shouldn't. The polling mode doesn't give any behavioral change,
> >>> and the CPU usage can't be that high.
> >>>
> >>> Try is to pass bdl_pos_adj=0 option. This should reduce the CPU hog,
> >>> at least. But it doesn't mean it's the right fix...
> >> I'll try
> Just tried: it doesn't have any effect, as enable_msi=0. Still 25% of
> the CPU used, as before.
> $ cat bdl_pos_adj
> 0,-1,-1,-1,-1,-1,-1,-1
>
> Could it be coming from the beeper? Also, just in case it can help,
> attached is my .config .
Do you have multiple HD-audio devices? See /proc/asound/cards.
If there are multiple, you need to pass a value for each.
Takashi
next prev parent reply other threads:[~2009-12-22 15:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-20 17:27 Maciej Rutecki
2009-12-21 10:28 ` Takashi Iwai
2009-12-21 18:12 ` Maciej Rutecki
2009-12-21 19:08 ` Éric Piel
2009-12-22 7:04 ` Takashi Iwai
2009-12-22 9:15 ` Éric Piel
2009-12-22 9:17 ` Takashi Iwai
2009-12-22 15:15 ` Éric Piel
2009-12-22 15:40 ` Takashi Iwai [this message]
2009-12-22 15:42 ` Éric Piel
2009-12-23 14:27 ` Éric Piel
2009-12-23 15:02 ` Takashi Iwai
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