Messages in this thread |  | | From | Peter Sandstrom <> | Subject | RE: sound slowdown when accessing ide cdrom | Date | Sat, 29 Sep 2001 00:30:52 +0200 |
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I've been getting this in both win2k and linux using several different cdrom drives on an abit kt7a-raid (via kt133a) and a soundblaster awe64 isa card. Looks like the kt133 puts ide performance over isa? I didn't have this feature on my abit bp6 (intel 440bx).
/Peter
-----Original Message----- From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Christian Ohm Sent: den 28 september 2001 00:07 To: linux-kernel@vger.kernel.org Subject: sound slowdown when accessing ide cdrom
hi.
i'm using an old ide cdrom drive and a soundblaster awe64 isa pnp sound card (using the alsa-driver). when i'm accessing the cdrom, the sound playback slows down. a little and irregularly when copying files, more and almost constant (about 10%) when grabbing audio using cdparanoia. it works perfect when using the scsi cdrom drive.
i'm using an nmc 8tax+ (via kt133) mainboard with duron700 and 512mb ram, one isa slot with the soundblaster awe64 pnp, a dawicontrol dc2975u scsi controller (symbios logic 53c875), a matrox g400, a sis900 ethernet controller. the ide cdrom drive is an old 4x speed drive (/proc/ide/ide1/hdc/model says 'MATSHITA CR-581') connected to the second ide port (without slave). i'm using kernel 2.4.9 and the oss emulation of alsa (debian unstable packages 0.9+0beta7-1). i also tested this with the low latency patch (which didn't change anything).
anyone knows what happens there? it seems like there's some strange interaction of the ide cdrom driver and a timer used by (at least) alsa.
if there's some info missing i'd be happy to provide it.
bye christian ohm
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