Re: [PATCH] ALSA and IrDA workaround for Dell Inspiron

[Jaroslav Kysela]

On Thu, 14 Mar 2002, [iso-8859-15] Jörg Prante wrote:

> 
> Here is a patch to solve an IrDA lockup when ALSA OSS is used with IrDA on 
> Dell Inspiron 8100. Maybe some other laptops are concerned, too. Please test 
> if other machines can use this patch.
> 
> The ALSA OSS initialization code performs a hard reset on the IrDA port of a 
> Dell Inspiron. No more data can be sent or received via the infrared port 
> until a cold restart of the system (power down). The lockup will always 
> happen when ALSA is started after IrDA which is normally the case. 
> 
> I found the ALSA OSS AC97 modem probe is the reason. This patch enables a 
> workaround by a kernel option CONFIG_SOUND_NO_MODEM_PROBE which 
> disables the modem probe if the option is enabled.
> 
> The patch will be included in my upcoming kernel patch set -jp8.
> 
> Please reply with CC since I am not subscribed to the Linux kernel mailing 
> list.

A small note: The directory linux/sound/oss contains only OSS sources
moved from linux/drivers/sound. They are not related with ALSA in any way.
ALSA AC97 codec routines don't touch modem registers at all.

						Jaroslav

-----
Jaroslav Kysela <[e-mail]>
Linux Kernel Sound Maintainer
ALSA Project  http://www.alsa-project.org
SuSE Linux    http://www.suse.com