From: "P. Christeas" <p_christ@hol.gr>
To: Takashi Iwai <tiwai@suse.de>
Cc: lkml <linux-kernel@vger.kernel.org>, alsa-devel@lists.sourceforge.net
Subject: Re: [Alsa-devel] Reproducible deadlock w. alsa/maestro3 when sleeping (ACPI,) 2.6.0-test1
Date: Wed, 16 Jul 2003 17:18:50 +0300 [thread overview]
Message-ID: <200307161718.50464.p_christ@hol.gr> (raw)
In-Reply-To: <s5h7k6i1yoa.wl@alsa2.suse.de>
Takashi Iwai wrote:
> At Mon, 14 Jul 2003 19:17:22 +0300,
>
> P. Christeas <p_christ@hol.gr> wrote:
> > I have been experiencing some fully reproducible deadlock when waking
> > from sleep, using artsd over ALSA.
> > The scenario is:
> > I use ALSA, with the maestro3 device and everything else compiled as
> > modules. From userspace, I launch artsd, which uses its native ALSA
> > support to connect to /dev/pcmXXXXX .
> > I only have a custom script, which sleeps the machine by a 'echo 1>
> > /proc/acpi/sleep' . It does NOT stop alsa .
>
> could you check whether m3_suspend() and m3_resume() in
> sound/pci/maestro3.c are really called?
>
>
> Takashi
OK, I did that. I put two messages in both functions of the maestro3 driver.
I suspended/resumed the machine. Both functions had been called.
This time, I did NOT have 'artsd' (i.e. the client) loaded. What happened was
that the module was properly restored and I could load (and use) artsd even
after the resume.
That brings me to the first assumption/question I have made: is there
something wrong if we suspend two parts (one module and a userspace process),
while they inter-communicate through the /dev/* interface?
static void m3_suspend(m3_t *chip)
{
snd_card_t *card = chip->card;
int i, index;
snd_printk("m3 suspend");
if (chip->suspend_mem == NULL)
return;
if (card->power_state == SNDRV_CTL_POWER_D3hot)
return;
...
static void m3_resume(m3_t *chip)
{
snd_card_t *card = chip->card;
int i, index;
snd_printk("m3 resume");
if (chip->suspend_mem == NULL)
return;
...
next prev parent reply other threads:[~2003-07-16 14:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-14 16:17 Reproducible deadlock w. alsa/maestro3 when sleeping (ACPI,) 2.6.0-test1 P. Christeas
2003-07-16 11:47 ` [Alsa-devel] " Takashi Iwai
2003-07-16 14:18 ` P. Christeas [this message]
2003-07-16 15:03 ` P. Christeas
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