At Wed, 09 Aug 2006 11:57:06 +0200,
I wrote:
>
> At Wed, 9 Aug 2006 09:05:33 +0930 (CST),
> Jonathan Woithe wrote:
> >
> > Hi Takashi
> >
> > > > "Lubomir" posted via the bugtracker:
> > > > > I own an Acer c204 and am the only one person who use linux on it. I can
> > > > > not get sound out of my headphone or the normal speaker. ...
> > :
> > > > It sounds like this particular Acer laptop needs more than the basic
> > > > ALC260 model. ...
> > >
> > > It seems that his laptop has a problem with with communication to
> > > HD-audio codec, too, according to his recent post to alsa-devel ML:
> > >
> > > > To: alsa-devel@xxxxxxxxxxxxxxxxxxxxx
> > > > Subject: No chance to get the soundcard working
> > > > From: 017623780966@xxxxxxxxxxx
> > > >
> > > > Hello, i have a big problem with my soundcard. It have a Realtek alc260
> > > > chip (intel-hda) and its build in an Acer c204tmi notebook. I can not get
> > > > that card working with linux. I tried over 20 linux live cds and have installed
> > > > now gentoo linux on it. The problem i have is: the sound card is been found
> > > > by alsaconf and can be configured. Alsamixer also found the card and can
> > > > configure it. I have unmuted every channel and set it up to max. I have
> > > > always tired the headphone. I never could get sound of that notebook. In
> > > > dmesg i found that -> ALSA /var/tmp/portage/alsa-driver-1.0.12_rc1-r1/work/alsa-
> > > > driver-1.0.12rc1/pci/hda/..
> > > > /../alsa-kernel/pci/hda/hdaintel.c:525: hda_intel: azx_get_response timeout,
> > > > switching to single_cmd mode...
> > > > i do not know is that the reason why i have no sound. I have testet the
> > > > sound with xmms,KsCD,Noatun, and other. xmms and noatun do not start playing
> > > > and KsCD start playing, but i can not hear anything.
> > > > I also cant ask someone who got alsa running, because i am the only person
> > > > who use that notebook under linux.
> > > > I do not know what i could do. Can you help me?
> >
> > Interesting. For what it's worth, I also see the azx_get_response timeout
> > message every so often on my ALC260-equipped laptop, but its presence
> > doesn't appear to prevent the sound system from working. The last kernel I
> > definitely saw the message was one of the 2.6.16-rt kernels. I recently put
> > 2.6.17-rt8 on there but haven't checked for the message lately.
>
> This should be independent from the kernel version.
> It's an error that the controller couldn't get a response for the
> requested verb from the codec chip. Usually something wrong in the
> interrupt, and RIRB counter wasn't checked.
>
> Well, now another idea came to my mind. We can implement a polling
> mode for such a case. I'll create a test patch later.
OK the patch is below.
Any testers who have the azx_get_response timeout problem?
Takashi
diff -r 5b67bba2d36f pci/hda/hda_intel.c
--- a/pci/hda/hda_intel.c Tue Aug 08 21:13:42 2006 +0200
+++ b/pci/hda/hda_intel.c Wed Aug 09 12:07:44 2006 +0200
@@ -332,6 +332,7 @@ struct azx {
int position_fix;
unsigned int initialized: 1;
unsigned int single_cmd: 1;
+ unsigned int polling_mode: 1;
};
/* driver types */
@@ -518,8 +519,23 @@ static unsigned int azx_rirb_get_respons
struct azx *chip = codec->bus->private_data;
int timeout = 50;
- while (chip->rirb.cmds) {
+ for (;;) {
+ if (chip->polling_mode) {
+ spin_lock_irq(&chip->reg_lock);
+ azx_update_rirb(chip);
+ spin_unlock_irq(&chip->reg_lock);
+ }
+ if (! chip->rirb.cmds)
+ break;
if (! --timeout) {
+ if (! chip->polling_mode) {
+ snd_printk(KERN_WARNING "hda_intel: "
+ "azx_get_response timeout, "
+ "switching to polling mode...\n");
+ chip->polling_mode = 1;
+ timeout = 50;
+ continue;
+ }
snd_printk(KERN_ERR
"hda_intel: azx_get_response timeout, "
"switching to single_cmd mode...\n");
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