Hi, Takashi.
> Well, the codec is usually recognized, but it
> doesn't mean that your
> hardware is really supported. Check out the kernel
> log and see
> whether the driver tells about "unknown model...".
> Also try to build
> drivers with --with-debug=detect option for making
> it more verbose.
I tried this option, but I couldn't find such messages (or
any messages) in /var/log/messages.
> > kernel: hda-intel: Invalid position buffer,
> using LPIB
> > read method instead.
>
> Does it appear after arecord or even after aplay?
No, it only appeared at the start of arecord.
> I recommend you to try various model options for
> ALC262. There are
> plenty of varients, but not specific for Toshiba, so
> far. But it's
> still worth to try.
I also tried all model options in ALSA-configuration.txt,
but it was the same result.
But, I noticed three facts:
a) This problem occurs when applications are started.
But, after restart ALSA, it doesn't occur
when I start the "same" application again.
(When I start another application, it occurs...)
b) When I run "arecord" after some applications are
started,
this problem doesn't occur.
(When I started "new" application while I'm running
"arecord", it occurs.)
c) On CD-boot linux, such as KNOPPIX,
this problem doesn't occur at all.
I doubted that this is a problem around memory.
So, to make sure that, I have tried to clean a page cache
after this problem occured as follows:
(1) run "arecord"
(2) start wireshark(ethereal) => arecord stopped
(3) restart ALSA
(4) run "arecord" again => OK
(5) start wireshark => arecord is still running
(6) stop wireshark
(7) clean a page cache as follows:
# systcl -w vm.drop_caches=3
=> arecord is still running
(8) start wireshark again => arecord stopped!
Does this information help to resolve this problem?
Best regards.
===
Shingo
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