Re: Issues with HP DV4 laptop sound after Ubuntu Jaunty 9.04 upgrade

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At Mon, 04 May 2009 10:26:27 -0500,
Guy Stalnaker wrote:
> 
> Hello again, Takashi,
> 
> Can you think of why a new distribution might be the cause, or a change
> that a new distribution makes, that would result in such behavior?  The
> new distribution includes a new kernel and a new version of xorg (I
> think), so everything on top of the hardware is new. What's damned
> peculiar is that the HTML output interface is always recognized
> successfully. It's only the Audio device: ATI Technologies Inc SBx00
> Azalia (Intel HDA) on pci 00:14.2 that seems to have this issue.
> 
> To add oddity to the issue, I brought the laptop to work this morning
> and on boot the Audio device was successfully recognized and aplay -l
> shows it a card 0!!
> 
> I wonder ... do you think that it's possible that a keyboard, mouse,
> printer, or some other USB device plugged into the laptop at boot could
> affect something like this?  That's really the only difference between
> work and home.

I guess it's an issue with ACPI or core PCI layer.  Or suspend, if
this happens only after suspend/resume and not after a fresh boot.

In any way, I recommend you to report this on kernel bugzilla.


Takashi
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