Bug#366680: linux-image: snd_intel8x0 module randomly fails to initialize sound hardware
Benjamin A. Okopnik wrote:
Since I didn't get copied on this reply (I just saw it after searching
the BTS), I didn't get a chance to follow up to it earlier. I'd
appreciate being CCd in the future, thanks.
Sorry, was my mistake.
This machine initially came with Wind0ws, and I used it that way for a
two-week long road trip, until I could get to a high-speed connection.
The sound worked fine during that time.
Ok, as i supposed.
And, do the problem comes indifferently (and with similar probability)
after a reboot or a complete poweroff?
At this point, rebooting or cold-booting produces a problem about 80% of
the time. The only "cure" (works ~99% of the time) is to remove the
battery and disconnect the adapter from the machine for a few seconds.
To me this is a very strange thing. Seems that Linux kernel touch
something in a bad way in your audio hardware. And here, as you say
after, ACPI seems to be the most probable guilty.
In your internet research, have you found someone else with Acer 2012,
that expose the same problem? In my brief research on
"www.linux-on-laptops.com" nobody has reported problems with audio.
Have you tryed with some linux live CD (Ubuntu, Knoppix) to see if
something behaves differently? But i suspect it is not a
kernel/distibution problem...
If you believe that this would give you usable data, I'll be happy to
download a few of these and try them out. Since I have a relatively slow
connection, I'll have to get to a fast one somewhere which is a bit of a
hassle, so I'm a bit reluctant to just do so without an explicit
request.
I think it is a good test to see if other linux systems are able to make
it work, without touching your system. At least, if you succeeded, you
can restrict the problem to configuration or kernel patch, that is you
can exclude hardware problem. And (in many country) you can find live
CDs attached to many computer science magazines.
What little I
have found in this regard pointed in the general direction of ACPI
problems; I got an ACPI data compiler, fixed the errors in the ACPI
data, and recompiled it, but this does not appear to have helped.
I could agree with you... The only strange thing is that people with
Acer 2012 i have found, reports that audio work out of the box, without
appending kernel parameters, alsa parameters, applying patch, ecc. And
their audio device, as reported by lspci, seems identical to your.
I would think that you have a defective hardware but you say that it
works under Windows...
Just to see if something happen, you can try to tweak the kernel command
line with options related to ACPI, APIC and IRQ routing.
For example:
acpi=off
acpi=noirq
nolapic
pci=biosirq
pci=noacpi
pci=routeirq
Sorry, i haven't other ideas.
I wish you'll find a solution to your problem.
Cesare.
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