Re: continuous system speaker from booting on

Ray Parrish wrote:
Tobias Verbeke wrote:
Jason Crain wrote:
Tobias Verbeke wrote:

I'm running Jaunty alpha (up to date)
on a Compal JHL90 laptop and since
some days I live with the system
speaker producing one continuous beep
from boot time till I shut down.

Can I provide logs for someone to shed
light on this strange phenomenon ?


Does it also do that outside of Ubuntu, like while running memtest86?

No, it doesn't do this while running memtest86.

One error message I was able to read during boot was
something along

Unable to open /etc/udev/rules.d

Ok, I forwarded your problem to my electronics technician Uncle, and
here is his reply to my query about your problem.

The problem sounds like it could be hardware - and in a laptop, that can
be hard to fix. I don't know if he is sure the tone is coming from the
sound system speakers or the beeper on the mainboard - but I also am not
sure laptops use a beeper anymore since the sound system is integrated
on the mainboard and could provide the beep code warnings (from post
errors) through that system. The continuous tone beep code on most
system BIOS' means a power supply problem - no warnings at all usually
signifies a dead CPU/mainboard problem. Errors that serious do not
allow even a display, thus the beep codes.

If the usual volume control display is available with the Compaq
laptop/Linux combo, he could bring that up and try muting or reducing
the volume of each sound source individually. If the source is just one
input, troubleshoot that input (synthesizer or MIDI source problems
could be software), Mike or Line inputs might mean something is
connected that is receiving crosstalk from the sound system output - not
likely since the tone frequency or volume would change with any movement
that affected the input cables or devices. If no individual input
reduces or quiets the tone, then the master volume and mute buttons will
probably not help either, indicating a problem in the sound chip (a
surface mount component on the mainboard). Open filter capacitors
around the sound chip could allow a low frequency sound due to feedback
via the power supply busses (called motorboating) and might be obvious
from the swelled appearance of the capacitors.

I hope his answer can shed some light on the problem.

Thanks Ray (and electronics technician Uncle) for this extensive reply.
I'll post back whenever I discover anything new / relevant.

Best,
Tobias

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