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List: linux-thinkpad
Subject: Re: [ltp] T21 FC2 Alsa & ACPI problems
From: "Piotr Gawrysiak" <pgawrysiak () supermedia ! pl>
Date: 2004-05-22 15:53:17
Message-ID: 007501c44014$e7011d30$bb34f817 () thinkpad
[Download RAW message or body]
OK, at least I figured out the audio problem - T21 does not have any synthesizer \
built in :-) In WinXP all MIDI is played by software synthesizer provided by \
Microsoft (with Roland sound fonts). For linux I guess I can get similar \
functionality with Timidity, it should be possible to create a "virtual" ALSA synth \
device with it (if anyone tried it - pls. let me know)...
Piotr
----- Original Message -----
From: Piotr Gawrysiak
To: linux-thinkpad@linux-thinkpad.org
Sent: Saturday, May 22, 2004 4:00 PM
Subject: [ltp] T21 FC2 Alsa & ACPI problems
Sorry for multiple postings (if any ;-)
I decided to give final Fedora Core 2 a try on this notebook (T21 2647-4AU) - up to \
now it has been running Win XP only, as I had already Linux on my TP600 and did not \
have time to reinstall, until now :-)
Fedora installation went more or less OK, despite complaining about partition \
table, but GRUB configuration seems to be correct and I dual boot. As usually a lot \
of small things remain and I am currently fighting with power management and sound.
I tried using both APM and ACPI with mixed results. With APM (machine has latest \
BIOS installed) I can *almost* suspend but various strange things happen - for \
example after Fn-F4 screen goes blank, but fan stays on and computer refuses to \
complete the cycle. ACPI seems to be better. Fedora did not have acpi/events \
configured, but at least the sleep button (Fn-F4) and lid are recognized (but no \
Fn-F3 and Fn-F12 - is it possible to make them usable?), and echo 3 > \
/proc/acpi/sleep puts the machine correctly to standby, so I added apropriate script \
and can now use Fn-F4. With ACPI this machine has however one very annoying problem - \
when the CPU is put into C3 power mode (when computer is more or less idle for a \
while, as seen in /proc/acpi/processor/CPU/power ) the speakers start emiting strange \
high pitched sound. In Win XP it is also happening, but apparently Windows uses this \
state only when the machine is on battery power, while in linux it happens also when \
mains powered. Now - with cat /proc/acpi/processor/CPU/power I can read the current \
power state, but is it possible to set it? (or - even better - to restrict CPU power \
management only to C0, C1, C2, or switch this functionality completely off?). The \
power consumption does not really matter when I am not using battery, and this sound \
is simply driving me nuts :-)
Another thing - sound configuration. The ALSA drivers supplied with Fedora work \
fine (snd-cs46xx module) but I do not have any synth capability (for playing MIDI \
files for example). After reading ALSA pages I am not sure (:-) if this card has a \
hardware synthetiser built in, and if ALSA driver supports it (but - in WinXP it \
seemed to be working, but it might have been using some kind of software synthetiser) \
so any information would helpful. Just in case I dowloaded and compiled newest stable \
ALSA drivers, but these seem to behave the same way. In KDE Info Center I see remark \
about 'not enabling in configure' next to Synth device. What could it mean?
Many thanks in advance for suggestions & hints.
Piotr Gawrysiak
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<DIV><FONT face=Arial size=2>OK, at least I figured out the audio problem - T21
does not have any synthesizer built in :-) In WinXP all MIDI is played by
software synthesizer provided by Microsoft (with Roland sound fonts). For linux
I guess I can get similar functionality with Timidity, it should be possible to
create a "virtual" ALSA synth device with it (if anyone tried it - pls. let me
know)...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Piotr</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 \
2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message \
----- </DIV> <DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=pgawrysiak@supermedia.pl href="mailto:pgawrysiak@supermedia.pl">Piotr
Gawrysiak</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=linux-thinkpad@linux-thinkpad.org
href="mailto:linux-thinkpad@linux-thinkpad.org">linux-thinkpad@linux-thinkpad.org</A> \
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, May 22, 2004 4:00
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [ltp] T21 FC2 Alsa & ACPI
problems</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT><BR></DIV>
<DIV><FONT face=Arial size=2>Sorry for multiple postings (if any
;-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I decided to give final Fedora Core 2 a try on
this notebook (T21 2647-4AU) - up to now it has been running Win XP only, as I
had already Linux on my TP600 and did not have time to reinstall, until now
:-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Fedora installation went more or less OK, despite
complaining about partition table, but GRUB configuration seems to be correct
and I dual boot. As usually a lot of small things remain and I am currently
fighting with power management and sound.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I tried using both APM and ACPI with mixed
results. With APM (machine has latest BIOS installed) I can *almost* suspend
but various strange things happen - for example after Fn-F4 screen goes blank,
but fan stays on and computer refuses to complete the cycle. <BR>ACPI seems to
be better. Fedora did not have acpi/events configured, but at least the sleep
button (Fn-F4) and lid are recognized (but no Fn-F3 and Fn-F12 - is it
possible to make them usable?), and echo 3 > /proc/acpi/sleep puts the
machine correctly to standby, so I added apropriate script and can now use
Fn-F4. With ACPI this machine has however one very annoying problem - when the
CPU is put into C3 power mode (when computer is more or less idle for a while,
as seen in /proc/acpi/processor/CPU/power ) the speakers start emiting strange
high pitched sound. In Win XP it is also happening, but apparently Windows
uses this state only when the machine is on battery power, while in linux it
happens also when mains powered. Now - with cat /proc/acpi/processor/CPU/power
I can read the current power state, but is it possible to set it? (or - even
better - to restrict CPU power management only to C0, C1, C2, or switch this
functionality completely off?). The power consumption does not really matter
when I am not using battery, and this sound is simply driving me nuts
:-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Another thing - sound configuration. The ALSA
drivers supplied with Fedora work fine (snd-cs46xx module) but I do not have
any synth capability (for playing MIDI files for example). After reading ALSA
pages I am not sure (:-) if this card has a hardware synthetiser built in, and
if ALSA driver supports it (but - in WinXP it seemed to be working, but it
might have been using some kind of software synthetiser) so any information
would helpful. Just in case I dowloaded and compiled newest stable ALSA
drivers, but these seem to behave the same way. In KDE Info Center I see
remark about 'not enabling in configure' next to Synth device. What could it
mean? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Many thanks in advance for suggestions &
hints. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Piotr Gawrysiak</FONT><FONT face=Arial
size=2> <BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>
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