[ltp] mp3's on 770z

[linux-thinkpad@www.bm-soft.com]

>> I have read somewhere that unloading the sound modules and installing them
>> again at a later time during boot will do the trick. At least that's how I
got
>> my sound running flawlessly.
>
> Same experience here. I have this is in /etc/rc.d/rc.local:
>
> echo "Crystal Sound Hack"
> /sbin/rmmod cs4232
> /sbin/modprobe cs4232
>
> If it stops working during a session, I just run '/etc/rc.d/rc.local'
> again.

After publishing the 600E HOWTO on the IBM HelpCenter site, I received a tip
indicating that the probing done by PCMCIA causes problems with the Crystal
chip, and that the stopping/restarting technique works so long as it is run
after PCMCIA initialization. After my initial verification of this, it does seem
to be correct, and that removing various I/O "include" lines from config.opts
eliminates the problem, making the stopping/restarting technique unnecessary.

I'll update the 600E HOWTO once I've checked with our hardware folks to see what
ranges should ideally be included/excluded. As a start, eliminate the "include
port 0x100-0x4FF".

-- Keith

Keith Frechette
Linux Development Lead, Mobile Computing Options and Software Development
IBM Research Triangle Park, North Carolina
kfrechet@us.ibm.com / 919-543-3761 / TieLine:441-3761