[ltp] 600E: serial + IR + sound + PC-modem = IRQ shortage

[Thomas Hood]

Till.Straumann@tu-berlin.de wrote:
> On 18-May-00 linux-thinkpad@merctech.com wrote:
> >       Alsa sound (for fun)
> 
>  - I use the sound driver distributed with the standard 2.2.14
>    kernel which works fine but doesnt survive APM suspend/resume.
>    Note that Alsa is said to have the same problem. However, I
>    created a patch for the standard kernel driver (not Alsa)
>    which fixes this (and other things). It can be found at
>       http://www-hft.ee.TU-Berlin.DE/~strauman
> 
>    dont forget to exclude the sound (and midi, if enabled)
>    IRQ and port address in /etc/pcmcia/config.opts.
> 
> > Sound works.
> 
>   Does Alsa now support APM (suspend/resume)? I tried an older
>   version...

ALSA doesnot yet handle the suspend-&-resume problem.  However,
1) this is on the developers' TODO list (at low priority);
2) based on Till Straumann's work, I have written most of
the code for the ALSA driver to restore the sound registers
after a suspend and resume.  Unfortunately I haven't yet 
worked the bugs out of it.

Thomas
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