The alsa ymfpci drivers haven't worked on toshiba tecra 8100's since 0.5. But the OSS drivers derived from the 0.5 alsa drivers work fine. This is a non-deterministic problem in 1.0.0.rc2.
I've found that I can switch the ymfpci on or off by repeatedly starting/aplaying/stopping the alsa sound system. About one time in 3, 4, 5, or more, the sound chip will work, all the other times I get static out of the speakers.
Specifically, all I'm doing is looping over:
/etc/init.d/alsasound start aplay /usr/share/sounds/startup3.wav /etc/init.d/alsasound stop
and most times through the loop I hear static, but sometimes I hear startup3.wav played instead.
/sbin/lspci -vvxxs <ymfpci bus address> produces identical output in all cases: alsa producing sound, alsa producing static, or old oss driver producing sound, the lspci run in each case after the aplay/play was finished.
I have the current Planet CCRMA kernel-2.4.23.ll, alsa drivers (1.0.0.rc2), and source installed. I can run any with/without comparisons that might be useful, or compile patches, or whatever.
(This kernel, by the way, only boots with the options pci=noacpi or acpi=off, otherwise the boot hangs when initializing the pcmcia slots. This goes for 2.6.0 and any other acpi enabled kernel that I've tried on the tecra 8100.)
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