Le Fri, 12 Jan 2007 10:35:05 +1100, Geoff Beasley <[EMAIL PROTECTED]> a écrit :
> anyone know what problems or benefits disabling acpi has ? any side-effects > for apic or xt-pic? any differences with 32 bit v 64 bit ? > > For what I know, it must do a difference only when running a realtime kernel and if you have shared IRQ or want to use the IRQ 9 for the sound card (or another hardware). acpi usually is on IRQ 9, and IRQ 9 is a very good IRQ for a sound card (it have a high hardware priority). With a kernel without realtime preemption, you will see no difference and it must work with shared IRQ without problem. But realtime kernel are very sensitive with shared IRQ. The problem is at 2 different hardwares will get the same priority, and if one of those hardware is the sound card (or a hardware with a high priority), it will generally hang the system. To disable acpi can be a simple way (sometime the only one) in order to free an IRQ. I read something about apic and xt-pic, but I have lost the reference. apic is more advanced but is not a fully new hardware design. That is a new design, but over the xt-pic. That implies at apic have more hardware overrun as xt-pic. I don't know if the difference will or can play a roll with a realtime kernel. Be aware at a laptop without acpi will just not work in most if not all cases, but a desktop must just be fine with xt-pic or acpi. Ciao, Dominique ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
