i've been searching for my "irq 7: noone cared" and "irq 7 disabled" bug quite a while until i found some post, where i found a patch against an old 2.5.X kernel. the patch never found it's way into the 2.6.X tree, but i decided to give it a shot and never had any problems any longer. so it might be time to incoporate that small change into the 2.6.X tree. i'm no kernel hacker and do not know how to write patches, so i'll make it plain here:
using gentoo-dev-sources, go into /usr/src/linux/sound/pci/emu10k1/irq.c and change the return value on line 158 from "return IRQ_RETVAL(handled);" to "return IRQ_HANDLED;". this does the trick for me. hope it helps.
This sounds more like an acpi error to me. Have you built acpi into the kernel? If you have could you pass pci=noacpi on the kernel line? If you haven't built acpi into the kernel, could you try that?
i've built in acpi into the kernel. i've tried it with your advice now. i can tell you the outcome, if i have my machine running for some time again, without a reboot.
didn't help all too much.
irq 7: nobody cared!
Disabling IRQ #7
please change this simple line. it's working. it's the only thing that helps, i don't want to change that damn line, every kernel release by hand. please, i've tried the kernel mailing list, but they seem to have better things to do.
But that line just papers over what is happening in the driver, so it will
not be applied.
Try asking the sound driver author to fix this.