On Saturday 10 January 2009, Alan McKinnon wrote: > On Saturday 10 January 2009 12:26:09 Mick wrote: > > On Saturday 10 January 2009, Dale wrote: > > > Neil Bothwick wrote: > > > > On Fri, 9 Jan 2009 22:37:44 +0000, Mick wrote: > > > >> Filed a bug and it was suggested to me that I try > > > >> building the alsa drivers as modules. I tried it on for size and > > > >> guess what, it worked! > > > > > > > > AFAIR the Gentoo ALSA docs have always recommended building as > > > > modules. > > > > > > And yet I have never used modules for anything except Nvidia. That has > > > worked for me over 5 years now. What a puzzle. > > > > Same here. With three different machines I had alsa built in the kernel, > > less that six months or so after alsa first became part of the kernel > > (can't remember if I was running stable back then). > > My money says that if you track this down to the exact lines of code that > cause the problem, you'll find something along the lines of incorrect > loading order. As in, module A must load before module B, but you compiled > B into the kernel. Plus no dev picked it up and nobody coded a check for > it.
I noticed this when I built a kernel with sound as modules: CC [M] sound/core/pcm.o CC [M] sound/core/pcm_native.o sound/core/pcm_native.c: In function 'snd_pcm_fasync': sound/core/pcm_native.c:3255: warning: label 'out' defined but not used CC [M] sound/core/pcm_lib.o CC [M] sound/core/pcm_timer.o also noticed: LD [M] sound/pci/ac97/snd-ac97-codec.o LD sound/synth/built-in.o LD sound/usb/built-in.o LD vmlinux.o MODPOST vmlinux.o WARNING: modpost: Found 1 section mismatch(es). To see full details build your kernel with: 'make CONFIG_DEBUG_SECTION_MISMATCH=y' > I believe the correct technical term for this is "a software bug" :-) > > It's usually worth the effort to report a bug, the least that can happen is > someone else's life is easier in the future I have filed bug 253110 for my problem (sound) but not for the OP. -- Regards, Mick
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