can't get alsa 1.0.21 to work with kernel 2.6.31

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Hello

I have been trying to compile and load the latest (1.0.21) ALSA, but I keep getting unknown symbol errors. I first tried building against the 2.6.30.5 kernel, which had been working fine for me apart from specific intel audio issues, but I got unknown symbol errors. I made sure to recompile the kernel first with alsa and oss disabled, and I checked, using the time of creation, that the sound modules in /lib/modules/2.6.30.5 were the ones I had compiled.

I then built a fresh 2.6.31 kernel and tried again, but got the same errors (see below).

Have I made a mistake somewhere, or is there a fundamental incompatibility between the kernel and alsa versions? If the latter, what combination could I choose that would keep the kernel at version 2.6.30 or later (due to graphics driver issues), while still having mic level controls that work properly on a Conexant Venice device (which I understand was fixed in very recent ALSA versions)?

Many thanks
Robert

root@ermintrude:/usr/src/alsa-driver-1.0.21# modprobe snd_hda_intel
FATAL: Error inserting snd (/lib/modules/2.6.31/kernel/sound/acore/snd.ko): Unknown symbol in module, or unknown parameter (seedmesg)
WARNING: Error running install command for snd
WARNING: Error inserting snd_pcm (/lib/modules/2.6.31/kernel/sound/acore/snd-pcm.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting snd_hwdep (/lib/modules/2.6.31/kernel/sound/acore/snd-hwdep.ko): Unknown symbol in module, or unknown parameter (see dmesg)
WARNING: Error inserting snd_hda_codec (/lib/modules/2.6.31/kernel/sound/pci/hda/snd-hda-codec.ko): Unknown symbol in module, or unknown parameter (see dmesg)
FATAL: Error inserting snd_hda_intel (/lib/modules/2.6.31/kernel/sound/pci/hda/snd-hda-intel.ko): Unknown symbol in module, or unknown parameter (see dmesg)
root@ermintrude:/usr/src/alsa-driver-1.0.21# dmesg
......
[ 1262.146892] snd: Unknown symbol unregister_sound_special
[ 1262.147840] snd: Unknown symbol register_sound_special_device
[ 1328.385494] snd: Unknown symbol unregister_sound_special
[ 1328.386139] snd: Unknown symbol register_sound_special_device
[ 1328.388946] snd_timer: Unknown symbol snd_info_register
[ 1328.389145] snd_timer: Unknown symbol snd_info_create_module_entry
[ 1328.389351] snd_timer: Unknown symbol snd_info_free_entry
[ 1328.389674] snd_timer: Unknown symbol __snd_printk
[ 1328.389847] snd_timer: Unknown symbol snd_iprintf
[ 1328.390128] snd_timer: Unknown symbol snd_ecards_limit
[ 1328.390328] snd_timer: Unknown symbol snd_oss_info_register
[ 1328.390493] snd_timer: Unknown symbol snd_unregister_device
[ 1328.390735] snd_timer: Unknown symbol snd_device_new
[ 1328.391152] snd_timer: Unknown symbol snd_register_device_for_dev

-- 
Robert Persson

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