Hi Zsolt, Nikolay, and all others working on the agrsm-HDA code: Further investigation reveals that this kernel (2.6.30) uses alsa 1.0.20. It is worth noting that this version once again has symbols for reading and writing to the HDA codecs in the code (see hda_codec.c in sound/pci/hda of the kernel source, lines like EXPORT_SYMBOL_HDA(snd_hda_codec_read); ) These are the interfaces to the HDA card, which were essentially re-implemented in the HDA.c file of the driver. (You may recall earlier versions of the driver required kernel/alsa recompilation and manually adding the export_symbol lines). I've been going through the code and updating the various HDA.c access routines to match the alsa 1.0.20 code, but I still get errors. I will hopefully be able to trace the exact line causing the problem sometime next weekend. (Debugging is quite time-consuming, since the system must be rebooted after each panic- otherwise modprobe hangs). At this point though, I do have the following suggestions for future kernel support, if these are feasible: 1. Revert to using the symbols supplied by ALSA-- this will reduce breakage with newer kernels and updated ALSA code (hopefully). 2. Get the code to use the hda_codec.h and serial26.c in the kernel tree to reduce the need to update these as frequently. I will report more as I find out. Best, Bjorn. Nikolay Zhuravlev wrote: > Bjorn, > > Same here with the 2.6.30 rc6. The modules compile Ok but wvdialconf > segfaulted and messed up the kernel too. > My patched "6mdv" sources are more or less the same as "7mdv". > dmesg reports 'null pointer dereference', this is not good... > > <<<< > [ 235.790591] * Hello Agere Driver ** > [ 236.937771] Loading module Agere Modem Controller driver version 2.1.80 (2008 > -10-31) > [ 251.857186] ttyAGS3 at I/O 0x8004 (irq = 22) is a AgereModem > [ 251.857413] Loading module Agere Modem Interface driver version 2.1.80.0 (200 > 8-10-31) > [ 271.833830] ==> codecType = 0x32 > [ 271.833858] BUG: unable to handle kernel NULL pointer dereference at 0000002b >
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