You wrote: >> [Summary: ALSA doesn't work with the VIA VT8233A chipset, found on >> some KT333-based motherboards] > > I have this board and I get the same problem. > It uses a Realtek chipset for the sound (ALC 650) that is not listed in the > ac97_codec.c file.
Thank you. :) By investigating further I actually discovered that. Actually, based on this: http://www.linuxhq.com/kernel/v2.4/unofficial/patch200202/44.html adding ALC 650 awareness to ALSA 0.9.0rc1 isn't too hard, theorically: just patch alsa-kernel/pci/ac97/ac97_codec.c with the following: --------------------------------------------------------------------------- --- alsa-kernel/pci/ac97/ac97_codec.c.old Sat May 4 04:27:30 2002 +++ alsa-kernel/pci/ac97/ac97_codec.c Sat May 4 04:33:49 2002 @@ -108,6 +108,7 @@ { 0x414c4310, 0xfffffff0, "RL5382", NULL }, { 0x414c4320, 0xfffffff0, "RL5383", NULL }, { 0x414c4710, 0xffffffff, "ALC200/200P", NULL }, +{ 0x414c4720, 0xfffffff0, "ALC650", NULL }, { 0x43525900, 0xfffffff8, "CS4297", NULL }, { 0x43525910, 0xfffffff8, "CS4297A", NULL }, { 0x42525920, 0xfffffff8, "CS4294/4298", NULL }, --------------------------------------------------------------------------- That's in theory anyway. The bad news is that... in practice it's not sufficient to get it to work. Oh well. More precisely, the system still freezes if I modprobe snd-via8233 from runlevel 4 with the desktop environment running. It still works when I modprobe at runlevel 1, but the sound still doesn't work -- in a different way now. ALSA software actually /can/ open the sound device now, but when it tries to write to it, I get an I/O error. > I also try the drivers provided by realtek (based on Alsa 0.5.10) and they > do not work too. > ftp://ftp.realtek.com.tw/sound/ac97codec/linux/linux.zip I'll give them a look. Thanks. :) Maybe by fiddling with them and ALSA 0.9.0rc1 I can get the whole thing to work (yeah, well, I can dream, can't I? :)). >From the look of those sources there is some register pokepoking to do when writing to an ALC 650 chipset. I'll try just that. CC'ed to alsa-devel, since it's kinda devel-relevant now. (The original message, for the sake of alsa-devel's readers, can be found here: http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg03164.html) -- S. _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
