single codec, snd_dual_codec=0 ALSA ../alsa-kernel/pci/cs4281.c:1557: never read ISV3 and ISV4 from AC'97 CS4281 soundcard not found or device busy
modprobe AGAIN: loads OK. The same behaviour with not patched alsa-driver-0.9.0rc1 driver! Probably timeout too short. When I have increased the timeout 0.5 s the driver loaded OK on the first try (well, not always. I have to investigate it in more detail). Another test with Takashi patch: single codec installed, snd_dual_codec=1 ALSA ../../alsa-kernel/pci/ac97/ac97_codec.c:1458: AC'97 1:0 does not respond - RESET [REC_GAIN = 0xffff] CS4281 soundcard not found or device busy - this suggests autodetection should be possible. I have looked more on the hardware and found out that the clock signal on XTL_IN was too weak when the plate with additional codec was added. This signal is not connected to the secondary codec, but the length of the wire was enough to make it too weak. After I fixed the problem the driver patched by Takashi actually loaded with snd_dual_codec=1 ! I have seen: cat /proc/asound/card0/ac97#0 0-1/0: Cirrus Logic CS4299 rev 4 Capabilities : -headphone out- DAC resolution : 20-bit ADC resolution : 18-bit 3D enhancement : Crystal Semi 3D Stereo Enhancement Current setup Mic gain : +0dB [+0dB] POP path : pre 3D Sim. stereo : off 3D enhancement : off Loudness : off Mono output : MIX Mic select : Mic1 ADC/DAC loopback : off Extended ID : codec=3 rev=0 AMAP DSA=0 VRA Extended status : VRA PCM front DAC : 48000Hz PCM ADC : 48000Hz When I loaded the same driver with snd_dual_codec=0 I have got: cat /proc/asound/card0/ac97#0 0-0/0: Cirrus Logic CS4299 rev 4 Capabilities : -headphone out- DAC resolution : 20-bit ADC resolution : 18-bit 3D enhancement : Crystal Semi 3D Stereo Enhancement Current setup Mic gain : +0dB [+0dB] POP path : pre 3D Sim. stereo : off 3D enhancement : off Loudness : off Mono output : MIX Mic select : Mic1 ADC/DAC loopback : off Extended ID : codec=0 rev=0 AMAP DSA=0 VRA Extended status : VRA PCM front DAC : 48000Hz PCM ADC : 48000Hz But why there was always only a single codec listed in /proc/asound/card0/ ? Best regards, -- Tomasz Motylewski _______________________________________________________________ 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
