On 10-07-08 01:24, Arthur Marsh wrote: > Hi, I am having trouble getting sound working in an old Compaq Armada > 1750 with an ESS AudioDrive ES1869. > > Even when it's working (verified by aplay some-sound.wav), KDE 3.5.9 > sound doesn't always work )-:. KDE 3.5.9 uses aRts which, I'm sorry to say, is simply unsalvageable. > Attached are a working and non-working configurations from alsa-info.sh The difference would seem to be that your working configuration uses two 8-bit DMA channels (dma1=0, dma2=1) while the non-working one uses a 16-bit channel for dma2 (the playback channel). The driver source indeed warns that 16-bit DMA appears broken. It's the Compaq BIOS which tells the driver which resources the card can use so does it perhaps provide a way to fix the DMA channel(s) to 8-bit channels (0,1 and 3)? > What appears to be needed is a way to forcing the sound chip into a > known working start upon start-up. > > Does anyone have any suggestions? The BIOS route is preferred but if the setup provides nothing useful you should be able to force the channels by echoing stuff into /sys before the driver loads. To test, unload the driver # modprobe -r snd-es18xx and do a # cat /sys/devices/pnp0/00:0c/resources It should at this point be "state=disabled". Force the DMA channels by doing: # echo -n set dma 0 dma 1 > /sys/devices/pnp0/00:0c/resources and reload the driver: # modprobe snd-es18xx Another # cat /sys/devices/pnp0/00:0c/resources should now confirm that the chip is using dma channels 0 and 1 and sound is expected to work. You're not going to want to do this at each boot and given the 16-bit DMA channel comment and lack of es18xx hardware that can use DMA by both author and myself I get the feeling that simply disabling 16-bit DMA might be the best thing and this might be worth a PnP quirk, certainly if you can't actually force an 8-bit channel in the BIOS. Your /sys/devices/pnp0/00:0c/id should say either ES1968 or ES1978. Which one? Could you also post your /sys/devices/pnp0/00:0c/options? The contents of /sys/devices/pnp0/00:0c/resources directly at bootup before the driver has loaded is also interesting. To keep the driver from loading on a udev system, you probably need to blacklist it temporarily (add snd-es18xx to /etc/modprobe.d/blacklist). Rene. ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
