OK so from this page: http://elinux.org/BBB_Audio_Cape_RevB_Getting_Started
*Since this Audio Cape uses the same audio signal from the onboard HDMI > interface, you need to disable the audio portion of the HDMI by edit the > uEnv.txt at /boot/uboot. Add this line to the uEnv.txt file: * > > * optargs=capemgr.disable_partno=BB-BONELT-HDMI* > > *Reboot your BBB. Log in and check the capemgr: * > > * root@beaglebone:~# cat /sys/devices/bone_capemgr*/slots > 0: 54:PF--- > 1: 55:PF--- > 2: 56:PF--- > 3: 57:PF--- > 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G > 5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI > 6: ff:P-O-L Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN* > > If memory serves HDMIN is the audio portion of the hdmi output. So the wiki is wrong. And seems I'm correct. debian@beaglebone:~$ *cat /boot/uEnv.txt* #Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0 uname_r=3.8.13-bone70 #dtb= cmdline=quiet init=/lib/systemd/systemd ##Example #cape_disable=capemgr.disable_partno= #cape_enable=capemgr.enable_partno= ##Disable HDMI/eMMC #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G ##Disable HDMI #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN ##Disable eMMC #cape_disable=capemgr.disable_partno=BB-BONE-EMMC-2G *##Audio Cape (needs HDMI Audio disabled)#cape_disable=capemgr.disable_partno=BB-BONELT-HDMI#cape_enable=capemgr.enable_partno=BB-BONE-AUDI-02* ##enable BBB: eMMC Flasher: ##make sure, these tools are installed: dosfstools rsync #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh On Sat, Jul 4, 2015 at 12:25 AM, <[email protected]> wrote: > > > On Friday, July 3, 2015 at 9:59:05 PM UTC-6, William Hermans wrote: >> >> There was a change between 3.8.13-bone68, and 3.8.13-bone69 related to >> I2C as I recall. That caused his problem. >> > > Thanks William. I read that thread (which has more to do with Audio > Cape's conflicts with the LCD Cape) and tried on a whim just commenting out > pins 18 and 19, plus renaming the dtbo to BB-BONE-AUDI-03 but nothing > changed... P9_28 is still flat when playing sound. > > > > > >> >> Full post is here, and was quite recent: >> https://groups.google.com/forum/#!searchin/beagleboard/audio$20cape|sort:date/beagleboard/2dXgKp9T8_g/j6o9Q8Jy2-QJ >> >> On Fri, Jul 3, 2015 at 8:35 PM, <[email protected]> wrote: >> >>> >>> >>> On Friday, July 3, 2015 at 7:14:16 PM UTC-6, [email protected] >>> wrote: >>>> >>>> What distro and version are you using? I know on Debian after a certain >>>> build ( I don't know which ) that BB-BONE-AUDI-02 is installed as part of >>>> the kernel - if this is your case then the dts you are looking at may not >>>> be the same at kernel dtbo is using - just a thought.... >>>> >>>> I had this issue with 3.13.8-bone70 >>>> >>> >>> I'm using >>> >>> Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 >>> armv7l GNU/Linux >>> >>> I'm not sure what you're saying though. I know that >>> /lib/firmware/BB-BONE-AUDI-02.dtbo is the right one because I compiled it >>> myself from the dts. Are you saying that it may conflict with another one >>> already hardcoded in the kernel? >>> >>> When you had this issue, how did you resolve it? >>> >>> I suppose I could unload the dtbo and see if P9_28 comes to life?! >>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
