Hello Kevin,
I am using 4.1.33-bone-rt-r24 kernel for 1553 Drive,too . I should disable 
HDMI pin. Did you achive disabling HDMI pin ?

9 Şubat 2017 Perşembe 01:32:33 UTC+3 tarihinde [email protected] 
yazdı:
>
> During boot I am getting a "Failed to start Cape Manager Service." failure
>
> I have a custom cape that gets loaded via /uEnv.txt along with BB_SPIDEV0, 
> both show up in slots
>
> my problem is that the disable for HDMI does not work as the pinmux still 
> shows the hdmi pins as assigned.
>
> *OS Version*
> uname -r 4.1.38-bone-rt-r24
>
> # systemctl status capemgr.service -l
> ● capemgr.service - Cape Manager Service
>    Loaded: loaded (/lib/systemd/system/capemgr.service; enabled)
>    Active: failed (Result: exit-code) since Wed 2017-02-08 14:48:51 CST; 
> 2min 44s ago
>   Process: 313 ExecStart=/bin/sh /opt/scripts/boot/capemgr.sh 
> (code=exited, status=1/FAILURE)
>  Main PID: 313 (code=exited, status=1/FAILURE)
>
>
> I have tried several different versions of the disable_partno I have found.
> ========= /uEnv.txt
> ##This will work with: Angstrom's 2013.06.20 u-boot.
>
> loadaddr=0x82000000
> fdtaddr=0x88000000
> rdaddr=0x88080000
>
> initrd_high=0xffffffff
> fdt_high=0xffffffff
>
> #for single partitions:
> mmcroot=/dev/mmcblk0p1
> optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
> dtb=am335x-boneblack-emmc-overlay.dtb
> cape_enable=bone_capemgr.enable_partno=BB-GPIO-1553,BB-SPIDEV0
>
> loadximage=load mmc 0:1 ${loadaddr} /boot/vmlinuz-${uname_r}
> loadxfdt=load mmc 0:1 ${fdtaddr} /boot/dtbs/${uname_r}/${fdtfile}
> loadxrd=load mmc 0:1 ${rdaddr} /boot/initrd.img-${uname_r}; setenv rdsize 
> ${filesize}
> loaduEnvtxt=load mmc 0:1 ${loadaddr} /boot/uEnv.txt ; env import -t 
> ${loadaddr} ${filesize};
> loadall=run loaduEnvtxt; run loadximage; run loadxfdt;
>
> mmcargs=setenv bootargs console=tty0 console=${console} ${optargs} 
> ${cape_disable} ${cape_enable} root=${mmcroot} rootfstype=${mmcrootfstype} 
> ${cmdline}
>
> uenvcmd=run loadall; run mmcargs; bootz ${loadaddr} - ${fdtaddr};
>
>

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