If you're using kernel 4.x you should stop reading anything on adafruit's web pages unless you know how to parse old outdated information. Which obviously you do not.
So . . . sys/devices won't always exist. but /sys/devices should. You need the forward slash unless your current working directory is / ( or root ). When used without the precceding forward slash, Linux will only look as far as your current working directory for sys/devices/ As to your specific problem. It's because you're not paying close attention to what you're doing, and what Robert explained to you yesterday. *cmdline=coherent_pool=1M quiet cape_universal=enable* #In the event of edid real failures, uncomment this next line: *cmdline=coherent_pool=1M quiet cape_universal=enable video=HDMI-A-1:x800@400e* You need to comment out the cmdline= line that you're not using. As you can only have one cmdline= statement. On Tue, Jun 21, 2016 at 8:56 AM, epi kao <[email protected]> wrote: > > Hello all, > > *I have try to understand export/unexport overlay with following link:* > > https://learn.adafruit.com/introduction-to-the-beaglebone-black-device-tree/exporting-and-unexporting-an-overlay > > But then i don't found the folder "sys/devices/" > > So i have try to remove the # at the line > #cape_disable=bone_capemgr.disable_partno= , on the uEnv.txt file. > > But after reset, the hdmi-output has switched off. > *So I have change the uEnv.txt file back to orginal, but unfortunately the > hdmi is not working anymore?? :-(* > > Please find below my current uEnv.txt file, so whats wrong now? - and how > can i access/enable overlays like the LCDcap?: > > uname_r=4.1.15-ti-rt-r43 > #uuid= > #dtb= > > ##BeagleBone Black/Green dtb's for v4.1.x (BeagleBone White just works..) > > ##BeagleBone Black: HDMI (Audio/Video) disabled: > #dtb=am335x-boneblack-emmc-overlay.dtb > > ##BeagleBone Black: eMMC disabled: > #dtb=am335x-boneblack-hdmi-overlay.dtb > > ##BeagleBone Black: HDMI Audio/eMMC disabled: > #dtb=am335x-boneblack-nhdmi-overlay.dtb > > ##BeagleBone Black: HDMI (Audio/Video)/eMMC disabled: > #dtb=am335x-boneblack-overlay.dtb > > ##BeagleBone Black: wl1835 > #dtb=am335x-boneblack-wl1835mod.dtb > > ##BeagleBone Green: eMMC disabled > #dtb=am335x-bonegreen-overlay.dtb > > cmdline=coherent_pool=1M quiet cape_universal=enable > > #In the event of edid real failures, uncomment this next line: > cmdline=coherent_pool=1M quiet cape_universal=enable > video=HDMI-A-1:x800@400e > > ##Example v3.8.x > #cape_disable=capemgr.disable_partno= > #cape_enable=capemgr.enable_partno= > > ##Example v4.1.x > #cape_disable=bone_capemgr.disable_partno= > #cape_enable=bone_capemgr.enable_partno= > > ##Disable HDMI/eMMC (v3.8.x) > > #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G > > ##Disable HDMI (v3.8.x) > #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN > > ##Disable eMMC (v3.8.x) > #cape_disable=capemgr.disable_partno=BB-BONE-EMMC-2G > > ##Audio Cape (needs HDMI Audio disabled) (v3.8.x) > #cape_disable=capemgr.disable_partno=BB-BONELT-HDMI > #cape_enable=capemgr.enable_partno=BB-BONE-AUDI-02 > > > ##enable Generic eMMC Flasher: > ##make sure, these tools are installed: dosfstools rsync > #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh > > thanks > > -- > 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/34a7a95e-715f-4f64-81ed-e8f4330323aa%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/34a7a95e-715f-4f64-81ed-e8f4330323aa%40googlegroups.com?utm_medium=email&utm_source=footer> > . > 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORpAEykErkDnbSreb3TWJuP6K0WUe%3DHXDndJd2_PAZczuw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
