in the uEnv.txt file there's a line starting with "optargs=" Add to the end of that line: " video=HDMI-A-1:e"
make sure there's a space before the "video=....." and this should force the enabling of the HDMI port. Doug On Tuesday, February 4, 2014 9:06:03 AM UTC-8, joe2456001 wrote: > > HI Doug > I'm running into the same problem here using beagleboard black > running ubuntu-dsktop on a sd card > the /sys/class/drm/card0-HDMI-A-1/enabled shows disabled > cat /proc/cmdline shows this > console=ttyO0,115200n8 video capemgr=capemgr.enable_partno=BB-BONELT-HDMI > root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait > > > ubuntu@ubuntu-armhf:~$ cat /sys/devices/bone_capemgr.9/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-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI > > can u show me your uenv file? thx i try to edit my uenv doesn't work > best > jason > > > On Tuesday, January 28, 2014 8:39:04 PM UTC-5, doog wrote: >> >> I had looked at it and overlooked what was the problem but you asking and >> my copy/paste made me realize I'd cat'ed it onto the capemgr.disable.... >> mesg with a comma instead of separating it. It now works. Thanks for slap >> in the back of the head. >> >> Doug >> >> On Tuesday, January 28, 2014 5:29:22 PM UTC-8, Charles Steinkuehler wrote: >>> >>> On 1/28/2014 6:57 PM, doog wrote: >>> > I'm getting going with LinuxCNC Machinekit on BBB but my first hiccup >>> is >>> > that I can't get HDMI hardware enabled. I have an HDMI-DVI cable and >>> for >>> > whatever reason the hardware has to be told to turn on. With Angstrom >>> I >>> > pass "video=HDMI-A-1:e" on optargs in uEnv.txt but default Debian in >>> > Machinekit doesn't do it. >>> > >>> > is there something I can do to force it on/enabled from the command >>> line? >>> > I've tried shelling in with ssh -X then doing xrandr :0.0 --output >>> HDMI1 >>> > --auto but it didn't work. >>> > I'm checking /sys/class/drm/card0-HDMI-A-1/enabled and when booting >>> > Angstrom without a display connected it states "enabled" as it should. >>> > Booting Machinekit it states "disabled". >>> >>> First, are you sure the option is being passed to the kernel? What does >>> "cat /proc/cmdline" return? >>> >>> Second, have you tried the 'e' flag while also specifying a resolution? >>> Try something like: >>> >>> kms_force_mode=video=HDMI-A-1:1024x768@60e >>> >>> ...in /boot/uboot/uEnv.txt. >>> >>> -- >>> Charles Steinkuehler >>> [email protected] >>> >> -- 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/groups/opt_out.
