On Mon, Feb 15, 2016 at 4:00 PM, joelk <[email protected]> wrote: > > Thanks John, I have seen Derek's videos and other resources, and I've > ordered a C920 but haven't received it yet. We'll see, but frankly I doubt > that it will solve these issues completely. I find it hard to believe that > cpu load is the main issue here. For example, I just booted up with the > webcam unplugged. I plugged it in, checked dmesg to see that the webcam and > uvcvideo were registered and seemed to be working, and they were. I ran > v4l2-ctl --all to verify that I could connect to the camera. Then I > immediately rebooted (sudo reboot), leaving the camera plugged in to the usb > jack. Guess what? No good! When I try to run > v4l2-ctl --all I get: > Failed to open /dev/video0: Permission denied > > I hesitate to post the entire output from dmesg, but here's the last section > -- this entire group of lines was repeated 4 times: > > [ 601.019165] INFO: task v4l_id:551 blocked for more than 120 seconds. > [ 601.025624] Not tainted 4.1.15-ti-rt-r40 #1 > [ 601.031932] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 601.040887] v4l_id D c09d0558 0 551 1 0x00000001 > [ 601.041028] [<c09d0558>] (__schedule) from [<c09d08ac>] > (schedule+0x58/0xe4) > [ 601.041089] [<c09d08ac>] (schedule) from [<c09d1c88>] > (__rt_mutex_slowlock+0xf4/0x188) > [ 601.041142] [<c09d1c88>] (__rt_mutex_slowlock) from [<c09d2284>] > (rt_mutex_slowlock+0x13c/0x338) > [ 601.041192] [<c09d2284>] (rt_mutex_slowlock) from [<c09d24f4>] > (rt_mutex_lock+0x74/0x78) > [ 601.041245] [<c09d24f4>] (rt_mutex_lock) from [<c0094e4c>] > (__rt_down_read+0x3c/0x4c) > [ 601.041298] [<c0094e4c>] (__rt_down_read) from [<c0094e78>] > (rt_down_read+0x1c/0x20) > [ 601.041515] [<c0094e78>] (rt_down_read) from [<bf0f0064>]
Humm... how about without the RT patchset? sudo apt-get update sudo apt-get install linux-image-4.1.17-ti-r48 sudo reboot (you can return to the previous kernel vit uname_r= in /boot/uEnv.txt ) Regards, -- Robert Nelson https://rcn-ee.com/ -- 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.
