Robert: I can also confirm the behavior of rebooting on +5V Barrel power, and no reboots when on USB power. Same hardware, same OS/Software, running on +5V barrel input reboots about three times per day, randomly. Same-same on USB power (iPhone 1A charger, no USB activity) has been running without reboot for almost two days, now.
I can also confirm that this reboot problem does NOT exist in 3.14. I have Debian 8.1/kernel 3.14 that have been running for multiple weeks on +5V barrel power, without reboot. There have been some significant recent changes to USB power that allow tablets to both push power out of a connector to power thumbdrives, etc, as well as take power in the SAME connector for battery charging. It is a kludge of a system if I have ever seen one. You might want to see if any of this new USB power code has affected things. --- Graham BBB1 -- Debian Image 2015-07-12 uname -a Linux BBB1 4.1.2-ti-r4 #1 SMP PREEMPT Thu Jul 16 20:48:37 UTC 2015 armv7l GNU/Linux ================================================ Power supply from Adafruit 2A on +5V barrel connector. Jul 18 15:42:10 Initial Boot Jul 18 15:50:47 My Reboot Jul 18 16:07:08 My Reboot after kernel update Jul 18 23:10:07 Autonomous Reboot Jul 19 05:27:54 Autonomous Reboot Jul 19 16:50:08 Test terminated for other power source testing =============================================== Power supply is Apple iPhone 5W (1A) on USB port Jul 19 17:05:48 My Reboot after power supply change :~# uptime (JUL 21) 13:20:13 up 1 day, 20:15, 1 user, load average: 0.00, 0.01, 0.05 ================================================= On Tuesday, July 21, 2015 at 7:54:11 AM UTC-5, RobertCNelson wrote: > > Thanks Maxim, > > On Tue, Jul 21, 2015 at 2:45 AM, Maxim Podbereznyy <[email protected] > <javascript:>> wrote: > > I could in my archive messages: > > > > I can confirm that the pulsing detected by PMIC on USB_DC signal is the > > probing from USB-OTG. > > > > > > > > After I disabled the USB-OTG in the kernel, the system has never > rebooted. > > Btw I also re-loaded Angstrom image (3.8 kernel) and Andrew's Android > image > > (with 3.8 kernel). I did not observe USB-OTG probing pulses on the VBus. > I > > believe in the 3.8 kernel, the USB-OTG has not been implemented/enabled. > > That might be reason why it seems that 3.8 kernel doesn't have the > random > > reboot behavior. > > > > In case anyone wants to test it out, here is the change in the source > code > > (NOTE: ignore the line and column numbers; just search for the struct > > "static struct omap_musb_board_data musb_board_data" ): > > This shouldn't be an issue, as we define what they are.. > > &usb0 { > status = "okay"; > dr_mode = "peripheral"; > }; > > &usb1 { > status = "okay"; > dr_mode = "host"; > }; > > but just in-case we have a regression somewhere else, i'll push out a > test with otg disabled. (it's enabled in 3.14.x and we need it for the > x15) > > 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.
