Hi All, I am trying to rule out SW issues with my BBB (HW Rev A5C) running Angstrom. First I am going to give a bit of background on when the issues started and then provide dumps of crashed as seen via UART.
1. BBB was working fine for quite some time. 2. Then I tried to switch from wired ethernet to wireless by plugging in UWN200 (http://www.logicsupply.com/components/networking/wireless/uwn200/) while BBB was powered by DC adapter. 3. My SSH over wired Ethernet froze. 4. I removed the UWN200 and rebooted a device but could not longer connect via SSH with wired ethernet 5. Connecting via USB (client) I could not get network connection to 192.168.7.2 either. As I realized later I did not even have usb0 listed when running ifconfig 6. At this point I connected via UART 7. I could see that the kernel was crashing with NULL pointer dereference Oops 8. Every few restarts it would get past this oops 9. I shutdown BBB and looked to upgrade to latest Angstrom a few days later, thinking maybe I am just a lucky one to hit a real bug in the kernel 10. I downloaded the following image https://s3.amazonaws.com/angstrom/demo/beaglebone/BBB-eMMC-flasher-2013.09.04.img.xz into SD card 11. BBB was booted from SD by holding the boot button. 12. Flashing process was problematic, it took a few reboots (about) from SD card for eMMC flashing to complete (4 solid LEDs) without kernel Oopsing - One of the Oopses was odd as it was for "invalid instruction" To me this feels like a HW problem due to failures manifesting themselves in different ways. Segfaults in the apps, NULL pointer dereferences in the kernel, Soft CPU lockups. But I would like to rule out a user error. Few observations: - I have run mtest from uboot without any errors being detected - Same for memtester - Pressing rest button does not always reboot the device. Sometimes holding power button down is the only way to reboot the BBB. But sometimes it works just fine. - For a few reboots accessing BBB via HTTP would causes kernel Oopses. Trying it out just now and it worked just fine The below is done post flashing to the latest angstrom: - systemd once segfaulted during boot: http://pastebin.com/YFuxNs8e - some times system boots just fine: http://pastebin.com/7HynL8H7 - "opkg upgrade" consistently segfaults - "opkg install strace" consistently segfaults Any suggestions on what I can do to narrow down the root cause of the issue would be greatly appreciated. Thank you, Vladimir -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
