Re: Restart after 4 min of operation?
On 11/02/2009 08:35 PM, Bill Gatliff wrote: Guys: Can someone give me any ideas as to why my Beagleboard-like platform would spontaneously restart after precisely four minutes of operation? No OOPS, no nothing. This is with 2.6.32-rc5. BeagleBoard like? More details are probably required for much help. How do you power it? My BeagleBoard is powered via the OTG. I've seen it reset if I hang too much on the USB host port (exceed the meager power budget) -- Gary Thomas | Consulting for the MLB Associates |Embedded world -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Restart after 4 min of operation?
Gary Thomas wrote: On 11/02/2009 08:35 PM, Bill Gatliff wrote: Guys: Can someone give me any ideas as to why my Beagleboard-like platform would spontaneously restart after precisely four minutes of operation? No OOPS, no nothing. This is with 2.6.32-rc5. BeagleBoard like? More details are probably required for much help. How do you power it? My BeagleBoard is powered via the OTG. I've seen it reset if I hang too much on the USB host port (exceed the meager power budget) It's a clone of a BeagleBoard, but with more and friendlier I/O. CUS package, and they use the TPS65023RSB power supply manager. I'm not ready to bury anyone in more details yet, since it's a client's hardware and I feel like I'm imposing already... :) When I boot it to my kernel, which is based on 2.6.32-rc5, it comes up fine and then for no apparent reason after four minutes goes through a reset again. I know it's approximately the same each time, because I have uptime running in a loop so that I can conveniently see when it dies. The very same tree boots and runs properly on a true BeagleBoard rev C. What's even more wierd is that even when sitting at the u-boot prompt before launching any kernel at all, the board does the same thing--- spontaneous reset after about four minutes. The client provided me the u-boot image, and it says it's a modified one from the OMAP3EVM--- it even provides that machine id. The above behavior makes me suspect hardware, but read on before you agree. Finally, the client provided me a kernel of unknown origin (it says it's a 2.6.29-rc2) that appears to run fine no hiccup at 4 minutes. Of course, that kernel doesn't have the features they need. I'm going over it now to see if there's a magic bit somewhere that mine is missing, but I'm at a bit of a loss to explain what I'm seeing right now. Anyone have any ideas? Bizzare. (BTW, nice to hear from you again, Gary! It's been a while.) b.g. -- Bill Gatliff b...@billgatliff.com -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: Restart after 4 min of operation?
Gary Thomas wrote: On 11/02/2009 08:35 PM, Bill Gatliff wrote: Guys: Can someone give me any ideas as to why my Beagleboard-like platform would spontaneously restart after precisely four minutes of operation? No OOPS, no nothing. This is with 2.6.32-rc5. BeagleBoard like? More details are probably required for much help. How do you power it? My BeagleBoard is powered via the OTG. I've seen it reset if I hang too much on the USB host port (exceed the meager power budget) It's a clone of a BeagleBoard, but with more and friendlier I/O. CUS package, and they use the TPS65023RSB power supply manager. I'm not ready to bury anyone in more details yet, since it's a client's hardware and I feel like I'm imposing already... :) When I boot it to my kernel, which is based on 2.6.32-rc5, it comes up fine and then for no apparent reason after four minutes goes through a reset again. I know it's approximately the same each time, because I have uptime running in a loop so that I can conveniently see when it dies. The very same tree boots and runs properly on a true BeagleBoard rev C. What's even more wierd is that even when sitting at the u-boot prompt before launching any kernel at all, the board does the same thing--- spontaneous reset after about four minutes. The client provided me the u-boot image, and it says it's a modified one from the OMAP3EVM--- it even provides that machine id. The above behavior makes me suspect hardware, but read on before you agree. Finally, the client provided me a kernel of unknown origin (it says it's a 2.6.29-rc2) that appears to run fine no hiccup at 4 minutes. Of course, that kernel doesn't have the features they need. I'm going over it now to see if there's a magic bit somewhere that mine is missing, but I'm at a bit of a loss to explain what I'm seeing right now. Anyone have any ideas? Bizzare. I suspect a watchdog timer of some kind, but I haven't got a clue which one. There is a register - PRM_RSTST (address 0x48307258) that you could read and maybe it will tell you what was the source of the reset. - Anand (BTW, nice to hear from you again, Gary! It's been a while.) b.g. -- Bill Gatliff b...@billgatliff.com -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Restart after 4 min of operation?
Gadiyar, Anand wrote: I suspect a watchdog timer of some kind, but I haven't got a clue which one. Turns out I had disabled watchdog timer support in my kernel. Re-enabling it seems to have addressed the problem--- the system has run for more than 5 minutes now. :) Apparently, the default for the OMAP watchdog timer is armed at reset? Interesting. b.g. -- Bill Gatliff b...@billgatliff.com -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Restart after 4 min of operation?
On 11/03/2009 11:37 AM, Bill Gatliff wrote: Gadiyar, Anand wrote: I suspect a watchdog timer of some kind, but I haven't got a clue which one. Turns out I had disabled watchdog timer support in my kernel. Re-enabling it seems to have addressed the problem--- the system has run for more than 5 minutes now. :) Apparently, the default for the OMAP watchdog timer is armed at reset? Interesting. I'm pretty sure this is set up in U-Boot. If I were you, I'd ask the customer for the U-Boot modifications so you can check what they've done. -- Gary Thomas | Consulting for the MLB Associates |Embedded world -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: Restart after 4 min of operation?
Bill Gatliff wrote: Gadiyar, Anand wrote: I suspect a watchdog timer of some kind, but I haven't got a clue which one. Turns out I had disabled watchdog timer support in my kernel. Re-enabling it seems to have addressed the problem--- the system has run for more than 5 minutes now. :) Apparently, the default for the OMAP watchdog timer is armed at reset? Interesting. Just read a little on the MPU watchdog timer. It looks like the default values would have caused a reset after ~10s. So if your board is rebooting after 4 minutes, maybe the bootloader is turning it on? I've left a board on in the bootloader for hours without seeing a reboot, so either the bootloader I was using disables the watchdog, or it's not armed at reset. - Anand-- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
