Hello Andrew, Erich ! > Le 21 sept. 2016 à 04:52, Andrew <ni...@seti.kr.ua> a écrit : > > Most of boards have some kind of watchdog on board (in MIO or in south > bridge), or some of them. For ex., iTCO_wdt for Intel, it87_wdt for ITE > MIO, and so on. > > But built-in watchdog behavior may differ depending board model (it may > reboot board, or it may just poweroff board, like ITE watchdog on old > Asus K8N). > > Also, Intel watchdog driver is loaded automatically, MIO watchdog > drivers are loaded manually (from command line or from /etc/modules). > > You can try it - load driver, and then do 'killall -9 watchdog' (to kill > watchdog process & simulate system hangup). If board will be rebooted - > all is OK. > Yes it does that indeed, I killed the watchdog0 and 1 plus the watchdog processes and my system rebooted, the drivers are already loaded in BUC ( lsmod gives iTCO_wdt ), no need to load anything, but it’s good to know how it works. But my question still stands, there is no hardware lockup watchdog timer, it has to be an external contraption which would detect an absence of activity on the motherboard and activate the hardware reset button… I’ve seen some wifi switches that do this for routers (https://www.amazon.com/gp/product/B01BU2ALGO/ for exemple). It does not ship to Canada though :-) !!! I’ve started some preliminary tests to perform the same basic thing using an Arduino on one of BUC’s USB port, and it looks promising… if you are interested I could let you know how it goes ! bye !
> On 21.09.2016 05:29, Jean-Roch Blais wrote: >> Hello List, >> >> My previous pentium IV motherboard running BUC 5.1.7 was randomly crashing, >> I had to use hard reset to start it again, and it would run fine, as long as >> there was no intense traffic, I guess... >> Since then I replaced it with another one running BUC 5.2.5, as one can >> probably tell from my dhcpcd/dnsmasq adventure in my previous e-mails to the >> list… >> >> This made me wonder how the watchdog timer was working on BUC. I think >> Erich Titl mentioned in some previous mail that the software watchdog was >> writing to /dev/watchdog every 10 seconds to prevent a system reboot/reset. >> This prevents software lockups but does not cover hardware problems like the >> one I experienced with my sick mobo. Obviously if the CPU is not running >> you’re hanged :-) . >> >> Has anybody ever worked on an external hardware watchdog reset timer that >> would do such a hardware reset ? >> >> Thank’s >> >> jrb >> >> ------------------------------------------------------------------------------ >> ------------------------------------------------------------------------ >> leaf-user mailing list: leaf-user@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/leaf-user >> Support Request -- http://leaf-project.org/ > > > > ------------------------------------------------------------------------------ > ------------------------------------------------------------------------ > leaf-user mailing list: leaf-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/leaf-user > Support Request -- http://leaf-project.org/ ------------------------------------------------------------------------------ ------------------------------------------------------------------------ leaf-user mailing list: leaf-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/leaf-user Support Request -- http://leaf-project.org/
