On 2013-11-20 00:49, cmsv wrote: > I have not seen this issue but i have another issue in hands which > forces me to cold reboot some routers. > It is described here: > http://www.mail-archive.com/openwrt-devel@lists.openwrt.org/msg20575.html > > The causes the ath9k 9**** router to freeze but i do believe that it is > related to tcp traffic and iptables since i have found a work around to > prevent the router to freeze. I will post later my conclusions regarding > this issue. > > > I also noticed another very strange occurrence related to the freezes. > > # ls > % > 77000 > 770?????H?H?H?H?H?H?H?H?H?H?H?H????$ > 9?0000} > Enter > Z^B????{[2]+: > bin > dev > etc > lib > mnt > overlay > proc > rom > root > r?[J??[J????????????[12Du > r?[J??[J????????????? > sbin > sys > tmp > usr > var > www > ?^@^@^@^@^@^A[ > ?^@^@^??????1000] > ? > ? > ?????0?????s > ?&L?00] ?[ > ?&L?00] ?[ ` 1w>????????s>? > ???z > ?????}????????i???~??kX??^@^@~@^B^@^H!B?^H^H > ?j?j?j?j?j??????????i??%R? > > I have not found out why i get these files in / > Al this only happens with AR9*** I'm pretty sure your serial console is picking up garbage input. The freezes themselves are probably caused by the sysrq magic sequence appearing in that garbage. A while back I've committed a patch to trunk that makes it stop processing the sysrq sequence from the serial port. I have now backported this to AA in r38863. Please test if this resolves your freezes (although you will probably still get garbage files in /). If you want to make sure that this doesn't happen, build an image with serial console support disabled - I don't think this is a software bug.
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