Date: Sat, 26 Nov 2016 16:19:38 -0800 From: "Jack L." <xxjack12xx@gmail.com> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Old laptop not able to get enough entropy in FreeBSD 11 Message-ID: <CALeGphyXVVKVoaFRtM9COKhCHCvzDQ83edT9B=135vUC_vvWKA@mail.gmail.com> In-Reply-To: <20161126150144.GA65709@becker.bs.l> References: <CALeGphz-dL9jwy7=8hN0p7YtmY=ad-dgi7Ee2NqRtuURk%2Bu1ew@mail.gmail.com> <20161109121030.2f678bea@gumby.homeunix.com> <CALeGphx=UBhBmE4X_Q3H%2BwE3Zg=Tki_EWmVAs-728fjuMPzJxw@mail.gmail.com> <CALeGphyfmSCy8dOg-8_JHm=P6o6ucNhV2TsAZGxWMo-PULAAqg@mail.gmail.com> <20161126033259.GA57873@becker.bs.l> <CALeGphz3dm_u2OTbrzwh1y0eR2rqHDZMtfQFWG3fa6qsw7ijhA@mail.gmail.com> <20161126150144.GA65709@becker.bs.l>
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On Sat, Nov 26, 2016 at 7:01 AM, Bertram Scharpf <lists@bertram-scharpf.de> wrote: > On Friday, 25. Nov 2016, 20:06:55 -0800, Jack L. wrote: > > On Fri, Nov 25, 2016 at 7:32 PM, Bertram Scharpf < > lists@bertram-scharpf.de> > > wrote: > > > > > On Friday, 25. Nov 2016, 18:31:24 -0800, Jack L. wrote: > > > > >> > I have an old single core AMD Turion ML-37 laptop that has > nothing > > > > >> > installed. When I boot it up, the moment it displays login:, it > hangs > > > > >> > until i press some random keys. At shutdown, it will hang until > I > > > > >> > press keys and it will not move onto the next line of shutdown > until > > > > >> > I keep pressing keys. > > > > >> > > > > > >> > If I cat /dev/random > ./dev/null while using the laptop, it > works > > > > >> > fine but when nothing is happening, the laptop hangs. Any > ideas? It's > > > > >> > running 11.0-STABLE > > > > > > > > > > Any ideas on why the laptop would have that behavior in 11? It > didn't hang > > > > > at all in 10.3-STABLE > > > > > > > > > I just installed 12-CURRENT on the laptop and it also hangs even at > > > > install/boot/shutdown until I hit keys, then it will move as long as > I > > > > continue to hit keys. I also found that if I ping the laptop, it will > > > > respond but in between pings, it will hang. Using FreeBSD 10.3, it > works > > > > perfectly fine without any random keypresses. Any ideas? > > > > > > I'm convinced this behaviour it worth being analysed. > > > > > > Can you gain any knowlegde by calling cat through truss? > > > > How should I run that? > > Sorry, that was probably too fast. > > You could run one of those: > > # truss cat /dev/random >/dev/null > # truss dd if=/dev/random of=/dev/null bs=512 count=3 > > But they will show just a series of read-write calls until a > read will hang. The detain presumably occurs in the random > device. That's kernel stuff. Does anybody have a hint how to > debug that without influencing the behaviour in question? > So truss cat /dev/random >/dev/null will keep going and going and going and going truss dd if=/dev/random of=/dev/null bs=512 count=3 sits there and hangs with no activity until i hit a key, then the dd happens. > Bertram > > > -- > Bertram Scharpf > Stuttgart, Deutschland/Germany > http://www.bertram-scharpf.de > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions- > unsubscribe@freebsd.org" >
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