Re: [OLPC-AU] hwclock accuracy

2011-01-27 Thread Jerry Vonau
On Thu, 2011-01-27 at 15:30 +1100, James Cameron wrote: > On Wed, Jan 26, 2011 at 06:09:02PM -0600, Jerry Vonau wrote: > > That actually makes things worse, try installing ntpdate and run it with > > the stock /etc/adjtime file, now the real time clock is set to localtime > > as that is the first t

Re: [OLPC-AU] hwclock accuracy

2011-01-27 Thread Jerry Vonau
On Thu, 2011-01-27 at 09:01 -0500, Martin Langhoff wrote: > Very interesting. Strange. Unexpected. > > On Wed, Jan 26, 2011 at 11:30 PM, James Cameron wrote: > > Until these problems are fixed, please change your build; > > Could this be added to http://wiki.laptop.org/go/OS_Builder#Recipes ? I

Re: [OLPC-AU] hwclock accuracy

2011-01-27 Thread Martin Langhoff
Very interesting. Strange. Unexpected. On Wed, Jan 26, 2011 at 11:30 PM, James Cameron wrote: > Until these problems are fixed, please change your build; Could this be added to http://wiki.laptop.org/go/OS_Builder#Recipes ? cheers, m --  martin.langh...@gmail.com  mar...@laptop.org -- Softw

Re: [OLPC-AU] hwclock accuracy

2011-01-26 Thread Jerry Vonau
On Thu, 2011-01-27 at 15:30 +1100, James Cameron wrote: > On Wed, Jan 26, 2011 at 06:09:02PM -0600, Jerry Vonau wrote: > > That actually makes things worse, try installing ntpdate and run it with > > the stock /etc/adjtime file, now the real time clock is set to localtime > > as that is the first t

Re: [OLPC-AU] hwclock accuracy

2011-01-26 Thread James Cameron
On Wed, Jan 26, 2011 at 06:09:02PM -0600, Jerry Vonau wrote: > That actually makes things worse, try installing ntpdate and run it with > the stock /etc/adjtime file, now the real time clock is set to localtime > as that is the first time hwclock is run. > > http://osdir.com/ml/fedora-olpc-list/20

Re: [OLPC-AU] hwclock accuracy

2011-01-26 Thread Jerry Vonau
On Thu, 2011-01-20 at 14:40 -0500, Martin Langhoff wrote: > On Thu, Jan 20, 2011 at 8:02 AM, Sridhar Dhanapalan > wrote: > > We've actually disabled the /sbin/hwclock --systohc in our latest > > build (probably to be released tomorrow). > > If you are spinning your own build, ensure ntpdate is in

Re: hwclock accuracy

2011-01-20 Thread Martin Langhoff
On Thu, Jan 20, 2011 at 8:02 AM, Sridhar Dhanapalan wrote: > We've actually disabled the /sbin/hwclock --systohc in our latest > build (probably to be released tomorrow). If you are spinning your own build, ensure ntpdate is installed. That should help significantly. cheers, m --  martin.lan

Re: hwclock accuracy

2011-01-20 Thread Jerry Vonau
On Thu, 2011-01-20 at 02:15 -0800, Hal Murray wrote: > > What is the accuracy of the hwclock on XOs? Can we assume that it will keep > > good time over an XO's five-year lifespan? > > The ballpark for the hardware is 1 second per day. > > > We have some XO-1.5s that have their hwclocks off by 10-

Re: hwclock accuracy

2011-01-20 Thread Sridhar Dhanapalan
On 20 January 2011 21:15, Hal Murray wrote: > >> What is the accuracy of the hwclock on XOs? Can we assume that it will keep >> good time over an XO's five-year lifespan? > > The ballpark for the hardware is 1 second per day. > >> We have some XO-1.5s that have their hwclocks off by 10-20 minutes.

Re: hwclock accuracy

2011-01-20 Thread Hal Murray
> What is the accuracy of the hwclock on XOs? Can we assume that it will keep > good time over an XO's five-year lifespan? The ballpark for the hardware is 1 second per day. > We have some XO-1.5s that have their hwclocks off by 10-20 minutes. Would > this likely be due to a fault at the factory

Re: hwclock accuracy

2011-01-20 Thread James Cameron
On Thu, Jan 20, 2011 at 06:36:14PM +1100, Sridhar Dhanapalan wrote: > What is the accuracy of the hwclock on XOs? By accuracy I presume you mean stability over time, or the amount of error between the clock and actual time. If you mean something else, ignore the following explanation. The XO-1.5

hwclock accuracy

2011-01-19 Thread Sridhar Dhanapalan
What is the accuracy of the hwclock on XOs? Can we assume that it will keep good time over an XO's five-year lifespan? We have some XO-1.5s that have their hwclocks off by 10-20 minutes. Would this likely be due to a fault at the factory (e.g. not setting the time before shipping them), or did the