[OLPC Engineering] [Techteam] New F14-arm build os21

[James Cameron]

On Fri, Dec 16, 2011 at 08:12:27PM +1100, Sridhar Dhanapalan wrote:
> On 31 August 2011 18:53, James Cameron <quozl at laptop.org> wrote:
> > On Thu, Jul 21, 2011 at 08:22:42AM +1000, James Cameron wrote:
> >> On Wed, Jul 20, 2011 at 06:40:55AM -0400, Martin Langhoff wrote:
> >> > Once they learn that a particular key combination "finishes" runin
> >> > earlier, accidents can happen with surprising frequency.
> >>
> >> How is the power button being prevented?
> >>
> >> If the problem is that an early termination is indistinguishable from a
> >> test success, why not change runin accordingly? ?I'm happy to do that if
> >> needed.
> >
> > I didn't get an answer to my question. ?This has come up ... Bert has
> > noticed that Ctrl-Alt-Erase doesn't work any more. ?#11202. ?The
> > installed base obviously got used to it. ?Withdrawing a useful feature,
> > even if undocumented, will cause an increase in support costs.
> >
> > So I've investigated the effect of Ctrl-Alt-Erase on runin.
> >
> > When manufacturing tag TS is set to RUNIN, runin-main will be run on
> > boot, which will start the X server and execute runin-tests within it.
> >
> > On normal successful completion, the preserve function in runin-tests
> > replaces /boot/olpc.fth with one that changes the TS tag to SHIP, in
> > inject-tags.
> >
> > When the X server is terminated by Ctrl-Alt-Erase, runin-tests aborts
> > immediately, and so the preserve function is not executed, and the
> > system is then rebooted. ?On the next boot, with TS still set to RUNIN,
> > the tests are restarted.
> >
> > The same thing happens with a battery removal or power button hold.
> >
> > So, when you say that this key combination "finishes" runin earlier, can
> > you explain your observations further?
> >
> > If this was the only justification for removing the feature, then I urge
> > you to reconsider, and restore the feature.
> 
> We're currently evaluating 11.3.0, and I recently discovered that
> Ctrl+Alt+Erase doesn't work on XO-1.5s.
> 
> This feature is used by teachers in the field, and by us in testing.
> Its removal is a regression for us.
> 
> I've updated #11202.

You need not block on this, you only need to configure the X server's
DontZap feature back to what it was before.

I think it should be restored for 11.3.1, but I'm a voice in the
wilderness on this one.

-- 
James Cameron
http://quozl.linux.org.au/