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SubjectRe: [BUG] 2.5.42+ reboot kills Dell Latitude keyboard
Is there a controller difference between the Inspiron 4100 and your
latitude?

Ron Henry

"the illiterate of the future are not those who can neither read
or write; but those who cannot learn, unlearn, and relearn..."

On 17 Oct 2002, Eric W. Biederman wrote:

> Mikael Pettersson <mikpe@csd.uu.se> writes:
>
> > Eric W. Biederman writes:
> > > Mikael Pettersson <mikpe@csd.uu.se> writes:
> > >
> > > > Dell Latitude CPi laptop. Boot 2.5.42 or .43, then reboot.
> > > > Shortly after the screen is blanked and the BIOS starts, it
> > > > prints a "keyboard error" message and requests an F1 or F2
> > > > response (continue or go into SETUP). Never happened with any
> > > > other kernel on that machine.
> > > >
> > > > Apparently the 2.5.42+ "let's shut everything down at reboot"
> > > > change
> > >
> > > There was no such change just a discussion of what the kernel
> > > has been doing since 2.5.8 or so.
> > >
> > > > put the keyboard controller in a state which is inconsistent
> > > > with the BIOS' expections at a warm boot.
> > >
> > > There is a bug in device_suspend. device_shutdown, and device_suspend
> > > where merged and the POWER_DOWN case now removes the drivers which
> > > is a bug. You may be getting hit with that.
> > >
> > > Eric Blade has posed a patch fixing that.
> >
> > I tried Eric Blade's patch
> > <http://marc.theaimsgroup.com/?l=linux-kernel&m=103477012517984&w=2>
> > but it didn't make any difference. Same keyboard error as before.
> >
> > So either the patch doesn't change what actions are taken on reboot,
>
> Correctly only what actions are taken before reboot, are changed.
>
> > or the keyboard (std SERIO_I8042 + ATKBD PC stuff) driver was also
> > broken in the 2.5.41->2.5.42 step.
>
> There is something in the ChangeLog about fixing the keyboard reboot
> case. I don't see where the code changes in the patch but the
> keyboard code was touched quite a bit.
>
> So I suspect the keyboard driver also does the wrong thing for
> you in this case.
>
> Eric
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