Re: panic: invalid bcd 194

On Sun, 2017-12-31 at 09:36 +0100, Matthias Apitz wrote:
> El día sábado, diciembre 30, 2017 a las 10:48:19p. m. +0100, Matthias Apitz escribió:
> 
> > 
> > El día sábado, diciembre 30, 2017 a las 11:11:54p. m. +0200, Konstantin Belousov escribió:
> > 
> > > 
> > > > 
> > > > > 
> > > > > > 
> > > > > > static inline u_char
> > > > > > bcd2bin(int bcd)
> > > > > > {
> > > > > > 
> > > > > >         KASSERT(bcd >= 0 && bcd < LIBKERN_LEN_BCD2BIN,
> > > > > >             ("invalid bcd %d", bcd));
> > > > > >         return (bcd2bin_data[bcd]);
> > > > > > }
> > > > > > 
> > 
> > > 
> > > For an immediate relief, enter the BIOS setup and set up the date.  Try to
> > > change it even if the BIOS date looks fine.
> > > 
> > > artc(4) should do more validation of the date read from CMOS, but this is
> > > a known issue.
> > The problem with this hardware (Acer C720 Chromebook) is, there is no
> > BIOS setup, only somekind of SeaBIOS w/o any setup. Btw: An older
> > CURRENT from an USB key r285885 boots fine.
> 
> I have got a hint about that the problem showed up already in March this
> year, even with some comment of mine in this thread:
> 
> http://freebsd.1045724.x6.nabble.com/panic-invalid-bcd-xxx-td6170480.html
> 
> In this tread is mentioned a patch as:
> 
> > 
> > cem_at_ posted this patch:
> > 
> > http://dpaste.com/1K2W05E
> > 
> > If someone can test it, I'll gladly commit it.  The real-time clock will
> > likely be wrong, but it won't panic with INVARIANTS.
> but the link is expired. Has got someone this patch? I checked the SVN
> for the file sys/sys/libkern.h there is no relevant change since March
> 2017. (cc'ed cem_at_)
> 
> I will let the C720 over night under power while sitting in the boot menu,
> maybe this will fix the RTC battery issue.
> 

Last time I worked on RTC stuff, cleaning this up got put on my "to-do
some day" list.  I think maybe that day has arrived.

-- Ian