[Bug 342166] [NEW] adjtimex broken on AMD64 / nForce chipset

[Andrew Stevens]

Public bug reported:

Binary package hint: adjtimex

The version of adjtimex in hardy universe appears to have a Bug making
it produce wildly inaccurate drift estimates on some mainboards.

For example:
root at mouldy:/home/as# adjtimex -c=10 -d
                                      --- current ---   -- suggested --
cmos time     system-cmos  error_ppm   tick      freq    tick      freq
1236933734       9.688040
1236933744       9.796719    10867.9  10000   5679872
1236933754       9.905411    10869.2  10000   5679872    9892   1142110
1236933764      10.014111    10870.0  10000   5679872    9892   1095235
1236933774      10.122804    10869.3  10000   5679872    9892   1137422
1236933783      10.231498    10869.4  10000   5679872    9892   1134297

where hwclock instead reckons

as at mouldy:~$ hwclock --show ;date
Fri 13 Mar 2009 09:52:07 CET  -0.721038 seconds
Fri Mar 13 09:52:07 CET 2009

The effect is, of course, that the a huge (erroneous) correction for the systemc clock is recorded causing
massive system clock drift massively after adjtimex installation.

Later revisions of adjtimex appear to include new options to fix this
issue.

See (for example)
http://groups.google.com/group/linux.debian.bugs.dist/browse_thread/thread/296ac353aede8ddb?fwc=1

** Affects: adjtimex (Ubuntu)
     Importance: Undecided
         Status: New

-- 
adjtimex broken on AMD64 / nForce chipset
https://bugs.launchpad.net/bugs/342166
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