[Bug 106297] cannot boot: machine check exception - kernel panic

[LGB [Gábor Lénárt]]

Public bug reported:

Binary package hint: linux-image-2.6-amd64-generic

Tried to boot my AMD64 box running daily upgraded feisty some hours ago
but it failed (note: it worked half a day ago), usplash bar stops at the
begining and keyboard leds start blinking. I've tried to boot with the
'nosplash' option and I get:

HARDWARE ERROR

CPU 0: Machine Check Exception:      4 Bank 4: b200000000070f0f
TSC fd94052f9
[...]

Sure, I've got some idea what MCE is, so I've run memtest86+ for a while
searching for memory error but not found. Also please note that this
machine runs AMD64 edition of Ubuntu for more than a year whichout any
hardware related problem. But the most important thing: booting with
older kernel works! Only 2.6.20-14-generic fails, -13-generic boots
without a single problem. I've tried several times: -14 failed with MCE,
-13 worked all the time. I've also try to compile kernel with '-j 32' to
give some work for the machine, but no crash or MCE got which may mean
hw stability problem or whatever.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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cannot boot: machine check exception - kernel panic
https://bugs.launchpad.net/bugs/106297
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