On Mon, 2011-09-05 at 21:08 +0200, Pascal BERNARD wrote: > Here is the result of dmesg from the initrd shell. "ls /dev/mapper" > shows that some logical volumes are not present. The final message of > dmesg is about a failure of vgchange. > > All this confirm that the lvm track is worth investigations.
The failure of vgchange is in kmalloc(), which suggests memory corruption. You also said "Sometimes, the kernel freezes several minutes after an apparently normal boot." initramfs-tools surely isn't responsible for that! I suspect a hardware problem (though a kernel bug could be responsible). There's an old but still somewhat relevant FAQ covering unexplained instability: <http://www.bitwizard.nl/sig11/>. The first thing to check would be RAM (memtest86+). Ben.
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