fixed this by adding
libata.force=noncq to the grub config. i totally forgot that i did that with
my first install. the laptop now boots in 7 seconds from the moment of the
ubuntu password boot screen, to the desktop. before that it took way over one
minute.
it works every time!
i also use the
christopher,
i now tried for several hours to update the bios.
the windows 7 repair disk didn't execute the bios exe.
i did several tries with freedos and read around the internet.
is it really essential to update the bios, the changelog is here:
What does it fix?
Update CPU micro code to fix
update:
the windows 7 x64 live usb worked after all. that unpacked bat worked.
after booting ubuntu again, it failed me with the first error again:
... alert! /dev/mapper/ubuntu-vg-root does not exist ...
several tries later, it finally boots, nothing changed.
here is what i (obviously now)
Public bug reported:
i was told to open a separate bug here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1003309
i posted here:
http://askubuntu.com/questions/398406/encrypted-13-10-will-not-reliably-boot
and here:
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