Ubuntu Server how to upgrade to 12.04.3 with kernel 3.8 from 12.04.2 with kernel 3.5?
It seemed I have seen some doc saying upgrade to kernel 3.8, but forget where the doc is.
So new a topic.
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The document you were looking for was probably the LTS Enablement Stacks article.
You don't necessarily have to wait for a LTS-point-release update to install the newer kernel from the latest non-LTS-release. The kernel is published in the LTS repository usually a few weeks or months (To the experts: Is there a specific release schedule I don't know about?) after the non-LTS is finally released and available via meta packages following this scheme:
linux-generic-lts-quantal linux-generic-lts-raring linux-generic-lts-saucy ...
or install the
linux-hwe-generic package to get the latest HWE kernel.
it stop on checking disk for errors
The VM may not really be stopped, try changing video adapter to VGA: http://blog.peacon.co.uk/ubuntu-13-04-kvm-vm-boot-hang/