kernel 4.4.0-108 / 16.04 LTS does not boot anymore

[NoOp]

On 01/11/2018 07:10 PM, Jonesy via ubuntu-users wrote:
> On Wed, 10 Jan 2018 12:22:41 -0800, NoOp wrote:
>> On 1/9/2018 11:42 PM, robert rottermann wrote:
>>> Hi there,
>>> 
>>> my good old pc  running 16.04 LTS Desktop got a an update today.
>>> 
>>> Now it does not boot any more.
>>> 
>>> it is a: Intel® Core™ i5-2500 CPU @ 3.30GHz × 4
>>> 
>>> The kernel it got is 4.4.0-108.
>>> 
>>> Fro this one it does not boot any more.
>>> 
>>> Kernel 4.4.0-104 boots fine.
>>> 
>>> Is there something I can do about this?
>>
>> See:
>> https://usn.ubuntu.com/usn/usn-3522-3/
>> "Details
>>
>> USN-3522-1 fixed a vulnerability in the Linux kernel to address
>> Meltdown (CVE-2017-5754). Unfortunately, that update introduced
>> a regression where a few systems failed to boot successfully. This
>> update fixes the problem."
>>
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1741934
>> Kernel trace with xenial 4.4 (4.4.0-108.131, Candidate kernels for PTI fix)
> 
> kernel 4.4.0-109 is available.  I installed it with apt update/upgrade
> yesterday and it fix the Non-Boot issue --- without removing any older 
> kernels - even the borked 4.4.0.108.
> 
> Jonesy
> 

Yes... that I what USN-3522-3 (that I provided a link for) stated:

<quote>
Details

USN-3522-1 fixed a vulnerability in the Linux kernel to address
Meltdown (CVE-2017-5754). Unfortunately, that update introduced
a regression where a few systems failed to boot successfully. This
update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative
execution and indirect branch prediction may allow unauthorized memory
reads via sidechannel attacks. This flaw is known as Meltdown. A local
attacker could use this to expose sensitive information, including
kernel memory.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.04 LTS:
    linux-image-generic 4.4.0.109.114
    linux-image-4.4.0-109-lowlatency 4.4.0-109.132
    linux-image-lowlatency 4.4.0.109.114
    linux-image-4.4.0-109-generic 4.4.0-109.132

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
</quote>