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Grigoriy
August 20th, 2016, 09:14 AM
Hello!
Yesterday I got the system warning from the Updater that there's an important security update, and I OKed it and post factum I realized that it was actually an automated kernel upgrade. I also keep on getting messages from the system that I can upgrade to 16.04, but I choose not to for now and one of the main reason is that I'm afraid that PHP7 (which is the default for 16.04) won't do any good to my Joomla script that is hosted on a LAMP stack. Not the Joomla itself, which is compatible with PHP7, but what comes with it together. I checked and I'm still on 14.04, PHP 5.5 which is good. Now there are my couple of questions, regarding the situation:
1) What's the advantages of running 14.04 specifically on a new kernel version?
2) Do I have systemd? I think I don't, but I'm not sure. But what I did notice is that now I don't have this boot issue that kinda corrected itself after the kernel upgrade. I mean, I used to have this annoying problem of system not booting properly the first time I turn on the PC. Only after the reboot, I used to get to the Ubuntu login screen. The first time the system used to be dropped into a BusyBox shell environment. So could there be a direct connection between boot process and the new kernel? Does a kernel upgrade can really change it? So far it looks like it, though I've only been booting the system a couple of time, so it might be too early to tell.

kansasnoob
August 20th, 2016, 02:49 PM
I also keep on getting messages from the system that I can upgrade to 16.04

You can safely disable that in Software & Updates. Under the Updates tab at the very bottom where it says Notify me of a new Ubuntu version just change that to Never:

270761

You will still receive an EOL warning in April 2019 when 14.04 (Trusty) stops receiving updates.


What's the advantages of running 14.04 specifically on a new kernel version?

None that I'm aware of compared to the original Trusty kernel and X-stack, but the purpose of LTS HWE is to enable support for newer hardware.

Those who installed Trusty using the 14.04.2, 14.04.3, and 14.04.4 images got the lts-utopic, lts-vivid. or lts-wily HWE stacks respectively which all reached HWE-EOL this month:

https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Kernel.2FSupport.A14.04.x_Ubunt u_Kernel_Support

https://wiki.ubuntu.com/1404_HWE_EOL

I prefer always using the first point release images (eg; 14.04.1 & 16.04.1) so I can avoid HWE-EOL altogether, so you may want to keep that in mind when you're installing Ubuntu in the future. It hasn't happened to me often but sometimes a new kernel will drop support for older hardware in the process of enabling support for newer hardware so I much prefer to stay on the original kernel series and just get security updates for that kernel series throughout the lifespan of a release.


Do I have systemd?

No, systemd (in it's entirety) was not introduced until 15.04:

https://wiki.ubuntu.com/SystemdForUpstartUsers


So could there be a direct connection between boot process and the new kernel?

Yes. I have one PC in home that fails to reboot properly with the 3.13 series kernel. Cold boot is fine but it hangs on reboot. Such errors are not at all uncommon.

Grigoriy
August 20th, 2016, 03:21 PM
I see. OK, thanks!