Failure of reboot after update

[Alan Dacey (grokit)]

Going by where the boot process stopped the problem may be your hard drive and not software. Could be your hardware too but let's rule out your hard drive first.
Open a terminal any paste the output of the following in your response:
	sudo smartctl --all /dev/sda
	If it complains about an ATA device behind a SAT layer then use the following:
		sudo smartctl -d sat --all /dev/sda

That will give an estimate of your disk's health. You then should run a long test, this will take a while, like 45 minutes to an hour and a half depending on the size of your disk. Smartctl will tell you how long it will take so after that time run the command above again and look for any changes.
Use the following command to run a long test:
	sudo smartctl --test=long /dev/sda

It is possible but unlikely that you'll need to enable smart logging on your disk. You'll know if you get no real output.
Use this command to start logging:
	smartctl --smart=on --offlineauto=on --saveauto=on /dev/sda

If the command 'smartctl' is not found you'll need to install the package first.
	sudo apt-get install smartmontools
You can install a graphical front end with the package gsmartcontrol but if smartctl complained about the layer stuff then you need to go to Options-->Preferences  and add "-d sat" (without quotes) in the "Smartctl parameters" box and rescan. 


On Tuesday, October 11, 2016 6:02:13 AM Jim Croft wrote:
> I am running Kubuntu 16.04 on a Toshiba Satellite E55t-A5320 series computer.
> 
> The last two updates, when prompted to reboot, I clicked on the prompt and the reboot failed. The computer froze on the initial Toshiba banner page which is supposed to allow access via F2 to Setup Utility or by F12 to Boot Manager. The first time this happened, I tried to boot from a thumb drive. The computer gave a <Boot Failed> message, but when I attempted a normal boot, it worked, and continued to work, through several reboots, for several days. However, the next time I updated, and clicked the reboot prompt, the reboot again failed, and the previous work-around did not work. The computer will not get beyond the Toshiba introductory banner described previously. Any recommendations? I am not very familiar with Kubuntu, and am only semi-literate on computers in general, so please put it in “baby talk”!
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