Ubuntu 12.04 changed itself to xubuntu and stopped working

[Bret Busby]

On 31/07/2015, Petter Adsen <petter at synth.no> wrote:
> On Fri, 31 Jul 2015 03:08:21 +0800
> Bret Busby <bret.busby at gmail.com> wrote:
>
>> On 31/07/2015, Petter Adsen <petter at synth.no> wrote:
>> > On Fri, 31 Jul 2015 01:22:44 +0800
>> > Bret Busby <bret.busby at gmail.com> wrote:

<snip>

>> > An idea of exactly what has hung would be very helpful to know where to
>> > go from here.
>> >
>>
>> How would I find what has hung?
>
> Well, my first suspects would be that either the X server or the video
> driver kernel module has died, or maybe lightdm. If the X server,
> there should be clues in /var/log/Xorg.0.log, if the kernel module
> then /var/log/dmesg and/or /var/log/kern.log would be a good place to
> start.
>
> Determining exactly what has happened would depend on what you find in
> those files. In Xorg.0.log errors will be marked (EE) and warnings
> (WW). Any error messages in dmesg are typically pretty obvious if you
> take a little time to look through them, paying special attention to
> anything that seems related to your GPU.
>
> If none of those seem to contain anything interesting, then look
> under /var/log/lightdm (if you are indeed running lightdm, I've got no
> idea what display manager 12.04 used by default). The files lightdm.log
> and x-0.log in that directory might be helpful.
>
> There are any number of things that could have gone wrong, but if the
> display is hung then these are the places where I would start.
>
> Petter
>

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-- 
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
 Chapter 28 of Book 1 of
 "The Hitchhiker's Guide to the Galaxy:
 A Trilogy In Four Parts",
 written by Douglas Adams,
 published by Pan Books, 1992

....................................................