shutdown restarts laptop

Colin Law clanlaw at
Tue Jul 26 20:35:37 UTC 2011

On 26 July 2011 21:12, Firesam <ubuntu at> wrote:
> On Tue, 2011-07-26 at 14:07 +0100, Colin Law wrote:
>> On 23 July 2011 09:44, Ben Tinner <bentinner at> wrote:
>> > On 21 July 2011 08:21, Firesam <ubuntu at> wrote:
>> >>
>> >> I am having a very strange (to me at least) problem with my laptop
>> >> computer. It took a while until I was able to replicate the exact
>> >> circumstances that caused it. Whenever I shutdown the laptop restarts
>> >> and does not power off. Just incase that is not annoying enough when it
>> >> restarts the internal kb and mouse are disabled. Interstingly enough mot
>> >> only that this is not caused by choosing restart (the kb/mouse thing)
>> >> but restart fixes it and re-enables the kb and mouse.
>> I don't know whether I can help, probably not, but just to clarify the
>> problem does the PC go through a re-boot cycle (showing BIOS startup
>> and so on) or does a shutdown attempt just have the same effect as a
>> logout, taking you back to the login screen without a full re-boot.
>> Colin
> It is a full reboot cycle. It is very annoying because sometimes it
> works fine. I don't know how to debug what causes it to not work but
> when it does it takes down the mouse and keyboard. The kb works in BIOS
> an
> d grub but when the os starts it is not working. this is from early on
> in the boot process because if I try to boot into rescue mode it can not
> select anything because the kb is not functional.

If it goes through a full reboot cycle then there should be no
difference from one boot to the next as not much should hang over from
one boot to the next.  I wonder if you have a hardware problem, though
the fact that they work in grub tends to suggest otherwise.  I think
you said earlier that if you ask it to reboot then it does.  If you do
this does everything work every time?



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