shutdown restarts laptop

[Firesam]

On Tue, 2011-07-26 at 14:07 +0100, Colin Law wrote:
> On 23 July 2011 09:44, Ben Tinner <bentinner at yahoo.com.sg> wrote:
> > On 21 July 2011 08:21, Firesam <ubuntu at e17th.com> 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 anybody has a clue whaat could be wrong please help.

thanks.