Kubuntu/Ubuntu does not remove everything from memory at shutdown

Reinhold Rumberger rrumberger at web.de
Sat Mar 13 19:12:13 GMT 2010


On Saturday 13 March 2010, Mark Greenwood wrote:
> You're completely ignoring the information before you. You're not
> the only one, this is exactly the reason I gave up with my
> original bug report.
> 
> Let me see if I can explain it any more clearly. Perhaps something
> is being lost in translation.
> 
> With a choice of three OSs, the only combination that does not
> work is when I boot *from* Kubuntu into another.

I've kinda been replying to Steve and not you; for him the only 
combination that does not work is the Kubuntu->Win7, for which he is 
apparently using an unsupported driver.
IOW, this seems to be a different issue from yours, which is why I'm 
ignoring any info you gave while I'm concerning myself with *his* 
problem - it just doesn't apply. Also, this thread is kinda long and 
I can't keep everything in mind.

> The only common
> factor in every failing case is that I *start* in Kubuntu. How
> many more ways can I explain it? There is only one logical
> conclusion from this, and it is that Kubuntu is doing something
> different.
> 
> This is supported by the observable facts. When I reboot from
> Windows or Mandriva, my laptop does a proper restart - I see the
> BIOS POST screen and I get a little beep, like I do when I switch
> it on. When I reboot from Kubuntu, I never see the BIOS POST
> screen and I do not get the beep; Kubuntu goes directly from its
> shutdown screen to the Grub menu, and this clearly leaves the
> hardware in an unstable state because most of it doesn't work
> properly afterwards, in any OS.

OK, this seems *really* strange. For me, rebooting from Kubuntu 
passes the BIOS POST screen. I have no other OS installed to try out, 
but using a live OS like Knoppix has never caused me any problems, 
sound or otherwise.

> Do you now accept that Kubuntu is not resetting my hardware
> properly when I choose 'Restart Computer'.

I never doubted (or concerned myself with) your problem, so I can't 
really "come around"... ;-)
I just don't know enough to really be of any help.

> This only applies on my Sony laptop. My Acer laptop and my desktop
> reset properly. I know it could be a BIOS issue, but if it is
> then why does Mandriva work?

'Cause Sony uses a buggy ACPI table that Ubuntu can't handle? Have 
you ever tried disabling ACPI at the grub prompt? (I forget the 
option you need to add, but I'm sure you'll find it in google.)

Just out of curiosity, if you are in the grub menu after a cold boot 
and drop to its command prompt (using the 'c' key in the menu, IIRC) 
and you enter "reboot", does that result in passing the BIOS POST 
screen?

  --Reinhold
PS: please snip my sig when replying!



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