Kubuntu/Ubuntu does not remove everything from memory at shutdown

[Steve Morris]

On 13/03/10 06:17, Mark Greenwood wrote:
> On Thursday 11 Mar 2010 20:07:18 Knapp wrote:
>    
>> On Thu, Mar 11, 2010 at 8:09 PM, Mark Greenwood<fatgerman at ntlworld.com>  wrote:
>>      
>>> On Thursday 11 Mar 2010 04:53:21 Howard Coles Jr. wrote:
>>>        
>>>> On Wednesday 10 March 2010 03:48:35 pm Mark Greenwood wrote:
>>>>          
>>>>> Yes that's exactly what I'm suggesting. Those suggesting this is a Windows
>>>>> problem have missed the point and failed to understand the problem. The
>>>>> problem is that Kubuntu does not correctly shut down and clear
>>>>> memory/microcode/ACPI on a warm reboot. If the system has not been
>>>>> properly shut down then it is not the next OS's problem if hardware does
>>>>> not initialise correctly.
>>>>>
>>>>> Mark
>>>>>
>>>>>            
>>>> Here's the deal.  The BIOS clears and initializes the hardware to a certain
>>>> point upon boot up, and when the control is handed over to the OS after the
>>>> bootstrap is loaded, it's up to the starting OS to initialize, and load the
>>>> drivers for all detected devices.  Blaming Kubuntu because Windoze doesn't
>>>> load right has got to be the craziest thing I've heard around here in a LONG
>>>> time.
>>>>
>>>> Here's a point you don't get as well:  If you're "warm booting", you're by
>>>> nature NOT clearing all the code in all the adapters at the OS level, you're
>>>> just clearing and writing out the Hard Drive cache, killing all the apps
>>>> running, and kicking off a quick reboot via ACPI.  It's up to the BIOS of the
>>>> box, or the next OS startup at that point to reset all cards and memory.  That
>>>> kind of completely empty RAM and all other add-on cards would be a complete
>>>> cold boot, right?  Warm booting means I don't take the time to completely
>>>> clear and shut down the hardware, I just do a "refresh" boot, hence the name
>>>> "warm".
>>>>
>>>> I've been using Kubuntu for years now, and there have been times when I've had
>>>> to do a cold boot because drivers didn't load successfully, but I've never (on
>>>> many machines) heard of blaming OS3 because OS2 and/or OS1 didn't do their
>>>> shut down right.  I've always blamed the OS that was booting up for not
>>>> loading drivers or initializing cards.  I've also had to do full power off
>>>> reboots because warm boots don't completely empty RAM/microcode, etc on
>>>> different OSes (Linux, NetWare, OS/2, and Windows) so this is nothing new.
>>>> Sometimes to get new microcode/updates to load, or fully update drivers, you
>>>> had to do a full cold power off reboot, I just haven't run into that in a long
>>>> while.
>>>>          
>>> I'm sure that's all very relevant to something. But here's the deal.
>>>
>>> I have Windows Vista, Kubuntu, and Mandriva on my laptop.
>>>
>>> I can warm reboot from Windows into any of the 3 OS's I have installed.
>>> I can warm reboot from Mandriva into any of the 3 OS's I have installed.
>>> I cannot warm reboot from Kubuntu into any OS, including Kubuntu.
>>>
>>> You still trying to tell me this is Windows' problem?
>>>
>>> Mark
>>>        
>> PulseAudio has been causing me nothing but headaches. It might be the
>> source of your problem also and maybe this will let us file a good bug
>> against it!
>>
>> Try killing the sound (PulseAudio (I hate this program but it is
>> better than without it}) before log out and see if that fixes the
>> problem then report back here.
>> http://ubuntuforums.org/showthread.php?t=816159
>>
>> Take a look at these pages too.
>> https://wiki.ubuntu.com/PulseAudio
>> https://wiki.ubuntu.com/DebuggingSoundProblems/KarmicCaveats
>>
>>
>>      
> I'm not running Pulseaudio. It's the first thing I remove from any installation :-)
>
> Mark
>
>    
I have tried pkill pulseaudio before I shutdown and it has made no 
difference to the issue.

regards,
Steve

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