Kubuntu/Ubuntu does not remove everything from memory at shutdown
rrumberger at web.de
Fri Mar 12 01:31:03 UTC 2010
On Friday 12 March 2010, Steve Morris wrote:
> On 11/03/10 15:53, 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.
> This is definitely not a windows issue, it is an issue of Kubuntu
> not shutting down properly like other operating systems do. I am
> in the situation of having to boot into Mandriva and warm booting
> from there to cater for Kubuntus inadequacies.
You do know that Kubuntu and Mandriva are essentially the same
operating system (i.e. GNU/Linux)?
Also, please try to understand what is going on before wildly
throwing around accusations! Howard Coles did a nice job of
explaining what happens and why it happens - if you understood what
he said, I'd like to see your argument why he is wrong.
To roughly summarise his post: not cleaning and resetting every
device state is common practice both in the MS and the Linux world
and it's the OS' job to properly initialise the hardware during the
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