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Using Power Management on Windows XP's welcome screen
created by
lj
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idea
) by
lj
(6 mon)
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Thu Oct 31 2002 at 1:58:31
By
default
,
windows xp
's welcome screen (the screen which displays either the
logon
box or the
fast user switching
screen) is run with
power management
entirely disabled. Laptops will happily run in full power mode, even if they are running on batteries. Quite a sucky state of affairs.
Like in
windows 9x
, the
welcome screen
uses the registry of the
default user
, but unlike 9x, there's no way to logon as default (pressing
ESC
doesn't work anymore :) So, to set power management settings for the logon screen:
Log on as
administrator
1
, and set up power management as you see fit
(I recommend setting 'turn off monitor' to 1 minute, and 'turn off hard disk(s)' to 3 minutes if your system can handle it.
2
)
Each user's power management settings live in (HKEY_CURRENT_USER\Control Panel\PowerCfg). Open
regedit
to here, and export the whole key to a file.
Open the file in
notepad
, and replace every instance of '
HKEY_CURRENT_USER
\' with 'HKEY_USERS\.DEFAULT\'
Delete the key '
HKEY_USERS
\.DEFAULT\Control Panel\PowerCfg', and import the .reg file.
Reboot
.
The power management setting for default user only apply when no users are logged on. When one or more user is logged on, the welcome screen inheirits the configuration of the last logged-on user.
1 - only administrator has write access to the default user
registry hive
.
2 - Some can't - every time a hard disk spins back up, it generates an
ATAPI
error 9 (timeout), and after enough of these windows disables
bus mastering
for that drive. Ouch.
printable version
chaos
fast user switching
The page you are trying to view contains POSTDATA
You might as well kill yourself. You're already dead.
Windows XP
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Rorschach's Insanity and the Epistemology of The Watchmen
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reboot
Hkey_Users
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