My Dell Inspiron 1720 laptop runs Vista Home Premium (sigh).
I'd like to be able to put it into sleep (ACPI mode S3 or "sleep" which is invoked instantly) but instead
it always goes into S4 (ACPI mode S4 or "hibernate") taking up to a minute to update hiberfil.sys.
I could invoke S3 on my old Vaio under XP, so why not under Vista.
How can I set up the 1720 for S3, not S4 ?
Background stuff and what I have found :-
1. The Shutdown Menu
includes options, "sleep" and "hiberate".
BOTH options invoke hibernate (RAM copied to hiberfil.sys).
2 The Registry
The Registry contains about 14 references to S4 - eg
"REG_EXPAND_SZ \system32\powerprof.dll, -54, system hibernate sleep state (ACPI defined sleep state S4)"
but no references (that I find) to S3. I haven't messed with these entries as I don't know which to change or how.
3. The BIOS (A04 - I assume a Dell homebrew)
This contains no references to, or possible entries for, S3/S4 - sleep/hibernate.
4. The command line tool POWERCFG
Reports only S1 & S2 are not supported.
POWERCFG -H OFF does NOT disable hibernate, it only disables the functionkey invocation (Fn+F1)
>POWERCFG -DEVICEQUERY S3_SUPPORTED
>POWERCFG -DEVICEQUERY S4_SUPPORTED
These commands produce identical listings EXCEPT that S4_SUPPORTED includes the following line, which is not listed under S3_SUPPORTED
2Microsoft ACPI-Compliant System"
5. The control panel GUI "Power Options"
doesn't appear to contain any useful options
I'd like to be able to put it into sleep (ACPI mode S3 or "sleep" which is invoked instantly) but instead
it always goes into S4 (ACPI mode S4 or "hibernate") taking up to a minute to update hiberfil.sys.
I could invoke S3 on my old Vaio under XP, so why not under Vista.
How can I set up the 1720 for S3, not S4 ?
Background stuff and what I have found :-
1. The Shutdown Menu
includes options, "sleep" and "hiberate".
BOTH options invoke hibernate (RAM copied to hiberfil.sys).
2 The Registry
The Registry contains about 14 references to S4 - eg
"REG_EXPAND_SZ \system32\powerprof.dll, -54, system hibernate sleep state (ACPI defined sleep state S4)"
but no references (that I find) to S3. I haven't messed with these entries as I don't know which to change or how.
3. The BIOS (A04 - I assume a Dell homebrew)
This contains no references to, or possible entries for, S3/S4 - sleep/hibernate.
4. The command line tool POWERCFG
Reports only S1 & S2 are not supported.
POWERCFG -H OFF does NOT disable hibernate, it only disables the functionkey invocation (Fn+F1)
>POWERCFG -DEVICEQUERY S3_SUPPORTED
>POWERCFG -DEVICEQUERY S4_SUPPORTED
These commands produce identical listings EXCEPT that S4_SUPPORTED includes the following line, which is not listed under S3_SUPPORTED
2Microsoft ACPI-Compliant System"
5. The control panel GUI "Power Options"
doesn't appear to contain any useful options