OK, this is pretty interesting. I'd used the "/change monitor-timeout-ac" switch in pwercfg before, and figured it didn't work because after I'd made the change, the "Power Options" window would show that "sleep after"
had also changed to the value to which I'd changed "monitor-timeout-ac". It did this time too, but this time, I actually monitored what happened. The display went blank after two minutes, but the tablet did not sleep either
at 3 minutes (something else fishy here; why should Power Options window say "Never" sleep, and powercfg consistently say 3 minutes?), or for at least the next 30 minutes, as evidenced by recording a GPS string with timestamp while the display
was off. Unfortunately, rebooting the tablet restored the condition that the Power Options window actually shows....both the "display off" and "sleep after" are at two minutes, and I'm back to the tablet hitting the sack at
two minutes. So, I've still got to find a way to make this change stick to "display off" only, or, much better, make the Power Options window work properly and reliably.
Here's the powercfg readout after the change had been made, (yep, two minutes), but before rebooting. (a second read of powercfg showed the same information on at least on the display and sleep parameters after rebooting):
Power Scheme GUID: e26d8997-5311-49ea-acb9-03aad4d86f7d (meteo_t)
Subgroup GUID: fea3413e-7e05-4911-9a71-700331f1c294 (Settings belonging to no subgroup)
GUID Alias: SUB_NONE
Power Setting GUID: 0e796bdb-100d-47d6-a2d5-f7d2daa51f51 (Require a password on wakeup)
GUID Alias: CONSOLELOCK
Possible Setting Index: 000
Possible Setting Friendly Name: No
Possible Setting Index: 001
Possible Setting Friendly Name: Yes
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 0012ee47-9041-4b5d-9b77-535fba8b1442 (Hard disk)
GUID Alias: SUB_DISK
Power Setting GUID: 6738e2c4-e8a5-4a42-b16a-e040e769756e (Turn off hard disk after)
GUID Alias: DISKIDLE
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x0000001e
Current DC Power Setting Index: 0x0000001e
Subgroup GUID: 02f815b5-a5cf-4c84-bf20-649d1f75d3d8 (Internet Explorer)
Power Setting GUID: 4c793e7d-a264-42e1-87d3-7a0d2f523ccd (JavaScript Timer Frequency)
Possible Setting Index: 000
Possible Setting Friendly Name: Maximum Power Savings
Possible Setting Index: 001
Possible Setting Friendly Name: Maximum Performance
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 0d7dbae2-4294-402a-ba8e-26777e8488cd (Desktop background settings)
Power Setting GUID: 309dce9b-bef4-4119-9921-a851fb12f0f4 (Slide show)
Possible Setting Index: 000
Possible Setting Friendly Name: Available
Possible Setting Index: 001
Possible Setting Friendly Name: Paused
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Subgroup GUID: 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 (Wireless Adapter Settings)
Power Setting GUID: 12bbebe6-58d6-4636-95bb-3217ef867c1a (Power Saving Mode)
Possible Setting Index: 000
Possible Setting Friendly Name: Maximum Performance
Possible Setting Index: 001
Possible Setting Friendly Name: Low Power Saving
Possible Setting Index: 002
Possible Setting Friendly Name: Medium Power Saving
Possible Setting Index: 003
Possible Setting Friendly Name: Maximum Power Saving
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000002
Subgroup GUID: 238c9fa8-0aad-41ed-83f4-97be242c8f20 (Sleep)
GUID Alias: SUB_SLEEP
Power Setting GUID: 29f6c1db-86da-48c5-9fdb-f2b67b1f44da (Sleep after)
GUID Alias: STANDBYIDLE
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x000000b4
Current DC Power Setting Index: 0x00000384
Power Setting GUID: 94ac6d29-73ce-41a6-809f-6363ba21b47e (Allow hybrid sleep)
GUID Alias: HYBRIDSLEEP
Possible Setting Index: 000
Possible Setting Friendly Name: Off
Possible Setting Index: 001
Possible Setting Friendly Name: On
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Power Setting GUID: 9d7815a6-7ee4-497e-8888-515a05f02364 (Hibernate after)
GUID Alias: HIBERNATEIDLE
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Power Setting GUID: bd3b718a-0680-4d9d-8ab2-e1d2b4ac806d (Allow wake timers)
GUID Alias: RTCWAKE
Possible Setting Index: 000
Possible Setting Friendly Name: Disable
Possible Setting Index: 001
Possible Setting Friendly Name: Enable
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 2a737441-1930-4402-8d77-b2bebba308a3 (USB settings)
Power Setting GUID: 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 (USB selective suspend setting)
Possible Setting Index: 000
Possible Setting Friendly Name: Disabled
Possible Setting Index: 001
Possible Setting Friendly Name: Enabled
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Subgroup GUID: 2e601130-5351-4d9d-8e04-252966bad054 (Idle Resiliency)
GUID Alias: SUB_IR
Subgroup GUID: 48df9d60-4f68-11dc-8314-0800200c9a66 (Intel(R) Dynamic Platform & Thermal Framework Settings)
Power Setting GUID: 07029cd8-4664-4698-95d8-43b2e9666596 (Config TDP Level)
Possible Setting Index: 000
Possible Setting Friendly Name: High TDP
Possible Setting Index: 001
Possible Setting Friendly Name: Nominal TDP
Possible Setting Index: 002
Possible Setting Friendly Name: Low TDP
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Power Setting GUID: 4a44b800-4f72-11dc-8314-0800200c9a66 (Power Limit)
Minimum Possible Setting: 0x00000001
Maximum Possible Setting: 0x00000005
Possible Settings increment: 0x00000001
Possible Settings units: Level
Current AC Power Setting Index: 0x00000003
Current DC Power Setting Index: 0x00000003
Power Setting GUID: 63c39116-4f72-11dc-8314-0800200c9a66 (Acoustics Limit)
Minimum Possible Setting: 0x00000001
Maximum Possible Setting: 0x00000005
Possible Settings increment: 0x00000001
Possible Settings units: Level
Current AC Power Setting Index: 0x00000003
Current DC Power Setting Index: 0x00000003
Power Setting GUID: b29c73e0-1a8b-46fd-b4ae-1ce5a3d6d871 (Low Power Mode Setting)
Possible Setting Index: 000
Possible Setting Friendly Name: Disable
Possible Setting Index: 001
Possible Setting Friendly Name: Enable
Possible Setting Index: 002
Possible Setting Friendly Name: Application Specific
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 4f971e89-eebd-4455-a8de-9e59040e7347 (Power buttons and lid)
GUID Alias: SUB_BUTTONS
Power Setting GUID: 5ca83367-6e45-459f-a27b-476b1d01c936 (Lid close action)
GUID Alias: LIDACTION
Possible Setting Index: 000
Possible Setting Friendly Name: Do nothing
Possible Setting Index: 001
Possible Setting Friendly Name: Sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 003
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Power Setting GUID: 7648efa3-dd9c-4e3e-b566-50f929386280 (Power button action)
GUID Alias: PBUTTONACTION
Possible Setting Index: 000
Possible Setting Friendly Name: Do nothing
Possible Setting Index: 001
Possible Setting Friendly Name: Sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 003
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000003
Current DC Power Setting Index: 0x00000003
Power Setting GUID: 96996bc0-ad50-47ec-923b-6f41874dd9eb (Sleep button action)
GUID Alias: SBUTTONACTION
Possible Setting Index: 000
Possible Setting Friendly Name: Do nothing
Possible Setting Index: 001
Possible Setting Friendly Name: Sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 003
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Power Setting GUID: a7066653-8d6c-40a8-910e-a1f54b84c7e5 (Start menu power button)
GUID Alias: UIBUTTON_ACTION
Possible Setting Index: 000
Possible Setting Friendly Name: Sleep
Possible Setting Index: 001
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 002
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 501a4d13-42af-4429-9fd1-a8218c268e20 (PCI Express)
GUID Alias: SUB_PCIEXPRESS
Power Setting GUID: ee12f906-d277-404b-b6da-e5fa1a576df5 (Link State Power Management)
GUID Alias: ASPM
Possible Setting Index: 000
Possible Setting Friendly Name: Off
Possible Setting Index: 001
Possible Setting Friendly Name: Moderate power savings
Possible Setting Index: 002
Possible Setting Friendly Name: Maximum power savings
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000002
Subgroup GUID: 54533251-82be-4824-96c1-47b60b740d00 (Processor power management)
GUID Alias: SUB_PROCESSOR
Power Setting GUID: 893dee8e-2bef-41e0-89c6-b55d0929964c (Minimum processor state)
GUID Alias: PROCTHROTTLEMIN
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000014
Current DC Power Setting Index: 0x00000014
Power Setting GUID: 94d3a615-a899-4ac5-ae2b-e4d8f634367f (System cooling policy)
GUID Alias: SYSCOOLPOL
Possible Setting Index: 000
Possible Setting Friendly Name: Passive
Possible Setting Index: 001
Possible Setting Friendly Name: Active
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000000
Power Setting GUID: bc5038f7-23e0-4960-96da-33abaf5935ec (Maximum processor state)
GUID Alias: PROCTHROTTLEMAX
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000064
Current DC Power Setting Index: 0x00000064
Subgroup GUID: 7516b95f-f776-4464-8c53-06167f40cc99 (Display)
GUID Alias: SUB_VIDEO
Power Setting GUID: 17aaa29b-8b43-4b94-aafe-35f64daaf1ee (Dim display after)
GUID Alias: VIDEODIM
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x0000003c
Current DC Power Setting Index: 0x00000078
Power Setting GUID: 3c0bc021-c8a8-4e07-a973-6b14cbcb2b7e (Turn off display after)
GUID Alias: VIDEOIDLE
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x00000078
Current DC Power Setting Index: 0x00000000
Power Setting GUID: 8ec4b3a5-6868-48c2-be75-4f3044be88a7 (Console lock display off timeout)
GUID Alias: VIDEOCONLOCK
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0xffffffff
Possible Settings increment: 0x00000001
Possible Settings units: Seconds
Current AC Power Setting Index: 0x0000003c
Current DC Power Setting Index: 0x0000001e
Power Setting GUID: aded5e82-b909-4619-9949-f5d71dac0bcb (Display brightness)
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x0000003c
Current DC Power Setting Index: 0x00000028
Power Setting GUID: f1fbfde2-a960-4165-9f88-50667911ce96 (Dimmed display brightness)
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000001
Power Setting GUID: fbd9aa66-9553-4097-ba44-ed6e9d65eab8 (Enable adaptive brightness)
GUID Alias: ADAPTBRIGHT
Possible Setting Index: 000
Possible Setting Friendly Name: Off
Possible Setting Index: 001
Possible Setting Friendly Name: On
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Subgroup GUID: 8619b916-e004-4dd8-9b66-dae86f806698 (Presence Aware Power Behavior)
GUID Alias: SUB_PRESENCE
Subgroup GUID: 9596fb26-9850-41fd-ac3e-f7c3c00afd4b (Multimedia settings)
Power Setting GUID: 03680956-93bc-4294-bba6-4e0f09bb717f (When sharing media)
Possible Setting Index: 000
Possible Setting Friendly Name: Allow the computer to sleep
Possible Setting Index: 001
Possible Setting Friendly Name: Prevent idling to sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Allow the computer to enter Away Mode
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000000
Power Setting GUID: 34c7b99f-9a6d-4b3c-8dc7-b6693b78cef4 (When playing video)
Possible Setting Index: 000
Possible Setting Friendly Name: Optimize video quality
Possible Setting Index: 001
Possible Setting Friendly Name: Balanced
Possible Setting Index: 002
Possible Setting Friendly Name: Optimize power savings
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000001
Subgroup GUID: e73a048d-bf27-4f12-9731-8b2076e8891f (Battery)
GUID Alias: SUB_BATTERY
Power Setting GUID: 637ea02f-bbcb-4015-8e2c-a1c7b9c0b546 (Critical battery action)
GUID Alias: BATACTIONCRIT
Possible Setting Index: 000
Possible Setting Friendly Name: Do nothing
Possible Setting Index: 001
Possible Setting Friendly Name: Sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 003
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000002
Power Setting GUID: 8183ba9a-e910-48da-8769-14ae6dc1170a (Low battery level)
GUID Alias: BATLEVELLOW
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000006
Current DC Power Setting Index: 0x00000006
Power Setting GUID: 9a66d8d7-4ff7-4ef9-b5a2-5a326ca2a469 (Critical battery level)
GUID Alias: BATLEVELCRIT
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000002
Current DC Power Setting Index: 0x00000002
Power Setting GUID: bcded951-187b-4d05-bccc-f7e51960c258 (Low battery notification)
GUID Alias: BATFLAGSLOW
Possible Setting Index: 000
Possible Setting Friendly Name: Off
Possible Setting Index: 001
Possible Setting Friendly Name: On
Current AC Power Setting Index: 0x00000001
Current DC Power Setting Index: 0x00000001
Power Setting GUID: d8742dcb-3e6a-4b3c-b3fe-374623cdcf06 (Low battery action)
GUID Alias: BATACTIONLOW
Possible Setting Index: 000
Possible Setting Friendly Name: Do nothing
Possible Setting Index: 001
Possible Setting Friendly Name: Sleep
Possible Setting Index: 002
Possible Setting Friendly Name: Hibernate
Possible Setting Index: 003
Possible Setting Friendly Name: Shut down
Current AC Power Setting Index: 0x00000000
Current DC Power Setting Index: 0x00000000
Power Setting GUID: f3c5027d-cd16-4930-aa6b-90db844a8f00 (Reserve battery level)
Minimum Possible Setting: 0x00000000
Maximum Possible Setting: 0x00000064
Possible Settings increment: 0x00000001
Possible Settings units: %
Current AC Power Setting Index: 0x00000004
Current DC Power Setting Index: 0x00000004
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Edited by
nhp_dfo
Friday, February 08, 2013 8:11 PM