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Windows 7: Power Settings: Issues handling HDMI-attached Monitors??

15 Dec 2011   #1

Windows XP Pro SP3, Windows 7 Pro 32-bit, Windows 7 Ultimate 64bit, Windows XP Home SP3
Power Settings: Issues handling HDMI-attached Monitors??

Friends I'm trying to sort issues with Power Policy handling of HDMI attached LCD on my Thinkpad x120e, running Windows 7 Home Premium x64. OS is up to date and performing well except for these issues. I have somewhat different policy rules set for 'Plugged In" vs Battery. I don't know whether the issues are related to the particular monitor, to the Lenovo power-management drivers, to Windows 7 ??

also I could not determine on sevenforums which folder to put this in...

1. The display-switch setting does not persist. That is, when plugged in, I set the display using the Fn-F7 switch, it works fine as long as system up, but after shutdown/reboot the display setting is lost. On other systems I had set this way it would persist.

2. In terms of routing power to the Monitor, my policy settings are almost identical, Battery Power vs. AC: Dim display after 10 min, turn off display after 20 min idle. The behaviour is a tad erratic: when attached to HDMI monitor it never dims, and it shuts off the monitor at odd times.... sometimes 30+ min, sometimes 'on time'.

3. Sleep Mode: in "put to sleep" mode plugged-in to AC power, upon resumption/wakeup, the monitor is lost. It reverts to onboard display and requires intervention to switch back to external mon.

I did not see any errors in the system log that relate to these issues.

all help will be warmly received!


My System SpecsSystem Spec


 Power Settings: Issues handling HDMI-attached Monitors??

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