02-24-2011 06:35 PM
We have a fleet of M58 and T410s with L2251p monitors connected via Displayport. As we're rolling our OS over to Windows 7 x64 Enterprise we've begun to see an issue where the desktop and laptop machines are entering a sleep power state, the monitor follow suit, but when waking the machine the monitor needs to be power cycled to become useable again. This is not an issue on shutdowns or restarts only waking from sleep. We've also noted that connecting via VGA does not cause this issue, it seems to be related to Displayport.
03-21-2011 01:24 PM
We experienced the same problems with with the M90 and different Laptop Models. Updating the BIOS and the Intel Display drivers to the latest versions solved it.
03-31-2011 08:29 AM
10-12-2011 08:07 AM
Can you confirm this on multiple machines? I've just updated the latest drivers and BIOS for a X220. Still having the same issue.
22inch L2251p (widescreen) connected using DisplayPort (came with monitor) to X220 dock. Won't wake when goes into standby.