X31 external display won't come back after monitor sleep

[Terrahawk]

My X31 has had a strange issue lately, mostly to do with my relatively new 19in WSXGA+ LCD monitor. What happens, is that once the X31's display goes to sleep after 15 minutes (this is all on a Port Replicator II running on AC) the external monitor doesn't come back. The Thinkpad's own LCD works fine but if I have the external monitor on, it just gets a blank screen. I have tried unplugging the monitor connection and then putting it back but that doesn't work either. The monitor claims that it is getting a signal... it just happens to be a completely black one!

If I put the X31 to sleep and then bring it back up, everything works again. Has anyone had this issue?

[sjthinkpader]

Are you using Presentation Manager, which version? What is the Video driver version?

[Terrahawk]

Presentation Director 2.57
Display driver version 8.133.2.1.1.1-070206a-043154C

Presentation Manager does no good since the external display is the primary display, and I can't see the start menu, let alone the Fn+F7 selection window.

I don't think that there is a later version of the video driver on the Lenovo web site.

[astroidea]

I get this problem all the time with my X41T, only except without an external monitor and the main screen won't come back up.

[sjthinkpader]

You may want to set the default display device in BIOS to VGA port.

Regardless, I suggest you to update the PD to version 4.0 and above.