Here is the configuration:
Dell Precision M4600 laptop
- BIOS Version/Date Dell Inc. A13, 8/9/2012
- Windows 7 Professional, Version 6.1.7601 Service Pack 1 Build 7601
- Processor Intel(R) Core(TM) i7-2720QM CPU @ 2.20GHz, 2201 Mhz, 4 Core(s), 8 Logical Processor(s)
- 8 GB RAM
- 1920x1080 display
AMD (ATI) FirePro M5950 (FireGL) Mobility Pro Graphics
- BIOS Version 013.012.000.027
- BIOS Part Number BR041418-001
- Driver Packaging Version 13.251.1-131223a-167126C-Dell
Dell E-Port Plus PRO2X Docking Station
2 x Dell U2312HM DP 1920x1080 Displays
The docking station has dual display ports which I am using to connect the displays. The built-in display is 1920x1080 @ 60 Hz and 32 bit. The external displays are 1920x1080 @ 75 Hz and 32 bit. The displays are configured in extended mode, so all three are usable. The primary display is one of the U2312 displays.
When the computer boots up connected to the docking station, everything works perfectly. The power management is set to dim the displays after 10 minutes and turn them off after 15 minutes. Usually, when the displays turn off, one of them flickers after they turned back on. The flickering is random. Sometimes it stays off for a second or two before coming back on. I've seen the problem on both display ports. I can do several things to get it to stop flickering. I can reboot, which is a hassle. I can unplug the display port and replug it. I can use WINDOWS-P to disable extended mode for a few seconds, then re-enable it. Sometimes it takes a few times to get that to work. Then everything is stable again.
The docking station has been replaced. The mainboard and graphics adapter have been replaced. The operating system has been reinstalled. The only thing left is the driver.
Is this sufficient information?
03:40 PM by