02-18-2014 10:52 AM
I have the dock labelled FRU P/N 04W3947 (Marketing PN 40A20135XX)
I have a 4K display port screen. It works fine at 4k when connected directly to the laptop's DP. When connected to either dock DP, it is detected by the laptop and the correct resolution is seen, but no image displays on the screen.
As mentioned in the subject, I have already applied the firmware update from Feb 10 (2.17) and ran it again to be sure it shows the updated firmware version.
Help! The whole reason I bought the new T440s and dock was to use the 4k display. There are several other people in the office where I work waiting on the outcome of fixing this before upgrading to the T440 and new dock.
02-19-2014 02:12 PM
Auhhh, I'm not alone. This is driving me nuts!
I have the ThinkPad Ultra Dock - 90W (PN 40A20090AU)
Am currently having to run my external monitor via the mini disply port on my laptop, as the doc port produces the same results as above. Oddly sometimes it will work, but only until I turn off the screen, unplug, or the monitors computer turns the displays off after inactivity. After that it can be days before it magically stats working again... for a short time.
Aditional symptons though not described by tmhardie, My external monitor is a dell U2711, with touch controls on the bezel. When it's plugged into the docking station the monitor controls freeze too... as in I can't change inputs, brightness etc. It's like the displayport on the docking station is putting out some wierd signal that's spazzing out my monitor. Never had this before from other computers.
Any advice or assistance would be greatly appreciated.
02-24-2014 02:09 PM
I found a workaround today. If I unplug my monitor power, then plug it back in, I can get my external monitor to work again. Very odd.
I would be interested to know if this works for you too.
02-25-2014 12:59 AM
02-25-2014 07:58 PM
Could you explain a bit more about your "4K" display port screen?
Lance and Xero seem to have issues with the Dell U2711 display. Is that the display you are running as well? If not, what model is your display?
02-26-2014 08:06 AM
Would you also see if there is a firmware update available for the Dell U2711? I'm told these are not 4K monitors and based on this discussion we are doing additional testing but have not reproduced the symptoms yet.
Some additional feedback to help isolate this may be helpful.
Which model display do you have?
02-26-2014 09:02 AM
I am also experiencing issues with the monitor blanking out after applying the 2.17 update. I have a T440s w/ pro-dock running with dual Samsung 2333SW monitors. After applying the dock firmware update, the problem went from happening 1x every hour to only happening 2x during an 8 hour day.
02-26-2014 10:21 AM - edited 02-26-2014 10:22 AM
I have a Seiki SE39UY04. It works fine connected to the mini displayport directly on the laptop, but when connected to the dock's display port (with the same cable with a displayport to mini displayport adapter) it doesn't ever display a signal, even though the laptop recognizes the screen and the correct 4k resolution.
I have also applied the latest firmware update to the 4k display just in case.
03-04-2014 09:45 AM
We have new Video drivers being released - the Windows 7 32 and 64 bit versions, and the Win 8.1 are up on the web now, and the Win 8 should be up soon.
Could you try the new drivers see if there is any difference.
Here is the 8.1 link http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS039513