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128 Posts

10-22-2008

United Kingdom of Great Britain and Northern Ireland

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  • Message 1 of 5

Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-07-13, 19:08 PM

Hi all,


I have a pair of the Lenovo ThinkVision Pro2840m 4K monitors since about 4 days ago, and very unfortunately I am encountering a lot of issues which I will be posting in separate messages.


My configuration is as follows:


System: Lenovo ThinkStation S10 with BIOS ver. 2WKT47AUS
Graphics: NVIDIA GTX670 by POV with BIOS ver. 80.04.19.00.04
OS: Windows 7 Enterprise x64 ver. 6.1.7601
NVIDIA: Drivers 331.82 (but have same issue with 332.21/337.88/340.43)
ThinkVision Display: Microcode LN3.01 with display driver ver. 1.0.0.0 (10/09/2013) installed
Connection: Cable connected on the DisplayPort of the display and on the DisplayPort of the GPU with the included in the box DP-DP cable. No other displays are connected to the GPU other than the Pro2840m.

 

Issue: Screen resizes to 640x440 resolution when display enters Power Saving Mode on DisplayPort @60Hz
If the display is at its native 3840x2160 resolution at 60Hz (display menu info shows 133.3KHz / 60Hz) and enters into Power Saving Mode (set by windows as when to turn off display), when I wake the screen I hear twice the typical USB disconnect (NOT connect) sound by windows then the display power indicator goes from orange to green and when my desktop appears on the display, all my windows (except for those that were left maximised before entering sleep) have been resized to an area of approx. 640x440 at the top left corner of my desktop.

 

As a consequence of this I can not set windows to power down the monitor, else I constantly need to be repositioning and resizing all my windows every 20 min if I leave my desktop.

 

Now I know there are quite some topics on internet of users claiming this to be a windows problem not recognising what resolution to default on the simulated screen configuration, and how to edit the registry to fix it. But that is just simply not the case with this monitor. Because the suggested fix didn't work for me. If you change the resolution from 3840x2160@60Hz to 3840x2160@30Hz the issue doesn't happen. You could also set a DP 1.1 mode through the display menu to force the connection on the DisplayPort to drop down to 30Hz on the native resolution with the same effect, there too issue will be gone. Also when resuming the system from hibernation (if the display was not on sleep prior to hibernating) this issue doesn't occur.

 

I really would appreciate it if anyone else having this display can replicate or has this problem too. Maybe someone from Lenovo support can ask their colleagues to try this with a similar setup to verify the issue.


If I have any updates I will certainly post them here on the OP.

 

 

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128 Posts

10-22-2008

United Kingdom of Great Britain and Northern Ireland

241 Signins

2214 Page Views

  • Posts: 128
  • Registered: ‎10-22-2008
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 2214

Re: Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-09-05, 17:53 PM

UPDATE

 

2 Days ago I received my second pair of the Lenovo Pro2840m 4K monitors with a newer manufacturing date (21-06-2014) compared to the first pair (20-05-2014). It turns out that the new pair have very pleasantly a newer firmware running.

 

Microcode LN3.06 appears to have addressed the major issue of windows being resized when display enters Power Saving mode on DisplayPort @60Hz. I have tested and can confirm to all interested that when running LN3.06 the issue is no longer present if either the screen enters Power Saving mode nor if the screen is powered off and on manually.

 

I want to thank the dedicated hardware team behind the ThinkVision line, and I will proceed to obtain the new Microcode for my first pair of screens as well.

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128 Posts

10-22-2008

United Kingdom of Great Britain and Northern Ireland

241 Signins

2214 Page Views

  • Posts: 128
  • Registered: ‎10-22-2008
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 2214
  • Message 2 of 5

Re: Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-07-31, 6:12 AM

UPDATE

 

You can reproduce the issue in the following way as well:

 

  1. Set your screen resolution in windows to 3840x2160@60Hz and connect the screen through its DP to the GPU DP connector.
  2. Turn off the screen by tapping the power button twice.
  3. Turn on the screen and notice that all open windows have been resized to an approx. area of 640x440 at the top left corner of your windows desktop.

If during this process you had left some windows maximised which didn't resize, you just need to click the 'Restore Down' button of the window to see that they too have been resized to the above area.

 

Now change your screen resolution to 3840x2160@30Hz and follow the above procedure, you will note that the issue does not occur.

 

Knowing there are a number of active community users out there with this same monitor, it feels kind of dissapointing to see that after 17 days from the OP no one has taken half a minute of their time to test and see if they too are encountering this issue.

 

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3 Posts

08-01-2014

UK

6 Signins

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  • Message 3 of 5

Re: Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-08-02, 23:07 PM
I replicated steps 1,2,3, though I have the issue at 30hz also. System is NVIDIA K600, DisplayPort, Windows 8.
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128 Posts

10-22-2008

United Kingdom of Great Britain and Northern Ireland

241 Signins

2214 Page Views

  • Posts: 128
  • Registered: ‎10-22-2008
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 2214
  • Message 4 of 5

Re: Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-09-05, 17:53 PM

UPDATE

 

2 Days ago I received my second pair of the Lenovo Pro2840m 4K monitors with a newer manufacturing date (21-06-2014) compared to the first pair (20-05-2014). It turns out that the new pair have very pleasantly a newer firmware running.

 

Microcode LN3.06 appears to have addressed the major issue of windows being resized when display enters Power Saving mode on DisplayPort @60Hz. I have tested and can confirm to all interested that when running LN3.06 the issue is no longer present if either the screen enters Power Saving mode nor if the screen is powered off and on manually.

 

I want to thank the dedicated hardware team behind the ThinkVision line, and I will proceed to obtain the new Microcode for my first pair of screens as well.

0 person found this solution to be helpful.

This helped me too

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1 Posts

11-13-2014

new york

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  • Registered: ‎11-13-2014
  • Location: new york
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  • Message 5 of 5

Re: Lenovo ThinkVision Pro2840m 4K resizing windows on sleep

2014-11-13, 17:48 PM
how do i get the latest microcode and how do i update my monitor?
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