English Community

ThinkPad NotebooksThinkPad: P and W Series Mobile Workstations
All Forum Topics
Options

32 Posts

01-08-2013

NO

44 Signins

789 Page Views

  • Posts: 32
  • Registered: ‎01-08-2013
  • Location: NO
  • Views: 789
  • Message 1 of 5

ThinkPad's in UltraDock with external displays sporadically black out

2018-01-24, 9:59 AM

Hi,

 

I've seen this for many years, on many different ThinkPad models and generations, on multiple variants of Windows (8, 8.1 and 10 for sure, and maybe 7, but its so long ago since we had any 7 machines that i cannot recall if the problem existed then).

 

External monitors on occation blacks out for a few seconds before re-appearing. It might happen multiple times within a minute, or once a week - so it is highly sporadic. I am currently running a P51, but my colleagues in my current department also experience this. They are on P51 and W550s. All my ThinkPads since 2011 have had this: T510, T520, T530, W540, and now, P51.

 

I'm on DisplayPort, and currently using daisy chain to connect 2 external displays (2x Dell U2515H), and my internal monitor disabled but the lid is open.

Reply
Options

5 Posts

05-25-2016

US

6 Signins

126 Page Views

  • Posts: 5
  • Registered: ‎05-25-2016
  • Location: US
  • Views: 126
  • Message 2 of 5

Re: ThinkPad's in UltraDock with external displays sporadically black out

2018-01-24, 18:49 PM

If you directly connect the monitors does it still occur?  Might be related to this https://forums.lenovo.com/t5/ThinkPad-P-and-W-Series-Mobile/P51s-external-monitor-random-shut-off/td-p/3768094

Reply
Options

32 Posts

01-08-2013

NO

44 Signins

789 Page Views

  • Posts: 32
  • Registered: ‎01-08-2013
  • Location: NO
  • Views: 789
  • Message 3 of 5

Re: ThinkPad's in UltraDock with external displays sporadically black out

2018-02-02, 14:53 PM

I now tried to connect both directly, and added a twist where one is connected via HDMI. Still the same..

 

Seems like we have somewhat the same issue as explained in your link.

Reply
Options

5 Posts

05-25-2016

US

6 Signins

126 Page Views

  • Posts: 5
  • Registered: ‎05-25-2016
  • Location: US
  • Views: 126
  • Message 4 of 5

Re: ThinkPad's in UltraDock with external displays sporadically black out

2018-02-02, 16:31 PM

We have seen it on all connection types.  The issue does go away if the laptop lid is closed.  So if you connect two external monitors and close the lid we didn't see the issue.  Also this has only been reported on 2 P51s laptops but not another 8 that have been deployed.  We are trying to see what the difference might be between them.

Reply
Options

32 Posts

01-08-2013

NO

44 Signins

789 Page Views

  • Posts: 32
  • Registered: ‎01-08-2013
  • Location: NO
  • Views: 789
  • Message 5 of 5

Re: ThinkPad's in UltraDock with external displays sporadically black out

2018-02-05, 7:58 AM

I tried to have the lid closed today, but it blinked again after 1 hour, so that's not a solution for me.

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete