02-20-2014 02:58 AM - edited 02-20-2014 02:58 AM
I just got me a W540 with docking. It is connected with two Samsung 24inc screens. They are connected with two display ports kables from the docking. I also have a wireless logitech mouse and keybord. And a Jabra headset connected.
I have reinstalled it with windows 8.1 And now I have a serious issue that both screens turns off randomly while I work. They go black for 15 sec. And then re-appear. It seems like the computer looses all USB connection also while this happens. I sometime get an error msg. saying that I connected a USB device that cant be recognized. But most of the time nothing happens.
All 3 of us at work who has a W540 has this issue. So it must be known by Lenovo. I have an ongoing case with the support. But dosnt look like we are getting anywhere. They gave me this to try: https://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T540p-T440p-T440s-X240-Solution-for-flicke...
And it looked very much like my issue. But it didnt help any of us.
We think it could be a driver issue with the USB or that the computer is swiching between the Intel and the Nvidia gfx card.
I think I have tried about everything, but can not figgure this one out. I have all the latest drivers from Lenovo installed. Tried to use a wired mouse and keyb. no change, tried with a DVI and Displayport to the screen. No change.
Here is a link to Lenovos System report on my W540
Can someone please help me figure this one out?
Solved! Go to Solution.
02-20-2014 06:37 AM
Have taken the laptop out of the docking. Connected one of the monitors to the laptop with a VGA cable direcly. And useing the screen on the laptop as a secound screen. It is a terrible setup. Connected the LAN cable, and wireless mouse and keyb. No flickering of the screens now. Does that show me that there is something wrong with the docking?
02-20-2014 10:57 PM
Yes I did. I was very carefull to do it correct. But did not help. And if I try to update it now, it says I have the latest firmware. My colleges tried to update the firmware too. Did not help them either.
02-21-2014 12:19 AM
I run multiple monitors including Samsung 24 inch, Wacom Cintiq, Wacom tablet and multiple mice at any time when connected to either of my two docking stations. I have had exactly the same problem when using the 135w power supply. However, the problems disappear with the 170W power supply
02-21-2014 12:31 AM
VERY interesting, have now changed powersupply. And testing as we speak.
What are lenovo thinking? Sending a low powered supply with the docking and a high powered supply with the computer? Should have been the oposite. Thanks for your tip!
02-21-2014 01:13 AM
02-24-2014 12:40 AM
Im sure, it was too little juice in the powersupply that followed with the docking station. I tried to take the laptop out of the docking station and just connect all the devices directly in the laptop. Bought a minidisplayport to DVI converter so I could use two screens. (One on VGA = (Horrible) and one on DVI) I still used the PSU from the docking. The laptop then dimmed the screen at random times on the laptop, telling me there was a problem with the powersupply, and was going into flight-mode or something. So it was obvious that it had to little power even without the docking. But still, I did not think about the solution that came out in this post. I didn’t know that there where different effect on the PSU's. It solved my problem changing PSU. Never had a blackout since.
05-30-2014 12:48 AM
Well, well, well!!!
This could be the solution to my problem here then!!
Once I get my hands on the PSU supplied with the laptop and verify it definitely is a 170w then I'll be swapping them out.
Lenovo really should buck up their game and send the correct PSU with the Docking Stations!