T420s / Win10 - using center button for scrolling results in black screen

T400/410/420 and T500/510/520 series specific matters only
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michbona
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T420s / Win10 - using center button for scrolling results in black screen

#1 Post by michbona » Mon Sep 04, 2017 10:27 am

Hi,
I am using Windows 10 (64bit) Pro on a 420s. I know it's not officially supoorted, but it works quite well.

What drives me insane is the following:
- I use the center button of the trackpad to scroll (in combination with the Trackpoint)
- every time I press the center button and release it (scrolling or not), the screen goes black
- the screen comes back after a while when I scroll or simple press the center button again.

Has anyone made a similar experience and tell me how to fix this. Scrolling with the center button is so ingrained in my habits, it's hard to "unlearn".

Any other form of scrolling ("left-click on scrollbar" or "two-finger trackpad") work just fine.

Thanks
Michael

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Re: T420s / Win10 - using center button for scrolling results in black screen

#2 Post by mpcook » Mon Sep 04, 2017 11:20 am

I never knew you could scroll this way. But on my T420s with Windows 10 (64bit) Pro, it works fine.
Current: 2 x W520 ET, 3 x X220 i7, T420, X230 i5, T420s, MacbookPro, Dell Venue 11 Pro
Past: IBM5150-8088 500 600E 600X T20 T21 5xT23 X30 3xX31 X32 T40 T42 3xT43 T43p SL510 T60p X60T X60s T61 2xT400 T410si T400s T500-3.06GHz X200 X201 X220i5 X220i7 2xT420s

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Re: T420s / Win10 - using center button for scrolling results in black screen

#3 Post by TPFanatic » Mon Sep 04, 2017 2:39 pm

Try reinstalling ultranav driver.

Reseating keyboard.

Or trying with another keyboard.
Daily driver: lenovo T500 P9700, WUXGA, 8GB
Ultraportable: IBM lenovo X60s
Home theater: lenovo T420

Enable advanced features on older Synaptics touchpads with the registry: http://forum.thinkpads.com/viewtopic.php?f=2&t=122612

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