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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, X220 i5, T420, X230 i5, T420s, MacbookPro, Dell Venue 11 Pro
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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.
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lenovo T430 i5 3320m, FHD, 8GB
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lenovo T520 i7 2760QM, FHD, 8GB



Enable 2 finger scroll on any Synaptics touchpads with registry: http://forum.thinkpads.com/viewtopic.php?f=2&t=122612

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

#4 Post by denjohan » Sun Jun 24, 2018 2:43 am

I don't get any black screen on my T420 but I'd like the scrolling mode to stick when I press the center button and then scroll with motion momentum using the touch pad (with one finger) or operating the red joy stick. This worked with the latest Synaptics drivers and earlier versions of Win10 but it stopped working after updating Windows. I got back this functionality by instead installing a PS/2-compatible driver but then the gestures are gone. Will try fiddling with the registry settings to see whether I can get back back this functionality even with the Synaptics driver.
ThinkPad T470s 2560x1440 LCD/Intel i7-7600U@2.8 GHz/20GB/Windows 10
ThinkPad T420 1600x900 LCD/Intel i5-2540M@2.6 GHz/8GB/Windows 10
ThinkPad x61s 1024x768 LCD/Intel Core2Duo L7500@1.60 GHz/4GB/Windows 10
ThinkPad x301 1400x900 LCD/Intel Core2Duo U9400@1.40 GHz/4GB/Windows 7

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

#5 Post by RealBlackStuff » Sun Jun 24, 2018 5:43 am

In Ultranav you can set what the middle-button does.
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