Brightness control not working Windows 10 / Lenovo T450s

Hi, 

After the last Windows 10 update from 9th Oct 2018, my Lenovo T450s laptop is not capable anymore to adjust brightness. Hotkeys not working not the slide bar for Display Brightness. I can slide up or down but the screen does not change brightness level. I've tried all kind of solution after surfing the net, from updating video adapter drivers from intel and from lenovo as well, monitor drivers, changed FeatureTestControl registry key, but nothing works. 

Please help with other ideas.

Thanks,

Stefan

I would suggest that you uninstall the latest KB update and hide it so that it doesn't install it automatically and wait for new update to come which will be installed automatically.

To know which update got installed

Windows Key+I to invoke Settings > Update & Security > Click View installed update history

Make note of KB and uninstall and block it.

Uninstall
Windows Key + R > Type: appwiz.cpl > Enter > Click View installed updates > Select the required updates, right click, uninstall.

Block
Microsoft has provided a tool Show/Hide Updates tool to block the update
Download the tool from below link
http://download.microsoft.com/download/f/2/2/f2...
When you run this troubleshooter, it will search for available updates and list them
Select the update which you want to hide
Click Next and follow on-screen directions

Do let me know if you have any more question or require further help. If above didn't work, I will supply more troubleshooting steps to solve this problem.
Best regards
Vijay Verma

Timezone: UTC+05:30, PST+12:30
Availability Hours (UTC) : 05:00 AM - 05:00 PM

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Thanks for the quick response. 

Unfortunately I've uninstalled the last updates that were installed yesterday and today, blocked them, but still I have no brightness control.

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I would recommend that you restore from a system restore point to a point when things were working fine

https://support.microsoft.com/en-us/help/12415/...
Best regards
Vijay Verma

Timezone: UTC+05:30, PST+12:30
Availability Hours (UTC) : 05:00 AM - 05:00 PM

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I am also having this same problem -- any updates?

T450s refurbished

i5-5300 

Windows 10 Pro Version 1801 installed 1/3/2019 OS build 17134.112

All my issues are the same:

1) F5 and F6 keys do not adjust brightness. However, the keys themselves DO work. When FnLk is ON, they perform their programmed functions. For example, in Microsoft Edge, pressing F5 refreshes the page. F6 selects all text in the URL bar.

2) In Settings>System>Display there is no option to adjust brightness.

A few other things I tried. 

3) In Windows Mobility Center (search in the search box) there is a Display Brightness slider. When I adjust this slider, nothing happens. See screenshot.

4) I went to Device Manager>Display Adapters>Intel HD Graphics 5500>Update Driver>Search automatically for updated driver software. But my driver was up to date.

5) I tried Device Manager>Display Adapters>Intel HD Graphics 5500>Update Driver>Browse my computer for driver software>Let me pick from a list of available drivers on my computer>Microsoft Basic Display Adapter. This did not fix the problem.

6) I tried Device Manager>Monitors> Search automatically for updated driver software. Again, my driver was up to date.

7) I tried Device Manager>Monitors>Disable Device. Nothing happened (I expected my screen to stop working). For good measure, I enable the device again, but nothing changed. 

8) I clicked on Notification Center. There is no adjust brightness setting in there. The only display-related option is "Night Light", and that button is grayed out. 

I would try @Vijay-Verma's advice...

I would recommend that you restore from a system restore point to a point when things were working fine


... but this is a refurbished machine. It arrived to me like this this morning. 

And, yes, I called the refurbishing company. I talked to them for 45min trying the solutions above to no effect. They were just as stumped as I was.

Can anyone ANYONE help with this issue? Seems like a Microsoft Windows 10 issue or a Lenovo issue. 

Thank you!

UPDATE: I also tried updating my drivers through the Lenovo Vantage app. I updated 12 different ones, including HD Intel Graphics Driver V.20.19.15.5058. Still no fix.

Another fix that doesn't work: Rolling back the graphics driver. I don't remember the exact one I rolled it back to, it was something like 10.XX.XX.XX.XXXX. I also tried installing another driver (20.19.15.4331). No luck yet.

Lenovo recognized this problem back in Nov 2017 for ALL lenovos running on Windows, but none of the solutions work on mine. GRR. https://support.lenovo.com/jp/en/solutions/ht500157

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I'm in the same boat as Daniel Woldorff. I bought my T450s used and recovered/reinstalled windows. At first only the FnLk, Mute, and Volume Up/Down, or F- keys worked while nothing from Microphone Mute (at F4) to Open Start Menu (at F12) worked, except as a Fn key.

Right after reinstalling I downloaded windows updates and Lenovo Vantage and installed all the updates they pushed to me.

At one point I checked whether the Intel Display Driver was up to date, and it was. I kept troubleshooting and re-running the Lenovo HotKeys installer.

I then reinstalled the Intel Display Driver, and suddenly the special keys from Microphone Mute to whatever's on F12 worked - EXCEPT for brightness control on F5,F6. Still a problem.

I'd try a workaround of using a 3rd party remapping utility, but one (SharpKeys) seems to tell me the brightness keys don't register at all in Windows, so that won't work.

I might try Linux next.

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Just another tidbit that might help a guru diagnose this...

I installed a Windows Store app called "Monitorium". It's supposed to change the brightness of multiple connected monitors (including a laptop's own display). It happily changes the brightness of an attached external monitor. Interestingly, it doesn't seem to even *detect* the laptop screen.

The laptop screen doesn't appear in Control Panel\Hardware and Sound\Devices and Printers either.

HWiNFO yields this about the laptop's 1920x1080 screen (selected data):

Monitor Name:                                                                   BOE [Unknown Model: BOE0653]
Monitor Name (Manuf):                                                      NV14N43 [DELL P/N: 6J1Y3]

Monitor Hardware ID:                                                         Monitor\BOE0653

I didn't find any monitor driver for this, but I suspect that may be the problem.

For now: https://www.nelsonpires.com/software/dimmer/

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One more thing... I *can* change the brightness by going into the Intel HD Graphics Control Panel -> Color Settings. There I find settings for Brightness, Contrast, Gamma, among other things. Now if only I could figure out a shortcut to change that.

Even if I could though, it's not the same as what Monitorium does. High brightness via Monitorium looks good, whereas high brightness via Intel looks washed out. At least what I really wanted was to dim for night use, and this workaround is decently suitable for that.

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I had the issue of some hotkeys not working.

Tried

-Lenovo PM driver update

-audio drivers update

-keyboard drivers update

but no improvement.

 

What did it for me was the "Hotkey features integration drivers update for win10 64 bit" and all worked.

It is here:

https://pcsupport.lenovo.com/in/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-...

under Software & Utilities>Hotkey integration

 

After the install everything worked, but on digging further, found that "setapps" under C:\DRIVERS\HOTKEY\apps toggles the enabling and disabling of the hotkeys.

 

Also, good to check if the service TPHKLOAD, the hotkey loading client, was running (task manager>services)

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Last updated October 28, 2020 Views 9,428 Applies to: