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Benjamin__
What's DOS?
Posts: 2
Registered: ‎09-09-2018
Location: US
Views: 19,421
Message 1 of 3

Fn Keys and Audio Keys not working after updates.

I am running a P70 20ERCTO1WW (Win 7 Pro SP1) sometime in the past month or so I have had an issue with the function row. (I ran a mix of Windows and Lenovo updates about that time.)

 

Symptoms:
Mute key does not illuminate the in key LED; but the system tray volume mixer does show mute and unmute.
Mic Key does not illuminate the in key LED.

Fn+F1 will mute the speakers and illuminate the LED in the Mute key across the keyboard.
Fn+F3 will increase volume and unmute a Fn+F1 Mute.
Vol+ Key will increase volume but not unmute a Fn+F1 Mute.

The in key LED were working on the Mute key and Mic key.


Are the Fn+F1-F4 are operating on a lower system or hardware level?
Are the Mute, Volume -/+, Mic keys on a higher OS level?

Fn+F5&F6 (display brightness) are working as expected.

Fn+F7 (Projector) no response
WinKey+X functions as expected.
Fn+F8 (Radio) no response
The Bluetooth radio with the Fn Key during the period of updates.
This is a problem because I haven't been able to re-enable the Bluetooth radio.

Fn+F9 (Config) no response
Fn+F10 (Search) no response
Fn+F11 (Task Switcher) no response
Fn+F12 (Task Switcher) no response

The missing LED makes it more difficult to maintain proper sound discipline.

Lenovo Update and Windows Update are current.

 

Any ideas?

Guru
Posts: 1,427
Registered: ‎07-21-2010
Location: US
Views: 19,389
Message 2 of 3

Re: Fn Keys and Audio Keys not working after updates.

You probably updated the power management driver.  Its affecting a lot of people.  Its affecting OSD and Fn keys.  See below post.  The solution is to ROLL back the power management driver. 

 

https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/Latest-Power-Management-Driver-Conflicts...

 


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 I do not work for, nor do I speak for Lenovo. I will not respond to unsolicited private messages. Questions belong in the forum so it may   help other forum members as well.
 T490, TP 25 Retro, X1 Yoga 3rd Gen, W510 850 EVO, A30p
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Benjamin__
What's DOS?
Posts: 2
Registered: ‎09-09-2018
Location: US
Views: 19,377
Message 3 of 3

Re: Fn Keys and Audio Keys not working after updates.

Thank you for your quick and accurate response.
It worked, Device Manager > System Devices > Lenovo PM Driver > Driver > Roll Back Driver > Restart.

I saw that post but thought that was a five year old post / issue and disregarded it as different era.
Thank you.

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