Aspire TC-1785tested with another KB and it works fine but original keyboard does not work properly

I have a new Acer Aspire TC-1785 (Windows 11) that came supplied with an Acer bluetooth keyboard and mouse. The keyboard does not work properly. There is frequently a delay between pressing a key and it registering on the screen. When the character appears on the screen, it is frequently repeated even though the key was pressed once only. I have tried playing with the settings in the accessibility section, but cannot solve this. The problem is intermittent and varies in intensity. I gave up on it and connected the 9 year old bluetooth keyboard and mouse that came with my old Acer Aspire, which works perfectly, but I am annoyed that I cannot use the new one and want to solve the problem.

[Edited the thread to add issue detail]

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Larryodie

Maybe bad/weak batteries ???

JonBlund

The bluetooth and wifi are connected to the second M.2 slot on the motherboard. In the middle of a metal box that is. Faraday cage effect.

Then you add:

Bluetooth Low Energy (BLE)
Sniff Mode / Low Power Mode
Adaptive Frequency Hopping (AFH) (to avoid interference from wifi)

Then you can add some other default power saving options as well.

Older pre 4.0 bluetooth have none of these "features", so your 9 year old bluetooth keyboard and mouse will work just fine.

Another possible reason can of course be a keyboard fault. :-)

Larryodie

Possibly the driver needs to be updated ???

JonBlund

https://community.acer.com/en/discussion/comment/1323592#Comment_1323592

Windows update will automatically install the correct drivers for the device and keep them updated.

Zouch

It's not the batteries, which are the new ones that came with the new computer.

It's not the driver. All updates have been installed and I have even tried reinstalling Windows.

As to the interesting Faraday cage etc suggestions, why would Acer supply a keyboard that doesn't work for these reasons?

This was not the only problem with this PC. I bought a new HP printer with it, which the PC only recognised intermittently. I wasted hours troubleshooting this, including nearly 2 hours on calls to HP support, who concluded that the fault was with the PC, rightly I think, as it worked with my Macbook and Android devices. After reinstalling Windows 11 repair version, I finally got it working myself. I found the Microsoft support system utterly useless. The keyboard problem has persisted throughout all of this. I bought the PC and printer to mirror my previous pairing that gave me 9 years of reliable service.

JonBlund

-As to the interesting Faraday cage etc suggestions, why would Acer supply a keyboard that doesn't work for these reasons?

Most devices will work. Both for bluetooth and wifi.

Bluetooth operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, which spans from 2.400 GHz to 2.4835 GHz. This frequency range is divided into 79 channels, each with a bandwidth of 1 MHz, though there are also variations for different Bluetooth versions and technologies (such as Bluetooth Low Energy or Bluetooth 5.x).

Here’s a breakdown:

2.400 GHz to 2.4835 GHz: The entire Bluetooth spectrum.
79 channels: For classic Bluetooth (each 1 MHz wide).
40 channels: For Bluetooth Low Energy (with each channel also 2 MHz wide, but some are reserved for specific purposes like advertising and data exchange).

This frequency range is shared with other devices like Wi-Fi, microwave ovens, and other ISM devices, which is why Bluetooth can sometimes experience interference from other signals in this range.

In your case? A bad place for your cabinet? Bad luck? Some sort of 2.4 or 4.8 GHz source of noise nearby? The keyboard can still have some sort of defect. Test another 5.0 bluetooth low power keyboard just to rule that possibility out.

As for the use of the M.2 connection for wireless and bluetooth: Easy, cost effective, works good enough most of the time. Mine works just fine, but I would rather have two M.2 slots dedicated for SSD-disks. Now I am stuck with just one and the disk is only 500 GB. The speed is of course fantastic. 6 Gbit/s sata ssd is good, but not in the same league.

PS: Try changing your wifi channel on your router if you use the onbord wifi 2.4 GHz. You might get lucky.

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