Zero Key On Keyboard Not Working

[Nina Zahra]

Ijust got my Pi Zero and I am going through the setup process with the mouse which is working fine but then when I switch over to my keyboard it doesn't work at all. I am using an iPad wall adapter to power the pi and the USB converter that I added to my order of the Pi. What is causing the keyboard to not but the mouse is?

The USB port on the Pi Zero tends to supply less power than that of a full Pi--regardless of how you are powering the Pi Zero--so expect compatibility with fewer USB devices. One way to get around common USB power issues is to connect through an externally powered USB hub.

I recently purchased a Banana Pi M2 zero, and I can't seem to get the OTG port to work with any kind of operating system. I have tried all of the normal remedies like cable issues, power supply, etc. With no luck. I know Armbian is usually the best OS for these little boards, but I can't seem to get a keyboard or mouse to work with it. Although it boots up just fine. Any help would be greatly appreciated!

First, depending on your level of comfort with SBCs/BPi-M2-Zero/linux cli, pick your method to address the USB host mode (flashing an aforementioned image being the "easiest") and then boot your BPi-M2-Zero.

Fairly new users to the forums are only allowed to edit their posts for a short period of time. With time and created postings this time span will increase. Until then it is perfectly fine to create a fresh posting for adding information.

Ok, so I'm a little confused. Did Tomash build his own Armbian image and alter the specific lines or did he alter the code in an existing image. If it was the later, how would I go about doing that? Sorry, I'm kind of new at this. I'm also trying all of the different images in the Drive folder. Most of them when booting up say "Failed to start console-setup.service - Set console font and keymap. Does this have anything to do with my issue? Also, on some of the other images it says that it can't enumerate the USB device. At least it recongizes it, but it gets stuck in the loop of saying that the USB device cannot be enumerated. I tried other keyboards to see if anything would change, but nothing so far.

No. You don't need to build an image. You modify the DTB by editing the files on the micro-SD file system (you need to mount it/work as root from another linux system). But it should be the last option you try since you are "kind of new to this ...".

P.S. If your networking skills are good AND you have a USB-Ethernet adapter, you can use it instead of the keyboard and check your router for the IP lease issued to the USB-Ethernet MAC address, then you can SSH into the BPi-M2-Zero using that IP ...

As the overlay you are using seems ok, could you try creating your own custom image using I think there is a kernel patch that might be causing the conflict. Try editing patch/kernel/archive/sunxi-6.1/series.conf file to add a - (hyphen) at the start of the line that contains patches.megous/phy-allwinner-sun4i-usb-Add-support-for-usb_role_switch.patch. Then compile using ./compile.sh BOARD=orangepione BRANCH=current. For detailed instruction on setting up build environment and creating an image, see -Guide_Build-Preparation/

I bought a new Arduino MKR Zero which is generally promoted for playing sound from SD Card (SD card slot built-in on the board) but since the Microcontroller is SAMD21, I believe it supports keyboard emulation.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.

I uninstalled both the drivers, reboot and now, HID was working fine.

One issue, the HID was simply typing the contents of the code.txt file rather than executing it (I saw it typing GUI r... in notepad in Windows).

I just blacklisted intel_vbtn kernel module in /etc/modprobe.d/blacklist.conf and rebooted. Author mentioned that somehow intel_vbtn thinks my laptop is in tablet mode (WHAT?!) and disabled keyboard/touchpad.

To implement this, you can either create a new file in /etc/modprobe.d with the suffix .conf or use the main blacklist.conf file. The former may be preferable, since you can then just delete the file when it is no longer required (i.e. when the bug is fixed):

This seems to be libinput that receives a SW_TABLET_MODE event from one of the laptops input devices. I don't know why they disable the keyboard and touchpad when receiving that event, but I would guess it was to avoid button presses on laptops you can flip the screen all the way around so the keyboard/touchpad is underneath the touch screen.

However, some laptop models emit this event even when the keyboard is not flipped around. Dell Precision 5760 has an "Intel HID switches" input device which triggers this event when the laptop is moved. So every time I triggered the accelerometer the internal keyboard and touchpad stopped working for some time. Before it went back to laptop mode. This bug seems to have been [fixed a few weeks ago][1], so hopefully it gets rolled out in a stable release soon.

Others have suggested blacklisting intel_vbtn, but that didn't work for me. Probably because of a different driver in use. But I found a different workaround, which is a solution in libinput for this exact problem; register a quirk for the input device triggering tablet mode: ModelTabletModeSwitchUnreliable.

Mashing the three buttons all at once (as one does when in frustration) sometimes solves the issue temporarily. I'm using the digital keyboard viewer in the case that i need to use a "0", and the " " (directly to the left of Delete) key seems to constantly be orange.

The keyboard is made up of "layers" with one of them being a flexible plastic "circuit board" with conductive traces. The photo below shows a typical example of this (Disassembled keyboards from MacBooks aren't common so I used a PC keyboard - the technology is the same).

The bad news: Replacing the keyboard will require you (or a tech) to completely disassemble your MBA. This involves literally taking every single component out of your MBA. It's not a hard process, but rather a long and detailed process. Ifixit.com has an excellent step-by-step.

The key thing to understand here is that even if your keyboard has a 100 keys, there aren't 100 on/off switches with wires to your motherboard -- that would be too inefficient. Instead, characters have codes, and it is these codes which are sent through these wires, and the number of wires will be much smaller. (This is also why you can't press more than a few keys simultaneously)

Therefore it's possible that if one of these gets shorted for some reason, (spills being the most common) a particular set of keys would stop working as expected, while leaving the others unaffected. Sadly Apple doesn't repair keyboards, only replaces them. I had to give up a perfectly good Apple Keyboard for just 4 keys like you. In my case it was the left and right arrows, left command, and tilde.

Hi, I have a macbook pro late 2011. Yesterday, I was using as usual my macbook the whole day. So I went to bed and shut the system down usually. Today I've started the OSX up and the number keys on the keyboard were not working anymore... The weird thing is that the whole keyboard is currently working except the keys from 1-9 (even the Zero key is working as usual) and I have to use the virtual keyboard to type them...

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The way to test: Restart your computer, if possible disabling any startup applications. Open Illustrator FIRST. See if you still have the problem. If not, then slowly open new programs to see which one is "capturing keystrokes."

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