No mouse when connecting TinyPilot via AIMOS KVM
When my TinyPilot is connected directly to a PC it works fine, but if I try to connect it via an AIMOS KVM as described in the KVM compatibility list (i.e. combined with HDMI splitter) the keyboard works but the mouse does not, the pointer jiggles randomly across the screen.
I have a Voyager 2 with the latest firmware. The video on the Internet that illustrated the KVM setup was using the older version of the TinyPilot hardware, is this no longer supported in the new version?
- 16 replies
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- Diego @diego
Hello David! I'm sorry you are having this issue.
The AIMOS KVM handles power strangely, it draws power from HDMI. We have tested this device to work best when using a powered HDMI splitter.
The video on the Internet that illustrated the KVM setup was using the older version of the TinyPilot hardware, is this no longer supported in the new version?
The hardware used in the video and the Voyager 2 hardware can both support an AIMOS KVM, provided you use it with a powered HDMI splitter.
I was using a powered HDMI splitter, per the instructions in the video.
This one: OREI UltraHD 4K @ 60 Hz 1 X 2 HDMI Splitter 1 in 2 Out 2 Port 2: 8-Bit - HDMI 2.0, HDCP 2.0, 18 Gbps, EDID, Duplicate / Mirror 4K Screens - UHDS-102, includes 100-240 50/60 Hz auto-switching power supply.
- Diego @diego
@DAB42 - We have the AIMOS KVM, and we just tested it with a Voyager 2 and TinyPilot Pro 2.4.1, and everything worked as expected.
Here are some things you can try:
Try plugging the TinyPilot into one of the other USB inputs on the AIMOS, like Hub 1 or Hub 2 (on ours, every port worked, though).
Verify that no virtual drives are mounted (under System > Virtual Media)
If none of these work, then it’s possible that your AIMOS device may be defective.
The suggestion to try one of the USB hub connections worked, the mouse and keyboard are both working, thanks. However, the hotkeys are not (but the manual switch on the AIMOS does.)
The compatibility list on the Wiki indicates that they should, is there some workaround required?
I tried my physical/remote keyboard and the virtual one on the TinyPilot GUI. The keypresses are shown at the bottom right of the TinyPilot window but they don't appear to be passed to the AIMOS. Hotkey switching does work for a keyboard connected directly to the AIMOS.
- Diego @diego
Hi David! Can you confirm no virtual drives are mounted (under System > Virtual Media)? Other users have found this to be the reason of hotkeys not working.
- TIn reply toDAB42⬆:Tyler Ivanco @Tyleriv
This is a bit late, but I’ve had a similar problem. I have two AiMOS units. In my case, the mouse was erratic in motion when connected to the keyboard or mouse port using the new unit. It worked well when connected to the hub 1 or hub 2 port, however I lost hotkey port control. I noticed that the older AiMOS had a power led to the left of the port 1. I swapped the older AiMOS into the system and everything worked. The newer unit (without the power led) did not work properly. This eratic mouse behaviour was similar for both tinypilot and PiKVM using the new unit.
Hi @Tyleriv, sorry that your TinyPilot's mouse is misbehaving with your new AiMOS KVM.
Are the two AiMOS KVMs the same model, or are they different models? And do you have the model numbers for each AiMOS KVM? I can take a look at the user manual of the newer KVM to see if there's any info about its USB inputs and hotkey support.
the mouse was erratic in motion when connected to the keyboard or mouse port using the new unit. It worked well when connected to the hub 1 or hub 2 port, however I lost hotkey port control.
TinyPilot acts as a USB hub, which means that if you plug TinyPilot into a dedicated mouse / keyboard port on a KVM the keyboard and mouse functionality may not work as expected. It sounds like on this particular model, you need to use the Hub ports.
- Progresswith handling this problem
So in our tests, the AIMOS KVM worked perfectly, including hotkeys. That's why this device is in the KVM compatibility list.
- Do you get the same behavior on both USB hub ports?
- Are you able to use hotkey switching successfully if you plug a real keyboard into the USB hub port?
- Are you using the cables that you purchased from TinyPilot?
I tried both USB hub ports, same issue.
If I plug a real keyboard into either of the USB hub ports hotkey switching doesn't work. If I plug a real keyboard into the keyboard or mouse USB ports, hotkey switching works correctly.
I am using the cables that were supplied with the TinyPilot.
The guys at DBTech made a review of TinyPilot + splitter + AIMOS KVM about a year ago, and hotkeys worked for them. Check this video for details (NOTE: he is using a Voyager 1, but that shouldn't be a problem, just ignore that part -- you can see how he is plugging the TinyPilot USB DATA cable into the keyboard port of the AIMOS KVM).
Considering the following:
- Hotkeys do not work if you plug a real keyboard into any of the hub ports in the AIMOS KVM.
- Hotkeys work if you connect a real keyboard to the keyboard port in the AIMOS KVM.
- The video from DBTech shows they plugged the TinyPilot USB DATA cable into the keyboard port in the AIMOS KVM, and they show that the hotkeys do work.
I would say we should go ahead and try connecting the TinyPilot USB DATA cable to the keyboard port in the AIMOS KKVM, instead of a hub port. Can you try that for me, please?
Hi, this is becoming a circular discussion.
The YouTube video you reference, "Expand Your TinyPilot to Support MULTIPLE Devices" (https://www.youtube.com/watch?v=wBMGGnwWmqI) is the one that inspired me to try connecting the TinyPilot to a KVM. In fact, I purchased the same AIMOS KVM as is used in the video because it was shown to work successfully - albeit using an older version of the TinyPilot. I followed the steps in that video and connected the data cable of the TinyPilot to the USB keyboard port on the AIMOS.
When I plug the TinyPilot USB data cable into the keyboard port of the AIMOS KVM, the keyboard works correctly, but the mouse does not. Any attempt to move the mouse results in the mouse pointer "jiggling" around in the bottom-right corner of the screen, but not moving from that corner. Left and right mouse clicks work but mouse movement does not.
Note that I've also tried different mice on my remote "administration" PC that is connected to the same network as the TinyPilot (both hard wired via Ethernet to the same switch), Bluetooth mice, and ones physically connected to the admin PC via USB. I got the same results, the mouse pointer couldn't be controlled. I've also tested different PCs running Windows 10 and Windows 11, and two different HDMI splitters, the first one being a similar model to the one used in the video.
If I plug the TinyPilot USB data cable into either of the USB hub ports on the AIMOS KVM, then the mouse and keyboard function correctly, but the hotkeys do not.
As previously stated, when I plug a real keyboard into the keyboard or mouse ports of the AIMOS KVM, it is able to hotkey switch between PCs connected to the AIMOS.
I'll be trying a potential workaround to this issue, by plugging a wireless "keyboard injector" device into the USB keyboard port of the AIMOS KVM, which should enable me to remotely switch the AIMOS via WiFi. This would fix the problem, but I'm still curious as to why the TinyPilot can't do this - power, interference, code...?
Hello David - I apologize for the late reply. I also apologize for pointing to the video you had already seen.
So I believe hotkey switching is never going to work on any of the USB hub ports. You tried connecting a real keyboard to those ports and hotkey switching didn't work. I don't see how it is going to work with the TinyPilot if it didn't work with a real keyboard. In fact, I think the only ports able to initiate hotkey switching are the USB keyboard and USB mouse ports.
If you want to give it a try, I looked for an older version of
init-usb-gadget(the file TinyPilot uses with the settings to impersonate a keyboard and mouse). The DBTech guys published their video on May 4, 2021, so I looked for around that date. Let me know if this works for you. If it doesn't, I'm afraid I don't know what else to try.
The idea is to see if this old code (same as it was when it worked for the DBTech guys), works for you. You would need to connect the TinyPilot USB DATA cable into the AIMOS USB keyboard port, run the commands below, and see if the mouse is usable (and of course, if hotkey switching works).
PROCEDURE -> Just copy the below snippet into a terminal.
cd /opt/tinypilot-privileged/ && \ sudo mv init-usb-gadget init-usb-gadget.original && \ sudo wget https://raw.githubusercontent.com/tiny-pilot/ansible-role-tinypilot/e5ca542946efa0e97a67e1380d323dc77a0b9452/files/init-usb-gadget && \ sudo chmod +x init-usb-gadget && \ sudo reboot
FALLBACK -> If it doesn't work, please run the following snippet to revert the changes:
cd /opt/tinypilot-privileged/ && \ sudo mv init-usb-gadget.original init-usb-gadget && \ sudo chmod +x init-usb-gadget && \ sudo reboot
Applying these changes appears to have "bricked" my TinyPilot. I no longer have video output, even when connecting the TinyPilot directly to a single PC without using the AIMOS and HDMI splitter at all. I ran the fallback to reinstate the original init-usb-gadget but it didn't fix the problem.
Looks like I will have to reinstall the OS. I am still able to access the TinyPilot via ssh. I've tried several restarts.
Hi David - I'm very sorry, I missed one line in the snippets. I have updated the commands in my post above, for if you want to give it another go.
Although I'm not sure why you lost video capture (since nothing in the snippets touch anything related to video), I believe you should be able to fix your TinyPilot by doing:
cd /opt/tinypilot-privileged/ && \ sudo chmod +x init-usb-gadget && \ sudo reboot