db39

We've had [another forum user](https://forum.tinypilotkvm.com/-748/update-8-month-update) asking for a similar feature (to save hot key combinations) so that they can quickly switch between machines using their 'chained' KVM.

Here's an example log of what happens when running into this issue: ```text Nov 14 15:51:20 raspberrypi systemd[1]: Stopping uStreamer - Lightweight, optimized video encoder... Nov 14 15:52:50 raspberrypi systemd[1]:...

After some experimentation, I found that using `--encoder cpu --format yuyv` would work when running as the default user (`pilot` in my case). But when using the `ustreamer` service, it...

@mtlynch - Sure! My current hypothesis is that there's an issue with `ustreamer`'s H.264 functionality when trying to use the `yuyv` format, causing `ustreamer` to hang (and the ustreamer service...

>It's surprising that it works under `pilot` but not under `ustreamer` but I guess pilot does have sudoer permissions, so maybe it's somehow elevating permissions somewhere. My understanding is that...

Quick update - using the right alt key on the on-screen keyboard works in this situation. The problem seems to be with Alt Graph from a physical keyboard.

After doing some debugging, I've found that the right alt modifier isn't being applied to the HID code when being written. For context, here's the debug output when using right...

Keycode doesn't show that any meta / modifier keys have been pressed either: 

>Out of curiosity, does this reproduce across browsers? Yeah, the behaviour is identical on both Firefox and Chrome (with TinyPilot and keycode.info).

It looks like this behavior is still causing issues for [users that rely on AltGr](https://forum.tinypilotkvm.com/-930/bad-keyboard-mapping-using-atlgr-on-a-french-keyboard). And it isn't only for specific languages - I believe any layout that uses `AltGr`...