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Leyden Jar loses power when Computer sleeps
Posted: 08 Jun 2025, 10:28
by memm74
Hello, I have a new Model F122. When my computer (Lenovo, Windows 11) is put to sleep it seems to shut down power for the Leyden Jar controller (Num Lock LED turns off). I then cannot wake the PC with the keyboard. If I wake it using other means the F122 stays off, the only way to use it again is to unplug and to replug. I checked settings in the Device Manager and don't see any issues. Other keyboards don't have this issue.
Has anyone come across this and has advice for me?
Re: Leyden Jar loses power when Computer sleeps
Posted: 08 Jun 2025, 17:25
by Falkenroth
My Unicomp Mini M was doing the same thing a few years ago but I thought that was corrected back then. What year is the board? My Mini M is a 2022. I had to send it back to Unicomp and have a controller replaced or software installed on the controller. Can't remember. Yea it's a annoying issue.
Re: Leyden Jar loses power when Computer sleeps
Posted: 08 Jun 2025, 18:00
by fohat
I never use "sleep" but I think it is fair to assume that the adapter does not "wake up" until some moments after the motherboard "wakes up" and activates the USB ports.
Re: Leyden Jar loses power when Computer sleeps
Posted: 08 Jun 2025, 21:18
by memm74
Thanks. I am not sure what year the adapter is from but I just got it a few days ago.
The keyboard isn't coming back even after the motherboard is awake for a while. It doesn't also doesn't show up in Device Manager anymore (no surprise there).
Re: Leyden Jar loses power when Computer sleeps
Posted: 13 Jun 2025, 09:06
by memm74
Joe from Model F Keyboards kindly provided a new firmware from Rico that fixed the issue

. It changed the suspend_wakeup_delay setting. Apparently this is the first case like this. My best guess is that it has to do with my Lenovo.