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2020-08-11, 08:54 AM
(This post was last modified: 2020-08-11, 12:01 PM by Rooco.)
Obviously there is a problem with TTY devices with the new kernel. The HAT registers itself as TTY as well. They've changed something at the registration process and this might cause problems on some systems. The problem definitely exists on the Pi 3 and Pi 3+. We didn't face any issues with the Pi 4. However, the theoretically the problem might be on the Pi 4 as well, if the system uses additional TTY devices.
A solution is already in testing stage and we might publish soon if successfull.
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Great that it works!!!
I think the driver for the MCS board is facing the same issue. I'm not sure if this is a bug in the new Raspberry Pi kernel or a feature. The problem is definitely caused by a fixed device numbering for TTY devices.
Regards,
Thomas