Hi, I plugged my USB (bus powered) vacuum fluorescent display (VFD) pole device and detected as uplcom(4) driver. After the device has been detected kernel panic was observed or freezes the whole system. Please see attached screenshot https://i.postimg.cc/sXSJyc4S/IMG-7820.jpg and dmesg for details.
For now, the only way to prevent the issue is to shutdown my Raspberry Pi 4B system and then plug the VFD device. There is no problem with OpenBSD-6.7 i386 release, plug and play works as expected. uplcom0 at uhub2 port 4 configuration 1 interface 0 "Prolific Technology Inc. USB-Serial Controller" rev 2.00/3.00 addr 7 ucom0 at uplcom0 Hardware: Raspberry Pi 4B UEFI Firmware: UEFI v1.18 OpenBSD-current (arm64): August 27, 2020 Thanks and best regards, Archimedes
dmesg_openbsd-6.7-arm64-current_uplcom-kernel-panic
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