*** This bug is a duplicate of bug 1959110 ***
https://bugs.launchpad.net/bugs/1959110
** This bug has been marked a duplicate of bug 1959110
pl2303 serial adapter no longer recognized
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https://bugs.launchpad.net/bugs/1960579
Title:
PL2303 Driver Bug in 5.13 Kernel
Status in linux package in Ubuntu:
Incomplete
Bug description:
Looks like 5.13.0 kernel broke something in the USB-serial PL2303
driver module. I have a Sky-Watcher EQ6-R Pro telescope mount with a
PL23D3 USB-serial chip (I think). My MSECORE mini PC running Ubuntu
20.04.3 has been working with this mount for the last couple of years
with the 5.11 kernel. Now with the 5.13 kernel, the pl2303 module
doesn't recognize the USB-serial device. I revert back to the 5.11
kernel and it works fine again. Here's the snippets from dmesg:
5.13.0-28-generic kernel:
[ 2.894277] usbcore: registered new interface driver usbserial_generic
[ 2.894292] usbserial: USB Serial support registered for generic
[ 2.907539] usbcore: registered new interface driver pl2303
[ 2.907574] usbserial: USB Serial support registered for pl2303
[ 2.907596] pl2303 1-6:1.0: pl2303 converter detected
[ 2.907602] pl2303 1-6:1.0: unknown device type, please report to
linux-...@vger.kernel.org
5.11.0-27-generic kernel
[ 3.201216] usbcore: registered new interface driver pl2303
[ 3.201228] usbserial: USB Serial support registered for pl2303
[ 3.201243] pl2303 1-5:1.0: pl2303 converter detected
[ 3.201349] usb 1-5: pl2303 converter now attached to ttyUSB1
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