Debian 12 / ttyX30

[rFond]

Hello, with the latest version of Debian (device version FS03), the ttyX30 port no longer exists. To fix the issue, I had to modify the /etc/udev/rules.d/20-create-symbolic-link-for-serial-port.rules file.

The kernel is no longer correct: udevadm info --attribute-walk --path=$(udevadm info --query=path --name=/dev/ttyUSB0)

looking at parent device '/devices/platform/bus@100000/4000000.dwc3/4010000.usb/xhci-hcd.0.auto/usb1/1-1/1-1.4/1-1.4:1.0': KERNELS=="1-1.4:1.0" SUBSYSTEMS=="usb" DRIVERS=="cp210x" ATTRS{authorized}=="1" ATTRS{bAlternateSetting}==" 0" ATTRS{bInterfaceClass}=="ff" ATTRS{bInterfaceNumber}=="00" ATTRS{bInterfaceProtocol}=="00" ATTRS{bInterfaceSubClass}=="00" ATTRS{bNumEndpoints}=="02" ATTRS{supports_autosuspend}=="1"

So in my new file : SUBSYSTEM=="tty", SUBSYSTEMS=="usb", KERNELS=="1-1.4:1.0", DRIVERS=="cp210x", SYMLINK+="ttyX30" SUBSYSTEM=="tty", KERNEL=="ttyS2", DRIVERS=="omap8250", SYMLINK+="ttyX30"

[jan-kiszka]

Good catch! Do you want to write this fix as patch, or should we?

[rFond]

I'm happy for you to do it. I'm not very comfortable with Git. Thank's

[jan-kiszka]

• fork this repo on github
• git clone ...
• git checkout -b ttyX30-fix (or whatever name you want to choose for the branch
• edit file
• git commit -asv
• git push origin ttyX30-fix
• click on the link shown locally to create a merge request

That's a rough plan, and I probably forgot some detail now. Drop questions then. And the rest we can sort out in the merge request.

[rFond]

Sorry but I won't be able to correct this problem. I don't have the technical knowledge to do this

[jan-kiszka]

No problem, will take over.

[jan-kiszka]

It turned out to be more complex: The issue was rooted in the wiring differences between PG1 and PG2 devices, not in the software version. Please give the proposed solution a try.