Whooops, I read to avoid pastebin links, I'll attach files from original post. here modem rule in /etc/udev/rules.d/
** Attachment added: "Modem Rule" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1906263/+attachment/5439649/+files/61-gprs-modem.rules -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1906263 Title: Udev Randomly Doesn't Run Run Script on Remove Status in systemd package in Ubuntu: New Bug description: Hello, I'm running ubuntu (Description: Ubuntu 18.04.4 LTS, Release: 18.04) with 5.0.21-sunxi kernel. I've updated udev to latest version (237-3ubuntu10.43 500). I've written the following rule to create (and removing) symlink to modem ports: https://pastebin.com/cUwHrf1f Since many usb modems hase more than one serial i enumerate them with their port number (as just some specific serial can be used to connect) Here link to mu RUN script /opt/trx/gprs-modem-symlink-handler.bash https://pastebin.com/2XTCiV27 What I expect to happen is having many /dev/ttyTRXGPRSMODEM* (enumerated) when I plug-in a modem in the list, and having symlink cleared on removing. every modem listed in rule is using "option" usb serial driver. When i plug in a device I have no issues, everything works fine. But sometimes, on removing, I found that some links are still there (it's not happening everytime). I've enabled debug log with udev and found that sometimes is not calling RUN script: Here the working situation (3 tty remove events and 3 RUN events): https://pastebin.com/EKX5zMh7 And here is the buggy situation (3 tty remove events, but only 2 RUN events) with the same device as the example above: https://pastebin.com/dB7ujQ79 Since it's happening randomly I can't figure out whats causing the problem. I guess it's not the rule because on an old debian 7 release it's working fine, and on the release described above I get others symlinks removed even in the buggy situation (as in the example: two are removed, one not). It seems like sometimes udev ignores totally the run event. Last thing to report: I'm not opening these links! So are not locked or protected. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1906263/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
