Which module are you using?
i have several different module, include EM7511, MC7430, EM7455
What value before you config?
each module have different setting, for example MC7430 is “10D”
i won’t config it, if it is function well.
but some how the config value seems changed by different driver.
such as windows driver or qmi driver. and it caused the ttyUSB* disappear.
similar to
https://forum.sierrawireless.com/t/my-mc7710-cant-work-on-linux-after-plug-in-it-to-windows8/7986
https://forum.sierrawireless.com/t/why-the-ttyusb-disappear-only-cdc-wdm0-interface-left/8591/6
because of the ttyUSB* disappear i won’t be able to recover the config value.
What value are you setting in at! usbcomp
after this issue happened, i found the only solution is to set the original setting under windows system.
i don’t know why, but it works!
although it can be fixed by this way, it still caused a lot of time doing this, i’m hoping there is some other solution under linux system