USB_MODEWITCH script in /usr/lib/ calls USB_MODESWITCH in case of a systemd- system. "Older" systems are handled using /usr/bin/usb_modeswitch_wrapper which hast - as 1.st Line - #!/usr/bin/tclsh W/O TCL (i.e. only jimtcl) the interpreter ist Missing (tested on 3 systems containing Gentoo Profile 23 with kernel 6.6.21 and manual switch to Python 3.13 I assume, because there ist No dependency to tcl (also Not for usb_modeswitch), tcl was removed during cleanup while Manual updating Python. I was wondering about the "non switching" of my USB LTE stick. I assumed an issue with some packages and completely re- installed the system, Just to detect, that it is "again" Not working. After installing TCL 8, and restarting the system, it works as expected. Even TCL ist Not needed for compiling USB_MODEWITCH, it is needed for operation. And if it will Not lead to a dependency durng install, it should be added into the WIKI to ensure proper operation. Regards isoldia PS: Sorry for some "capitals" - but there ist German, and my tablet I am writing about it, does not want to have the English spell checking but remains in German