When I use sys-kernel/gentoo-kernel-6.14.2 here is an extract of dmesg: [ven. 11 avril 18:57:38 2025] usb 1-2: new high-speed USB device number 6 using xhci_hcd [ven. 11 avril 18:57:38 2025] usb 1-2: New USB device found, idVendor=05c6, idProduct=f00e, bcdDevice= 4.19 [ven. 11 avril 18:57:38 2025] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ven. 11 avril 18:57:38 2025] usb 1-2: Product: Fairphone 4 5G [ven. 11 avril 18:57:38 2025] usb 1-2: Manufacturer: Fairphone [ven. 11 avril 18:57:38 2025] usb 1-2: SerialNumber: 8ad9a150 [ven. 11 avril 18:57:38 2025] rndis_host 1-2:1.0 wwan0: register 'rndis_host' at usb-0000:c1:00.3-2, Mobile Broadband RNDIS device, 1a:3a:df:12:0a:16 [ven. 11 avril 18:57:38 2025] usbcore: registered new interface driver rndis_host [ven. 11 avril 18:57:38 2025] rndis_host 1-2:1.0 wwp193s0f3u2: renamed from wwan0 And NetworkManager is not able to use this connection. But, when I use sys-kernel/gentoo-kernel-6.14.1 here is an extract of dmesg: [ven. 11 avril 19:04:11 2025] usb 1-2: new high-speed USB device number 6 using xhci_hcd [ven. 11 avril 19:04:11 2025] usb 1-2: New USB device found, idVendor=05c6, idProduct=f00e, bcdDevice= 4.19 [ven. 11 avril 19:04:11 2025] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ven. 11 avril 19:04:11 2025] usb 1-2: Product: Fairphone 4 5G [ven. 11 avril 19:04:11 2025] usb 1-2: Manufacturer: Fairphone [ven. 11 avril 19:04:11 2025] usb 1-2: SerialNumber: 8ad9a150 [ven. 11 avril 19:04:11 2025] rndis_host 1-2:1.0 usb0: register 'rndis_host' at usb-0000:c1:00.3-2, RNDIS device, 36:55:87:b7:74:88 [ven. 11 avril 19:04:11 2025] usbcore: registered new interface driver rndis_host [ven. 11 avril 19:04:11 2025] rndis_host 1-2:1.0 enp193s0f3u2: renamed from usb0 And NetworkManager is able to use this connection. The only differences I see is that usb0/wwan0 and enp193s0f3u2/wwp193s0f3u2. Reproducible: Always Steps to Reproduce: 1. Update to sys-kernel/gentoo-kernel-6.14.2 2. Try to use network sharing via smartphone (USB) Actual Results: It does not work. Expected Results: It works.
Maybe linked to: commit d34963d968a6e5f5f98ceecc987fc9f221f1cac7 Author: Lubomir Rintel <lkundrak@v3.sk> Date: Tue Mar 25 10:58:41 2025 +0100 rndis_host: Flag RNDIS modems as WWAN devices [ Upstream commit 67d1a8956d2d62fe6b4c13ebabb57806098511d8 ] Set FLAG_WWAN instead of FLAG_ETHERNET for RNDIS interfaces on Mobile Broadband Modems, as opposed to regular Ethernet adapters. Otherwise NetworkManager gets confused, misjudges the device type, and wouldn't know it should connect a modem to get the device to work. What would be the result depends on ModemManager version -- older ModemManager would end up disconnecting a device after an unsuccessful probe attempt (if it connected without needing to unlock a SIM), while a newer one might spawn a separate PPP connection over a tty interface instead, resulting in a general confusion and no end of chaos. The only way to get this work reliably is to fix the device type and have good enough version ModemManager (or equivalent). Fixes: 63ba395cd7a5 ("rndis_host: support Novatel Verizon USB730L") Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Link: https://patch.msgid.link/20250325095842.1567999-1-lkundrak@v3.sk Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Found it on kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=220002
I just confirmed it, reverting commit d34963d968a6e5f5f98ceecc987fc9f221f1cac7, resolve the issue.
FWIW, I'd report that on the mailing lists. Nobody really looks at kernel.org BZ except for a very small number of kernel subsystems.
