Adding an x86-64 data point, since the existing reports appear to be on ARM platforms (Surface Laptop 7 / Snapdragon X1E, Lenovo Legion ARM). Same Wi-Fi chip, same kernel series, different platform — so this may help confirm the regression isn't ARM-specific. System
Platform: x86-64 desktop (not ARM) CPU/chipset: Intel Raptor Lake-S Distro: Ubuntu 24.04 LTS (noble) Wi-Fi card: Qualcomm WCN785x Wi-Fi 7 (802.11be) [FastConnect 7800], PCI ID 17cb:1107, on an M.2 slot Driver: ath12k / ath12k_pci Kernels tested (HWE track, linux-generic-hwe-24.04): 6.14.0-x-generic — Wi-Fi works correctly. Card present, interface comes up, connects normally. 6.17.0-22-generic — Wi-Fi non-functional. No wireless interface available; NetworkManager shows no Wi-Fi device; rfkill lists only Bluetooth (no Wi-Fi entry, not blocked). 6.17.0-29-generic — (see note below re: separate display regression; Wi-Fi status on this kernel not separately confirmed.) Symptom detail / possible divergence from this bug: On 6.17.0-22, my observation was that the card did not appear in lspci, lsusb, or lshw -C network at all — i.e. it seemed absent from the PCI bus rather than present-but-failing-to-bind. The existing reports here describe the device being enumerated but ath12k_pci failing to fetch the board data file (failed to fetch board.bin from WCN7850/hw2.0, qmi failed to load board data file:-2). I did not capture dmesg from the failing boot, so I can't confirm whether my case shows the same QMI/board-file failure or a different (bus-enumeration) issue. Flagging this in case it's a related-but-distinct failure mode rather than an exact match. Regression summary: Last known-good kernel is 6.14.0-x; the card became non-functional on the 6.17.0-22 HWE update. Reverting to 6.14 fully restores Wi-Fi. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2130959 Title: Regression in Qualcomm WCN7850 wifi drivers causing ath12k driver to fail to load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2130959/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
