Arch Linux

dtto86

Member

Registered: 2013-03-07

Posts: 19

[SOLVED] Wifi interface not created after fresh installation

During installation, "wlan0" interface was visible via "ip link" command. Did minimal installation with Ethernet connection. After first login, checked whether wifi interface is available but to my surprise, only "lo" & "enp1s0f0" interfaces were available.
Sharing needed info which will help in debugging issue.

ip link output

❯ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp1s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether c4:c6:e6:e3:dd:d0 brd ff:ff:ff:ff:ff:ff

lspci -k output

2:00.0 Network controller: Qualcomm Technologies, Inc WCN785x Wi-Fi 7(802.11be) 320MHz 2x2 [FastConnect 7800] (rev 01)
    Subsystem: Lenovo Device e0e6
    Kernel driver in use: ath12k_pci
    Kernel modules: ath12k

dmesg logs

❯ sudo dmesg | grep ath12k
[    4.504082] ath12k_pci 0000:02:00.0: BAR 0 [mem 0x90600000-0x907fffff 64bit]: assigned
[    4.504104] ath12k_pci 0000:02:00.0: enabling device (0000 -> 0002)
[    4.504923] ath12k_pci 0000:02:00.0: MSI vectors: 16
[    4.504928] ath12k_pci 0000:02:00.0: Hardware name: wcn7850 hw2.0
[    5.059170] ath12k_pci 0000:02:00.0: chip_id 0x2 chip_family 0x4 board_id 0xff soc_id 0x40170200
[    5.059181] ath12k_pci 0000:02:00.0: fw_version 0x100301e1 fw_build_timestamp 2023-12-06 04:05 fw_build_id QC_IMAGE_VERSION_STRING=WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
[    5.072133] ath12k_pci 0000:02:00.0: failed to fetch board data for bus=pci,vendor=17cb,device=1107,subsystem-vendor=17aa,subsystem-device=e0e6,qmi-chip-id=2,qmi-board-id=255 from ath12k/WCN7850/hw2.0/board-2.bin
[    5.072139] ath12k_pci 0000:02:00.0: failed to fetch board.bin from WCN7850/hw2.0
[    5.072140] ath12k_pci 0000:02:00.0: qmi failed to load bdf:
[    5.072142] ath12k_pci 0000:02:00.0: qmi failed to load board data file:-2
[   16.064546] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq rfcomm snd_seq_device cmac algif_hash qrtr_mhi algif_skcipher af_alg bnep vfat fat qrtr amd_atl intel_rapl_msr intel_rapl_common ath12k qmi_helpers snd_soc_dmic snd_soc_ps_mach joydev snd_ps_pdm_dma mousedev snd_sof_amd_acp63 snd_sof_amd_vangogh snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_pci_ps snd_amd_sdw_acpi snd_ctl_led soundwire_amd soundwire_generic_allocation snd_hda_codec_realtek kvm_amd soundwire_bus snd_hda_codec_generic snd_hda_scodec_component snd_hda_codec_hdmi snd_soc_core kvm snd_hda_intel btusb snd_compress uvcvideo btrtl snd_intel_dspcfg ac97_bus btintel videobuf2_vmalloc snd_pcm_dmaengine snd_intel_sdw_acpi snd_rpl_pci_acp6x crct10dif_pclmul btbcm uvc snd_hda_codec snd_acp_pci hid_multitouch btmtk crc32_pclmul videobuf2_memops snd_acp_legacy_common hid_generic polyval_clmulni snd_hda_core videobuf2_v4l2 mac80211 snd_pci_acp6x polyval_generic snd_pci_acp5x snd_hwdep
[ 7509.011302] ath12k_pci 0000:02:00.0: chip_id 0x2 chip_family 0x4 board_id 0xff soc_id 0x40170200
[ 7509.011307] ath12k_pci 0000:02:00.0: fw_version 0x100301e1 fw_build_timestamp 2023-12-06 04:05 fw_build_id QC_IMAGE_VERSION_STRING=WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
[ 7509.022111] ath12k_pci 0000:02:00.0: failed to fetch board data for bus=pci,vendor=17cb,device=1107,subsystem-vendor=17aa,subsystem-device=e0e6,qmi-chip-id=2,qmi-board-id=255 from ath12k/WCN7850/hw2.0/board-2.bin
[ 7509.022113] ath12k_pci 0000:02:00.0: failed to fetch board.bin from WCN7850/hw2.0
[ 7509.022115] ath12k_pci 0000:02:00.0: qmi failed to load bdf:
[ 7509.022116] ath12k_pci 0000:02:00.0: qmi failed to load board data file:-2
[ 7529.755558] ath12k_pci 0000:02:00.0: timeout while waiting for restart complete
[ 7529.755565] ath12k_pci 0000:02:00.0: failed to resume core: -110
[ 7529.755569] ath12k_pci 0000:02:00.0: PM: dpm_run_callback(): pci_pm_resume returns -110
[ 7529.755579] ath12k_pci 0000:02:00.0: PM: failed to resume async: error -110

Kernel version is "6.10.10-arch1-1"

Need your guidance is fixing the Wifi issue.

Last edited by dtto86 (2024-09-21 05:36:18)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 23,300

Re: [SOLVED] Wifi interface not created after fresh installation

assuming linux-firmware is actually installed it currently has a regression for these chipsets, see https://bbs.archlinux.org/viewtopic.php?id=299286 and use one of the reverted builds at the end of the thread

dtto86

Member

Registered: 2013-03-07

Posts: 19

Re: [SOLVED] Wifi interface not created after fresh installation

Thanks @V1del for your help.

Yes, issue was with linux-firmware. Followed steps suggested by @gromit, now wifi is up and running.