Package: firmware-iwlwifi
Version : 20210315-3
OS version : 5.10.0-8-amd64 #1 SMP Debian 5.10.46-4 (2021-08-03) x86_64 GNU/Linux (Bullseye)
Affected hardware : Intel(R) Dual Band Wireless N 7260 (rev 6b)
After upgrading to Debian Bullseye the system fails to bring up wlan0
Related dmesg log :
[ 8.161363] iwlwifi 0000:3d:00.0: enabling device (0000 -> 0002)
[ 8.171390] iwlwifi 0000:3d:00.0: firmware: direct-loading firmware iwlwifi-7260-17.ucode
[ 8.171666] iwlwifi 0000:3d:00.0: loaded firmware version 17.3216344376.0 7260-17.ucode op_mode iwlmvm
[ 8.171689] iwlwifi 0000:3d:00.0: firmware: failed to load iwl-debug-yoyo.bin (-2)
[ 8.241108] iwlwifi 0000:3d:00.0: Detected Intel(R) Dual Band Wireless N 7260, REV=0x144
[ 13.320241] iwlwifi 0000:3d:00.0: Failed to load firmware chunk!
[ 13.320246] iwlwifi 0000:3d:00.0: iwlwifi transaction failed, dumping registers
[ 13.320248] iwlwifi 0000:3d:00.0: iwlwifi device config registers:
[ 13.320512] iwlwifi 0000:3d:00.0: 00000000: 08b18086 00100406 0280006b 00000010 cc100004 00000000 00000000 00000000
[ 13.320514] iwlwifi 0000:3d:00.0: 00000020: 00000000 00000000 00000000 c0608086 00000000 000000c8 00000000 00000100
[ 13.320515] iwlwifi 0000:3d:00.0: 00000040: 00020010 10008ec0 00130c10 0106ec11 101100ca 00000000 00000000 00000000
[ 13.320517] iwlwifi 0000:3d:00.0: 00000060: 00000000 00080812 00000405 00000000 00010001 00000000 00000000 00000000
[ 13.320518] iwlwifi 0000:3d:00.0: 00000080: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320520] iwlwifi 0000:3d:00.0: 000000a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320522] iwlwifi 0000:3d:00.0: 000000c0: 00000000 00000000 c823d001 0d000000 00814005 fee003f8 00000000 00000000
[ 13.320523] iwlwifi 0000:3d:00.0: 000000e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320525] iwlwifi 0000:3d:00.0: 00000100: 14010001 00004000 00000000 00462031 00002000 00002000 0000000e 00000000
[ 13.320526] iwlwifi 0000:3d:00.0: 00000120: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320528] iwlwifi 0000:3d:00.0: 00000140: 14c10003 ffbb884d 104a7dff 15410018 08460846 0001000b 0141cafe 00f01e1f
[ 13.320529] iwlwifi 0000:3d:00.0: iwlwifi device memory mapped registers:
[ 13.320581] iwlwifi 0000:3d:00.0: 00000000: 40489204 80000040 20000000 08000000 00000000 00000000 00000000 00000000
[ 13.320583] iwlwifi 0000:3d:00.0: 00000020: 00000009 080003c5 00000144 00000000 80000000 803a0000 80008040 00080046
[ 13.320587] iwlwifi 0000:3d:00.0: iwlwifi device AER capability structure:
[ 13.320620] iwlwifi 0000:3d:00.0: 00000000: 14010001 00004000 00000000 00462031 00002000 00002000 0000000e 00000000
[ 13.320621] iwlwifi 0000:3d:00.0: 00000020: 00000000 00000000 00000000
[ 13.320623] iwlwifi 0000:3d:00.0: iwlwifi parent port (0000:3c:01.0) config registers:
[ 13.320760] iwlwifi 0000:3c:01.0: 00000000: 240412d8 00180407 06040005 00010010 00000000 00000000 003d3d3c 000001f1
[ 13.320762] iwlwifi 0000:3c:01.0: 00000020: cc10cc10 0001fff1 00000000 00000000 00000000 00000040 00000000 000201ff
[ 13.320763] iwlwifi 0000:3c:01.0: 00000040: ffc34c01 00000008 00000000 00816405 fee002d8 00000000 00000000 00000000
[ 13.320765] iwlwifi 0000:3c:01.0: 00000060: 00000000 0034b009 04001060 04000800 80000000 0a730100 76b50080 21901d27
[ 13.320766] iwlwifi 0000:3c:01.0: 00000080: 000f0000 00000000 33083333 00790010 00008000 0000116b 000f0022 00000000
[ 13.320768] iwlwifi 0000:3c:01.0: 000000a0: 00000000 00000000 00000000 00000000 0000c00d 240412d8 00000000 00000000
[ 13.320769] iwlwifi 0000:3c:01.0: 000000c0: 00620010 00008001 00100000 01203c11 10110042 00000000 014803c0 00000000
[ 13.320771] iwlwifi 0000:3c:01.0: 000000e0: 00000000 00040800 00000400 00000000 00010042 00000000 00000000 00000000
[ 13.320772] iwlwifi 0000:3c:01.0: 00000100: 14010001 00000000 00000000 00062011 00000000 00002000 000000a0 00000000
[ 13.320774] iwlwifi 0000:3c:01.0: 00000120: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320775] iwlwifi 0000:3c:01.0: 00000140: 20c10002 00000801 03000000 00000000 047f0009 80000001 00000000 087f0019
[ 13.320777] iwlwifi 0000:3c:01.0: 00000160: 01000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320778] iwlwifi 0000:3c:01.0: 00000180: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320780] iwlwifi 0000:3c:01.0: 000001a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320781] iwlwifi 0000:3c:01.0: 000001c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320783] iwlwifi 0000:3c:01.0: 000001e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 13.320784] iwlwifi 0000:3c:01.0: 00000200: 00000000 00000000 00000000
[ 13.320788] iwlwifi 0000:3d:00.0: Could not load the [0] uCode section
[ 13.320798] iwlwifi 0000:3d:00.0: Failed to start INIT ucode: -110
[ 13.320800] iwlwifi 0000:3d:00.0: Collecting data: trigger 16 fired.
[ 13.568887] iwlwifi 0000:3d:00.0: Not valid error log pointer 0x00000000 for Init uCode
[ 13.568898] iwlwifi 0000:3d:00.0: Fseq Registers:
[ 13.568904] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_ERROR_CODE
[ 13.568910] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_TOP_INIT_VERSION
[ 13.568916] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_CNVIO_INIT_VERSION
[ 13.568921] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_OTP_VERSION
[ 13.568927] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_TOP_CONTENT_VERSION
[ 13.568933] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_ALIVE_TOKEN
[ 13.568939] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_CNVI_ID
[ 13.568944] iwlwifi 0000:3d:00.0: 0x00000000 | FSEQ_CNVR_ID
[ 13.568950] iwlwifi 0000:3d:00.0: 0x00000000 | CNVI_AUX_MISC_CHIP
[ 13.568956] iwlwifi 0000:3d:00.0: 0x00000000 | CNVR_AUX_MISC_CHIP
[ 13.568962] iwlwifi 0000:3d:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 13.568967] iwlwifi 0000:3d:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 14.550533] iwlwifi 0000:3d:00.0: Failing on timeout while stopping DMA channel 8 [0xa5a5a5a2]
[ 14.568322] iwlwifi 0000:3d:00.0: Failed to run INIT ucode: -110
Once moving back to Debian Buster (reinstalled the system, downgrade didn't work) the wifi is back in business
Thanks,