Bug#915008: I've seen a similar problem and managed to work around it.

From	John Hughes <john.hughes@calva.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#915008: I've seen a similar problem and managed to work around it.
Date	2020-07-29 13:00 +0200
Message-ID	<AxRYt-79Y-1@gated-at.bofh.it> (permalink)
References	<wZtLQ-22W-7@gated-at.bofh.it>
Organization	CalvaEDI S.A.S.

Cross-posted to 2 groups.

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

(Disclaimer, don't know if it's exactly the same problem).

On one of our DELL Lattitude 5400 laptops the wifi stopped working, giving:

Jul 27 22:00:04 oceanic kernel: [  141.298350] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
Jul 27 22:00:04 oceanic kernel: [  141.323938] iwlwifi 0000:00:14.3: firmware: direct-loading firmware iwlwifi-9000-pu-b0-jf-b0-38.ucode
Jul 27 22:00:04 oceanic kernel: [  141.324553] iwlwifi 0000:00:14.3: loaded firmware version 38.755cfdd8.0 op_mode iwlmvm
Jul 27 22:00:04 oceanic kernel: [  141.403707] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
Jul 27 22:00:04 oceanic kernel: [  141.646515] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
Jul 27 22:00:04 oceanic kernel: [  141.646524] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
Jul 27 22:00:04 oceanic kernel: [  141.646566] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2475
Jul 27 22:00:04 oceanic kernel: [  141.646569] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
Jul 27 22:00:04 oceanic kernel: [  141.658825] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5

I tried updating firmware-iwlwifi to 20190717-2~bpo10+1, no change

I upgraded to kernel 5.6.14-2~bpo10+1, and hence 
9000-pu-b0-jf-b0-46.ucode which gave more output but still didn't work:

Jul 29 11:52:21 oceanic kernel: [   12.133630] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
Jul 29 11:52:21 oceanic kernel: [   12.150217] iwlwifi 0000:00:14.3: firmware: direct-loading firmware iwlwifi-9000-pu-b0-jf-b0-46.ucode
Jul 29 11:52:21 oceanic kernel: [   12.150233] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
Jul 29 11:52:21 oceanic kernel: [   12.150234] iwlwifi 0000:00:14.3: Found debug configuration: 0
Jul 29 11:52:21 oceanic kernel: [   12.150622] iwlwifi 0000:00:14.3: loaded firmware version 46.a41adfe7.0 9000-pu-b0-jf-b0-46.ucode op_mode iwlmvm
Jul 29 11:52:21 oceanic kernel: [   12.233985] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560 160MHz, REV=0x318
Jul 29 11:52:21 oceanic kernel: [   12.241362] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 11:52:21 oceanic kernel: [   12.241616] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
Jul 29 11:52:21 oceanic kernel: [   12.274019] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
Jul 29 11:52:21 oceanic kernel: [   12.274025] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00000000 for Init uCode
Jul 29 11:52:21 oceanic kernel: [   12.274042] iwlwifi 0000:00:14.3: Fseq Registers:
Jul 29 11:52:21 oceanic kernel: [   12.274050] iwlwifi 0000:00:14.3: 0xE8680755 | FSEQ_ERROR_CODE
Jul 29 11:52:21 oceanic kernel: [   12.274059] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_TOP_INIT_VERSION
Jul 29 11:52:21 oceanic kernel: [   12.274067] iwlwifi 0000:00:14.3: 0x304500C4 | FSEQ_CNVIO_INIT_VERSION
Jul 29 11:52:21 oceanic kernel: [   12.274075] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION
Jul 29 11:52:21 oceanic kernel: [   12.274084] iwlwifi 0000:00:14.3: 0x8F6E77E5 | FSEQ_TOP_CONTENT_VERSION
Jul 29 11:52:21 oceanic kernel: [   12.274092] iwlwifi 0000:00:14.3: 0xC5F6D9EF | FSEQ_ALIVE_TOKEN
Jul 29 11:52:21 oceanic kernel: [   12.274100] iwlwifi 0000:00:14.3: 0x08234C18 | FSEQ_CNVI_ID
Jul 29 11:52:21 oceanic kernel: [   12.274109] iwlwifi 0000:00:14.3: 0xBCDE7DBF | FSEQ_CNVR_ID
Jul 29 11:52:21 oceanic kernel: [   12.274117] iwlwifi 0000:00:14.3: 0x01000100 | CNVI_AUX_MISC_CHIP
Jul 29 11:52:21 oceanic kernel: [   12.274128] iwlwifi 0000:00:14.3: 0x01300202 | CNVR_AUX_MISC_CHIP
Jul 29 11:52:21 oceanic kernel: [   12.274138] iwlwifi 0000:00:14.3: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
Jul 29 11:52:21 oceanic kernel: [   12.274179] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
Jul 29 11:52:21 oceanic kernel: [   12.274224] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x3, CPU2 Status: 0x2386
Jul 29 11:52:21 oceanic kernel: [   12.274227] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -5
Jul 29 11:52:21 oceanic kernel: [   12.274229] iwlwifi 0000:00:14.3: Collecting data: trigger 16 fired.
Jul 29 11:52:21 oceanic kernel: [   12.522663] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error
Jul 29 11:52:21 oceanic kernel: [   12.534415] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -5

In desperation I booted into windows to see if the wifi worked there, 
and it did.

Then I rebooted Debian and the wifi now works.

Jul 29 12:13:09 oceanic kernel: [   15.067344] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
Jul 29 12:13:09 oceanic kernel: [   15.072020] iwlwifi 0000:00:14.3: firmware: direct-loading firmware iwlwifi-9000-pu-b0-jf-b0-46.ucode
Jul 29 12:13:09 oceanic kernel: [   15.072039] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
Jul 29 12:13:09 oceanic kernel: [   15.072039] iwlwifi 0000:00:14.3: Found debug configuration: 0
Jul 29 12:13:09 oceanic kernel: [   15.072269] iwlwifi 0000:00:14.3: loaded firmware version 46.a41adfe7.0 9000-pu-b0-jf-b0-46.ucode op_mode iwlmvm
Jul 29 12:13:09 oceanic kernel: [   15.226922] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560 160MHz, REV=0x318
Jul 29 12:13:09 oceanic kernel: [   15.235063] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 12:13:09 oceanic kernel: [   15.235387] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
Jul 29 12:13:09 oceanic kernel: [   15.280681] iwlwifi 0000:00:14.3: base HW address: ac:67:5d:2d:e3:ee
Jul 29 12:13:09 oceanic kernel: [   15.518852] iwlwifi 0000:00:14.3 wlo1: renamed from wlan0
Jul 29 12:13:10 oceanic kernel: [   15.859594] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 12:13:10 oceanic kernel: [   15.974940] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 12:13:10 oceanic kernel: [   16.039011] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
Jul 29 12:13:10 oceanic kernel: [   16.078459] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 12:13:10 oceanic kernel: [   16.207940] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Jul 29 12:13:10 oceanic kernel: [   16.275045] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring

It is possible that this problem was caused by the laptop battery 
running completely flat, and the Linux driver or firmware missing some 
initialisation step.

-- 

*John HUGHES*
Directeur technique
*CalvaEDI*
An Esker Company
58/A rue du Dessous des Berges, 75013 Paris
Tel. : (+33) 1 4313 3131
Fax : (+33) 1 4313 3139

Thread

Bug#915008: firmware-iwlwifi: latest firmware broken for Intel AC9560 Maarten <maarten.dirkse@gmail.com> - 2018-11-29 13:40 +0100
  Bug#915008:  Maarten <maarten.dirkse@gmail.com> - 2018-11-29 21:30 +0100
  Bug#915008: I've seen a similar problem and managed to work around it. John Hughes <john.hughes@calva.com> - 2020-07-29 13:00 +0200
  Bug#915008: marked as done (firmware-iwlwifi: latest firmware  broken for Intel AC9560) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-03-14 16:30 +0100

csiph-web