Intel AC 9260 wifi doesn't load in vm(sys-net under qubes os) after kernel update(5.6.rc3 to 5.6.rc5)

[Me]

With the help of Frédéric Pierret(many thanks again) I've recently updated my Qubes r4.1 fc31 to kernel 5.6-rc4(due lack of Nvidia rtx 2080 support under the old kernel).
Now the NV card works properly but I've lost the WiFi connection (under sys-net vm). 
I must mention it used to works perfectly on the older kernel version(actually any version up to 5.6, including 5.5.9 freshly compiled). 
I also updated the sys-net vm kernel verision to 5.6-rcX but I still have the issue. 
the WIFI card is attached to sys-net:

$ lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01)
00:04.0 VGA compatible controller: Device 1234:1111 (rev 02)
00:05.0 USB controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 10)
00:06.0 Network controller: Intel Corporation Wireless-AC 9260 (rev 29


Here is the output of dmseg of sys-net:

[    7.332438] iwlwifi 0000:00:06.0: Failed to load firmware chunk!
[    7.332458] iwlwifi 0000:00:06.0: iwlwifi transaction failed, dumping registers
[    7.332476] iwlwifi 0000:00:06.0: iwlwifi device config registers:
[    7.338624] iwlwifi 0000:00:06.0: 00000000: 25268086 00180406 02800029 00000000 f2010004 00000000 00000000 00000000
[    7.338651] iwlwifi 0000:00:06.0: 00000020: 00000000 00000000 00000000 15501a56 00000000 000000c8 00000000 0000010b
[    7.338677] iwlwifi 0000:00:06.0: 00000040: 00020010 00008ec0 00102810 0045e812 10120000 00000000 00000000 00000000
[    7.338701] iwlwifi 0000:00:06.0: 00000060: 00000000 00080812 00000000 00000000 00000002 00000000 00000000 00000000
[    7.338725] iwlwifi 0000:00:06.0: 00000080: 000f0011 00002000 00003000 00000000 00000000 00000000 00000000 00000000
[    7.338749] iwlwifi 0000:00:06.0: 000000a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    7.338773] iwlwifi 0000:00:06.0: 000000c0: 00000000 00000000 0023d001 0d000008 00804005 fee97000 00000000 00004300
[    7.338797] iwlwifi 0000:00:06.0: 000000e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    7.338822] iwlwifi 0000:00:06.0: Read failed at 0x100
[    7.338836] iwlwifi 0000:00:06.0: Could not load the [0] uCode section
[    7.338860] iwlwifi 0000:00:06.0: Failed to start INIT ucode: -110
[    7.338877] iwlwifi 0000:00:06.0: Collecting data: trigger 16 fired.
[    7.588505] iwlwifi 0000:00:06.0: Not valid error log pointer 0x00000000 for Init uCode
[    7.588537] iwlwifi 0000:00:06.0: Fseq Registers:
[    7.588557] iwlwifi 0000:00:06.0: 0x66C2C9EE | FSEQ_ERROR_CODE
[    7.588579] iwlwifi 0000:00:06.0: 0x00000000 | FSEQ_TOP_INIT_VERSION
[    7.588602] iwlwifi 0000:00:06.0: 0x815790C8 | FSEQ_CNVIO_INIT_VERSION
[    7.588624] iwlwifi 0000:00:06.0: 0x0000A371 | FSEQ_OTP_VERSION
[    7.588645] iwlwifi 0000:00:06.0: 0xF133AC29 | FSEQ_TOP_CONTENT_VERSION
[    7.588668] iwlwifi 0000:00:06.0: 0xAFFDD78E | FSEQ_ALIVE_TOKEN
[    7.588689] iwlwifi 0000:00:06.0: 0xB1F3B688 | FSEQ_CNVI_ID
[    7.588709] iwlwifi 0000:00:06.0: 0x6F9FEAC3 | FSEQ_CNVR_ID
[    7.588729] iwlwifi 0000:00:06.0: 0x01000200 | CNVI_AUX_MISC_CHIP
[    7.588753] iwlwifi 0000:00:06.0: 0x01300202 | CNVR_AUX_MISC_CHIP
[    7.588778] iwlwifi 0000:00:06.0: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[    7.588856] iwlwifi 0000:00:06.0: 0x0BADCAFE | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[    7.588929] iwlwifi 0000:00:06.0: Firmware not running - cannot dump error
[    7.601717] iwlwifi 0000:00:06.0: Failed to run INIT ucode: -110


Any help will be highly appreciated.

Thank you

[Marek Marczykowski-Górecki]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On Thu, Mar 12, 2020 at 06:12:10AM -0700, Me wrote:
>
>
> With the help of Frédéric Pierret(many thanks again) I've recently updated my Qubes r4.1 fc31 to kernel 5.6-rc4(due lack of Nvidia rtx 2080 support under the old kernel).
> Now the NV card works properly but I've lost the WiFi connection (under sys-net vm).

Did you also switched sys-net to 5.6 kernel?
Also, when you built 5.6 kernel, did you have some issues with any
patches? Especially
0014-xen-pciback-add-attribute-to-allow-MSI-enable-flag-w.patch is
important (in dom0) for various PCI devices to work in sys-net and
sys-usb.

> I must mention it used to works perfectly on the older kernel version(actually any version up to 5.6, including 5.5.9 freshly compiled).
> I also updated the sys-net vm kernel verision to 5.6-rcX but I still have the issue.

What happens if you switch it back to 5.5 or older?

- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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[Me]

Hi Marek,

Thank you for your reply.


1. Yes, I've been tried kernel 5.6 in sys-net as well. No changes, same issue.
I didn't get any errors while compiling. I had a problem with grub configuration after installing the kernel but I've sort it manually. I also tried the latest-kernel compiled by Frédéric and same results.

2. When I switch back to 5.5x I'm losing my grafic card. It runs with nomodeset only. (doesn't work with rd.driver.blacklist=nouveau)
It is not frozen but it looks like it takes a much bigger resolution(I have 1920x1080). Also under 5.5 I've been tried to install the nvidia driver from rpm fusion negatico and the proprietary driver from nvidia directly. please see the attached image. this is the result.

[Me]

After a closer look the patch:

0014-xen-pciback-add-attribute-to-allow-MSI-enable-flag-w.patch

was not even added to kernel. I will add it and re compile it.

Thank you very much