Known bug in IGC kernel module causes shutdown bug in z690 environments

[Sebastian Lutter]

I own a Asus z690 Apex board, and shutdown hangs because of a bug in IGC driver. I cannot provide any logs because this happens after filesystem driver has been shut down and display/graphics have been turned of. The PC simply never turns off.

I can disable the network interface in UEFI Bios, then the problem disappears.

As far as I know a newer 5.15.x version already contains a fix. Since most users that own a AlderLake / z690 will be affected by this bug it should be fixed before release. I read about some MSI boards does not have that problem, but any other mainboards (asus, asrocks, gigabyte etc) seem to have this bug.

I updated my bios and tried different shutdown commands without success

Related links:

- https://groups.google.com/g/linux.debian.bugs.dist/c/i6buM9KpulI?pli=1
- https://bbs.archlinux.org/viewtopic.php?id=272338
- https://www.reddit.com/r/Fedora/comments/r3hxt0/restartshut_down_problem_on_kernel_5154201/

```
phoenix@dev:~$ lsb_release -rd
Description: Ubuntu Jammy Jellyfish (development branch)
Release: 22.04

phoenix@dev:~$ cat /proc/version_signature
Ubuntu 5.15.0-18.18-generic 5.15.12
```

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-generic 5.15.0.18.18
ProcVersionSignature: Ubuntu 5.15.0-18.18-generic 5.15.12
Uname: Linux 5.15.0-18-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu77
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 18 13:37:10 2022
InstallationDate: Installed on 2021-06-11 (252 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
MachineType: ASUS System Product Name
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-18-generic root=UUID=1d617086-e30d-4dd3-a313-3b435ea89649 ro quiet splash mitigations=off systemd.unified_cgroup_hierarchy=false vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-18-generic N/A
 linux-backports-modules-5.15.0-18-generic N/A
 linux-firmware 20220124.git0c6a7b3b-0ubuntu1
SourcePackage: linux
UpgradeStatus: Upgraded to jammy on 2022-01-14 (34 days ago)
dmi.bios.date: 01/26/2022
dmi.bios.release: 11.1
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: Default string
dmi.board.name: ROG MAXIMUS Z690 APEX
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1101:bd01/26/2022:br11.1:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGMAXIMUSZ690APEX:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: ASUS

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Sebastian Lutter (sebastianlutter)]

Found this related kernel patch for igb and igc:
 - https://bugzilla.kernel.org/show_bug.cgi?id=215129

The post states that for igb kernel module a fix is included in 5.15.12. I tested with kernel 5.15.12 (Ubuntu 5.15.0-18.18-generic 5.15.12) and the bug remains in my case using igc kernel module.

[Sebastian Lutter (sebastianlutter)]

When I unload the **igc** module while system is running it triggers a reboot, just like described here:
 - https://lore<email address hidden>/

The 5.15.12 kernel seems to fix the issue for **igb** kernel module but not for **igc**. According to this forum thread (last message) kernel version 5.15.13 solves the problem for **igc**:
 - https://bbs.archlinux.org/viewtopic.php?pid=2014226#p2014226

[Sebastian Lutter (sebastianlutter)]

Today a new linux image was available (update from 5.15.12 to 5.15.19). After installation the problems with AlderLake/z690 network module IGC are solved.

```
phoenix@dev:~$ cat /proc/version_signature
Ubuntu 5.15.0-22.22-generic 5.15.19
```

I can now happily reboot and shutdown my box :) Can someone please close this issue, because I does not seem to have the permission to do so.