Public bug reported:
Realtek ethernet network interface is broken when booting with kernel 5.8.0-31.
It works fine when simply booting with previous kernel 5.8.0-29 in GRUB.
No other packages were updated.
The only related line in /var/log/kern.log:
Dec 3 14:01:21 hd kernel: [ 17.824691] genirq: Flags mismatch irq 16.
00010080 (enp4s0) vs. 00002080 (uhci_hcd:usb3)
`lspci -v` for this network interface below (`lspci -vv` attached):
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411
PCI Express Gigabit Ethernet Controller (rev 01)
Subsystem: Gigabyte Technology Co., Ltd Onboard Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 16
I/O ports at d000 [size=256]
Memory at f8000000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at f7000000 [virtual] [disabled] [size=128K]
Capabilities: [40] Power Management version 2
Capabilities: [48] Vital Product Data
Capabilities: [50] MSI: Enable- Count=1/2 Maskable- 64bit+
Capabilities: [60] Express Endpoint, MSI 00
Capabilities: [84] Vendor Specific Information: Len=4c <?>
Capabilities: [100] Advanced Error Reporting
Capabilities: [12c] Virtual Channel
Capabilities: [148] Device Serial Number 00-00-00-00-10-ec-81-68
Capabilities: [154] Power Budgeting <?>
Kernel driver in use: r8169
Kernel modules: r8169
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Attachment added: "lspci-vv.txt"
https://bugs.launchpad.net/bugs/1906655/+attachment/5440611/+files/lspci-vv.txt
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https://bugs.launchpad.net/bugs/1906655
Title:
Ethernet interface broken (Flags mismatch irq) after upgrading to
kernel 5.8.0-31
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