Probably you need to hack BIOS code to keep monitoring clkreq# as an interrupt.If not possible,I believe you can capture it by the Scope.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1874464 Title: NETDEV WATCHDOG: enp5s0 (r8169): transmit queue 0 timed out Status in linux package in Ubuntu: Confirmed Status in linux source package in Focal: Incomplete Status in linux source package in Groovy: Confirmed Bug description: Running focal on a desktop, I accidentally clicked "Enable networking" in nm-applet, disabling my networking. When I clicked it again to reenable it, my networking did not return. After unsuccessfully poking at it for a while, I rebooted and saw the below (and still no networking). `rmmod r8169; modprobe r8169` had no (apparent) effect, nor did further reboots. I rebooted onto two different kernels, both exhibited the same behaviour: 5.4.0-21-generic, 5.4.0-26-generic. I was finally only able to restore networking by _rebooting into Windows_ and then rebooting back into Ubuntu. (My supposition is that NetworkManager/the kernel set *waves hands* something on the network card that persists across boots when it was disabled, and that wasn't correctly unset when I reenabled networking (or on following boots), but Windows _does_ correctly handle that case on boot, and reset it to a working state.) Apr 23 10:07:43 surprise kernel: ------------[ cut here ]------------ Apr 23 10:07:43 surprise kernel: NETDEV WATCHDOG: enp5s0 (r8169): transmit queue 0 timed out Apr 23 10:07:43 surprise kernel: WARNING: CPU: 9 PID: 0 at net/sched/sch_generic.c:447 dev_watchdog+0x258/0x260 Apr 23 10:07:43 surprise kernel: Modules linked in: zfs(PO) zunicode(PO) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) zlua(PO) xt_comment dummy xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_> Apr 23 10:07:43 surprise kernel: autofs4 btrfs xor zstd_compress raid6_pq libcrc32c dm_crypt hid_microsoft ff_memless hid_logitech_hidpp hid_logitech_dj hid_generic usbhid hid nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) crct10dif_pclmul crc32_pclmul ghash_clmulni_intel drm_km> Apr 23 10:07:43 surprise kernel: CPU: 9 PID: 0 Comm: swapper/9 Tainted: P OE 5.4.0-26-generic #30-Ubuntu Apr 23 10:07:43 surprise kernel: Hardware name: Gigabyte Technology Co., Ltd. B450M DS3H/B450M DS3H-CF, BIOS F4 01/25/2019 Apr 23 10:07:43 surprise kernel: RIP: 0010:dev_watchdog+0x258/0x260 Apr 23 10:07:43 surprise kernel: Code: 85 c0 75 e5 eb 9f 4c 89 ff c6 05 bf 06 e8 00 01 e8 6d bb fa ff 44 89 e9 4c 89 fe 48 c7 c7 50 6d a3 b4 48 89 c2 e8 83 3f 71 ff <0f> 0b eb 80 0f 1f 40 00 0f 1f 44 00 00 55 48 89 e5 41 57 49 89 d7 Apr 23 10:07:43 surprise kernel: RSP: 0018:ffffa90d40378e30 EFLAGS: 00010286 Apr 23 10:07:43 surprise kernel: RAX: 0000000000000000 RBX: ffff8a7578b00400 RCX: 0000000000000000 Apr 23 10:07:43 surprise kernel: RDX: ffff8a758ee67740 RSI: ffff8a758ee578c8 RDI: 0000000000000300 Apr 23 10:07:43 surprise kernel: RBP: ffffa90d40378e60 R08: ffff8a758ee578c8 R09: 0000000000000004 Apr 23 10:07:43 surprise kernel: R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 Apr 23 10:07:43 surprise kernel: R13: 0000000000000000 R14: ffff8a758cadc480 R15: ffff8a758cadc000 Apr 23 10:07:43 surprise kernel: FS: 0000000000000000(0000) GS:ffff8a758ee40000(0000) knlGS:0000000000000000 Apr 23 10:07:43 surprise kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 23 10:07:43 surprise kernel: CR2: 00007f4d2000d5eb CR3: 00000003fcfe2000 CR4: 00000000003406e0 Apr 23 10:07:43 surprise kernel: Call Trace: Apr 23 10:07:43 surprise kernel: <IRQ> Apr 23 10:07:43 surprise kernel: ? pfifo_fast_enqueue+0x150/0x150 Apr 23 10:07:43 surprise kernel: call_timer_fn+0x32/0x130 Apr 23 10:07:43 surprise kernel: __run_timers.part.0+0x180/0x280 Apr 23 10:07:43 surprise kernel: ? tick_sched_handle+0x33/0x60 Apr 23 10:07:43 surprise kernel: ? tick_sched_timer+0x3d/0x80 Apr 23 10:07:43 surprise kernel: ? ktime_get+0x3e/0xa0 Apr 23 10:07:43 surprise kernel: run_timer_softirq+0x2a/0x50 Apr 23 10:07:43 surprise kernel: __do_softirq+0xe1/0x2d6 Apr 23 10:07:43 surprise kernel: ? hrtimer_interrupt+0x13b/0x220 Apr 23 10:07:43 surprise kernel: irq_exit+0xae/0xb0 Apr 23 10:07:43 surprise kernel: smp_apic_timer_interrupt+0x7b/0x140 Apr 23 10:07:43 surprise kernel: apic_timer_interrupt+0xf/0x20 Apr 23 10:07:43 surprise kernel: </IRQ> Apr 23 10:07:43 surprise kernel: RIP: 0010:cpuidle_enter_state+0xc5/0x450 Apr 23 10:07:43 surprise kernel: Code: ff e8 df 0d 81 ff 80 7d c7 00 74 17 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 65 03 00 00 31 ff e8 32 7a 87 ff fb 66 0f 1f 44 00 00 <45> 85 ed 0f 88 8f 02 00 00 49 63 cd 4c 8b 7d d0 4c 2b 7d c8 48 8d Apr 23 10:07:43 surprise kernel: RSP: 0018:ffffa90d4016fe38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 Apr 23 10:07:43 surprise kernel: RAX: ffff8a758ee6ad00 RBX: ffffffffb4d69160 RCX: 000000000000001f Apr 23 10:07:43 surprise kernel: RDX: 0000000000000000 RSI: 00000000239f52d0 RDI: 0000000000000000 Apr 23 10:07:43 surprise kernel: RBP: ffffa90d4016fe78 R08: 0000011276ac078f R09: 00000000000148ba Apr 23 10:07:43 surprise kernel: R10: ffff8a758ee69a00 R11: ffff8a758ee699e0 R12: ffff8a757a318000 Apr 23 10:07:43 surprise kernel: R13: 0000000000000002 R14: 0000000000000002 R15: ffff8a757a318000 Apr 23 10:07:43 surprise kernel: ? cpuidle_enter_state+0xa1/0x450 Apr 23 10:07:43 surprise kernel: cpuidle_enter+0x2e/0x40 Apr 23 10:07:43 surprise kernel: call_cpuidle+0x23/0x40 Apr 23 10:07:43 surprise kernel: do_idle+0x1dd/0x270 Apr 23 10:07:43 surprise kernel: cpu_startup_entry+0x20/0x30 Apr 23 10:07:43 surprise kernel: start_secondary+0x167/0x1c0 Apr 23 10:07:43 surprise kernel: secondary_startup_64+0xa4/0xb0 Apr 23 10:07:43 surprise kernel: ---[ end trace cf93a9794ecfd126 ]--- ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-generic 5.4.0.26.32 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Uname: Linux 5.4.0-26-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: i3 Date: Thu Apr 23 10:38:05 2020 InstallationDate: Installed on 2019-05-07 (351 days ago) InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210) MachineType: Gigabyte Technology Co., Ltd. B450M DS3H ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-26-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash resume=UUID=73909634-a75d-42c9-8f66-a69138690756 vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-26-generic N/A linux-backports-modules-5.4.0-26-generic N/A linux-firmware 1.187 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to focal on 2019-11-15 (159 days ago) dmi.bios.date: 01/25/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F4 dmi.board.asset.tag: Default string dmi.board.name: B450M DS3H-CF dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF4:bd01/25/2019:svnGigabyteTechnologyCo.,Ltd.:pnB450MDS3H:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB450MDS3H-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: Default string dmi.product.name: B450M DS3H dmi.product.sku: Default string dmi.product.version: Default string dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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