kernel warning about 'watchdog' kills networking

[James D. Amberger]

Linux 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Linux Mint 18 Sarah Cinnamon BETA

This hits at about the same time on every boot. I have three network interfaces on this thing and none of them work. DHCPDISCOVER times out regardless of which interface and a variety of drivers I've tried. I am assuming this kernel message has something to do with it but this is as far as I can go debugging it myself.

[ 85.870765] ------------[ cut here ]------------
[ 85.870805] WARNING: CPU: 6 PID: 0 at /build/linux-Ay7j_C/linux-4.4.0/net/sched/sch_generic.c:303 dev_watchdog+0x237/0x240()
[ 85.870812] NETDEV WATCHDOG: enx52c573b78076 (rndis_host): transmit queue 0 timed out
[ 85.870817] Modules linked in: bnep appletalk ipx p8023 p8022 psnap llc binfmt_misc input_leds rndis_host btusb cdc_ether btrtl usbnet kvm_amd mii btbcm btintel kvm bluetooth snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper snd_hda_codec_realtek snd_hda_codec_generic ablk_helper snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep cryptd snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device fam15h_power snd_timer snd soundcore k10temp serio_raw edac_mce_amd edac_core i2c_piix4 8250_fintek shpchp tpm_infineon mac_hid arc4 rtl8192ce rtl_pci rtl8192c_common rtlwifi mac80211 cfg80211 parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_mirror dm_region_hash dm_log uas usb_storage hid_generic usbhid hid pata_acpi nouveau
[ 85.870931] mxm_wmi video i2c_algo_bit ttm drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt e1000 fb_sys_fops r8168(OE) drm pata_atiixp ahci libahci fjes wmi
[ 85.870970] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G OE 4.4.0-21-generic #37-Ubuntu
[ 85.870979] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./990FXA-UD3 R5, BIOS F2 04/01/2015
[ 85.870983] 0000000000000286 0ac494321b2d7f1a ffff88022ed83d98 ffffffff813e93c3
[ 85.870998] ffff88022ed83de0 ffffffff81d622b8 ffff88022ed83dd0 ffffffff81080f62
[ 85.871008] 0000000000000000 ffff8802214aba80 0000000000000006 ffff8800c9504000
[ 85.871017] Call Trace:
[ 85.871034] <IRQ> [<ffffffff813e93c3>] dump_stack+0x63/0x90
[ 85.871047] [<ffffffff81080f62>] warn_slowpath_common+0x82/0xc0
[ 85.871051] [<ffffffff81080ffc>] warn_slowpath_fmt+0x5c/0x80
[ 85.871059] [<ffffffff81741217>] dev_watchdog+0x237/0x240
[ 85.871069] [<ffffffff81740fe0>] ? qdisc_rcu_free+0x40/0x40
[ 85.871084] [<ffffffff810ec345>] call_timer_fn+0x35/0x120
[ 85.871092] [<ffffffff81740fe0>] ? qdisc_rcu_free+0x40/0x40
[ 85.871098] [<ffffffff810eccfa>] run_timer_softirq+0x23a/0x2f0
[ 85.871103] [<ffffffff810859a1>] __do_softirq+0x101/0x290
[ 85.871116] [<ffffffff81085ca3>] irq_exit+0xa3/0xb0
[ 85.871122] [<ffffffff81826fa2>] smp_apic_timer_interrupt+0x42/0x50
[ 85.871133] [<ffffffff81825262>] apic_timer_interrupt+0x82/0x90
[ 85.871138] <EOI> [<ffffffff816bb9f1>] ? cpuidle_enter_state+0x111/0x2b0
[ 85.871147] [<ffffffff816bbbc7>] cpuidle_enter+0x17/0x20
[ 85.871153] [<ffffffff810c3d52>] call_cpuidle+0x32/0x60
[ 85.871156] [<ffffffff816bbba3>] ? cpuidle_select+0x13/0x20
[ 85.871161] [<ffffffff810c4010>] cpu_startup_entry+0x290/0x350
[ 85.871166] [<ffffffff810516f4>] start_secondary+0x154/0x190
[ 85.871175] ---[ end trace 3764bf52c2ae1ced ]---

[James D. Amberger (jim-amberger)]

I can report that this no longer occurs when I remove the PCI-Ex1 wireless NIC, which as best I can tell is a Realtek 8192.