On Fri, Oct 16, 2020 at 03:05:09AM -0000, Kai-Heng Feng wrote:
> Can you please test this kernel:
> https://people.canonical.com/~khfeng/lp1896576/

Thanks for the kernel!  Still seeing this, unfortunately:

kernel: ------------[ cut here ]------------
kernel: NETDEV WATCHDOG: enp5s0 (r8169): transmit queue 0 timed out
kernel: WARNING: CPU: 8 PID: 0 at net/sched/sch_generic.c:442 dev_watchdog+0x25e/0x270
kernel: Modules linked in: nft_compat nft_counter nft_chain_nat nf_tables nfnetlink ipt_REJECT nf_reject_ipv4 xt_conntrack xt_MASQUERADE xt_CHECKSUM xt_comment xt_tcpudp iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 bpfilter >
kernel:  bridge stp llc arp_tables parport_pc ppdev lp parport drm ip_tables x_tables autofs4 btrfs blake2b_generic xor zstd_compress raid6_pq libcrc32c dm_crypt hid_logitech_hidpp hid_microsoft hid_logitech_dj ff_memless hid_generic usbhid hid crct10dif_p>
kernel: CPU: 8 PID: 0 Comm: swapper/8 Tainted: P           OE     5.6.0-2030-oem #30~lp1896576
kernel: Hardware name: Gigabyte Technology Co., Ltd. B450M DS3H/B450M DS3H-CF, BIOS F4 01/25/2019
kernel: RIP: 0010:dev_watchdog+0x25e/0x270
kernel: Code: 85 c0 75 e5 eb 9c 4c 89 ff c6 05 1f a5 e7 00 01 e8 a7 00 fb ff 44 89 e9 4c 89 fe 48 c7 c7 f0 3b 07 9e 48 89 c2 e8 57 95 6e ff <0f> 0b e9 7a ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
kernel: RSP: 0018:ffffb0eb40344e30 EFLAGS: 00010286
kernel: RAX: 0000000000000000 RBX: ffff89ae4bd0f200 RCX: 0000000000000007
kernel: RDX: 0000000000000007 RSI: 0000000000000096 RDI: ffff89ae4f019800
kernel: RBP: ffffb0eb40344e60 R08: 0000000000000545 R09: 0000000000000004
kernel: R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
kernel: R13: 0000000000000000 R14: ffff89ae4a660480 R15: ffff89ae4a660000
kernel: FS:  0000000000000000(0000) GS:ffff89ae4f000000(0000) knlGS:0000000000000000
kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 0000562e21d43b88 CR3: 000000023960a000 CR4: 00000000003406e0
kernel: Call Trace:
kernel:  <IRQ>
kernel:  ? pfifo_fast_enqueue+0x150/0x150
kernel:  call_timer_fn+0x32/0x130
kernel:  __run_timers.part.0+0x180/0x280
kernel:  ? timerqueue_add+0x9b/0xb0
kernel:  ? enqueue_hrtimer+0x3d/0x90
kernel:  ? ktime_get+0x3e/0xa0
kernel:  run_timer_softirq+0x2a/0x50
kernel:  __do_softirq+0xe1/0x2d6
kernel:  ? hrtimer_interrupt+0x13b/0x220
kernel:  irq_exit+0xae/0xb0
kernel:  smp_apic_timer_interrupt+0x7b/0x140
kernel:  apic_timer_interrupt+0xf/0x20
kernel:  </IRQ>
kernel: RIP: 0010:cpuidle_enter_state+0xca/0x3e0
kernel: Code: ff e8 fa 69 7e ff 80 7d c7 00 74 17 9c 58 0f 1f 44 00 00 f6 c4 02 0f 85 ea 02 00 00 31 ff e8 7d ed 84 ff fb 66 0f 1f 44 00 00 <45> 85 e4 0f 88 3f 02 00 00 49 63 d4 4c 8b 7d d0 4c 2b 7d c8 48 8d
kernel: RSP: 0018:ffffb0eb40167e38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
kernel: RAX: ffff89ae4f02ce00 RBX: ffff89ae3b54f800 RCX: 000000000000001f
kernel: RDX: 0000000000000000 RSI: 00000000239f541c RDI: 0000000000000000
kernel: RBP: ffffb0eb40167e78 R08: 000000090b4aca5a R09: 0000000000000e17
kernel: R10: ffff89ae4f02bac4 R11: ffff89ae4f02baa4 R12: 0000000000000002
kernel: R13: ffffffff9e378700 R14: 0000000000000002 R15: ffff89ae3b54f800
kernel:  ? cpuidle_enter_state+0xa6/0x3e0
kernel:  cpuidle_enter+0x2e/0x40
kernel:  call_cpuidle+0x23/0x40
kernel:  do_idle+0x1e7/0x280
kernel:  cpu_startup_entry+0x20/0x30
kernel:  start_secondary+0x167/0x1c0
kernel:  secondary_startup_64+0xa4/0xb0
kernel: ---[ end trace aa1f3700fccaa705 ]---