Thank you Ben for your review!
I did move back to non pae kernel - same issue. If you check full logs (dmesg.1) from my previous email, you will see a lot more "task blocked" not just for ping. And it does indeed block my wifi connection restoration after resume, but it also block all windows from moving (unable to use mouse to move it, but mouse works). It is probably major kernel issue like video bug I mentioned before. Keep in mind debian 9, kernel linux-image-4.19.0-14-686-pae the only one had this issue, version below and above (14) works fine with suspend / resume.
Here are new logs, for non pae kernel.
Jun 6 10:25:52 m3n kernel: [ 605.556770] INFO: task nmbd:714 blocked for more than 120 seconds.
Jun 6 10:25:52 m3n kernel: [ 605.556783] Tainted: G S 5.10.0-7-686 #1 Debian 5.10.40-1
Jun 6 10:25:52 m3n kernel: [ 605.556786] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 6 10:25:52 m3n kernel: [ 605.556790] task:nmbd state:D stack: 0 pid: 714 ppid: 1 flags:0x00000000
Jun 6 10:25:52 m3n kernel: [ 605.556798] Call Trace:
Jun 6 10:25:52 m3n kernel: [ 605.556813] __schedule+0x24c/0x8f0
Jun 6 10:25:52 m3n kernel: [ 605.556820] schedule+0x42/0xb0
Jun 6 10:25:52 m3n kernel: [ 605.556825] schedule_preempt_disabled+0xd/0x10
Jun 6 10:25:52 m3n kernel: [ 605.556829] __mutex_lock.constprop.0+0x10a/0x430
Jun 6 10:25:52 m3n kernel: [ 605.556835] __mutex_lock_slowpath+0x12/0x20
Jun 6 10:25:52 m3n kernel: [ 605.556839] mutex_lock+0x2f/0x40
Jun 6 10:25:52 m3n kernel: [ 605.556847] __netlink_dump_start+0xa1/0x2f0
Jun 6 10:25:52 m3n kernel: [ 605.556855] rtnetlink_rcv_msg+0x242/0x370
Jun 6 10:25:52 m3n kernel: [ 605.556860] ? rtnl_fill_ifinfo+0x1060/0x1060
Jun 6 10:25:52 m3n kernel: [ 605.556865] ? rtnl_fill_ifinfo+0x1060/0x1060
Jun 6 10:25:52 m3n kernel: [ 605.556869] ? rtnl_calcit.isra.0+0x100/0x100
Jun 6 10:25:52 m3n kernel: [ 605.556873] netlink_rcv_skb+0x43/0xe0
Jun 6 10:25:52 m3n kernel: [ 605.556879] rtnetlink_rcv+0x12/0x20
Jun 6 10:25:52 m3n kernel: [ 605.556883] netlink_unicast+0x1dd/0x2e0
Jun 6 10:25:52 m3n kernel: [ 605.556888] netlink_sendmsg+0x256/0x420
Jun 6 10:25:52 m3n kernel: [ 605.556894] ? netlink_unicast+0x2e0/0x2e0
Jun 6 10:25:52 m3n kernel: [ 605.556899] sock_sendmsg+0x5c/0x60
Jun 6 10:25:52 m3n kernel: [ 605.556903] __sys_sendto+0xe6/0x120
Jun 6 10:25:52 m3n kernel: [ 605.556912] ? alloc_file+0x71/0xf0
Jun 6 10:25:52 m3n kernel: [ 605.556916] ? alloc_file_pseudo+0x88/0xf0
Jun 6 10:25:52 m3n kernel: [ 605.556923] ? fd_install+0x21/0x30
Jun 6 10:25:52 m3n kernel: [ 605.556928] __ia32_sys_socketcall+0x329/0x350
Jun 6 10:25:52 m3n kernel: [ 605.556937] __do_fast_syscall_32+0x45/0x80
Jun 6 10:25:52 m3n kernel: [ 605.556941] do_fast_syscall_32+0x29/0x60
Jun 6 10:25:52 m3n kernel: [ 605.556945] do_SYSENTER_32+0x15/0x20
Jun 6 10:25:52 m3n kernel: [ 605.556950] entry_SYSENTER_32+0x9f/0xf2
Jun 6 10:25:52 m3n kernel: [ 605.556954] EIP: 0xb7faf559
Jun 6 10:25:52 m3n kernel: [ 605.556958] EAX: ffffffda EBX: 0000000b ECX: bfa30df4 EDX: 00000000
Jun 6 10:25:52 m3n kernel: [ 605.556962] ESI: 00000000 EDI: bfa31f68 EBP: bfa31ee8 ESP: bfa30de0
Jun 6 10:25:52 m3n kernel: [ 605.556967] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000286
Jun 6 10:25:52 m3n kernel: [ 605.557005] INFO: task Qt bearer threa:1643 blocked for more than 120 seconds.