Die, Notwork-Manager, die!

So, genug ist genug: seit mehreren Wochen crasht Network-Manager, woraufhin dann das Netzwerk nicht nur nicht mehr tut, sondern Prozesse, die Namensauflösung probieren, einfach hängen; es hilft nur noch ein Reboot, und das mittlerweile alle <48 Stunden.

Ja, das Update von Ubuntu 16.04 LTS auf 18.04 LTS wäre eine der Sachen, die ich bei funktionierenden Zeitreisen rückgängig machen würde.

Der Backtrace ist ziemlich eindeutig, Network-Manager schießt sich selbt ins Knie und zieht dabei augenscheinlich Kernelkomponenten mit in den Abgrund:

[Fr Jun  5 20:45:49 2020] microcode: microcode updated early to revision 0xd6, date = 2019-10-03
[Fr Jun  5 20:45:49 2020] Linux version 5.3.0-56-generic (buildd@lcy01-amd64-017) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #50~18.04.1-Ubuntu SMP Wed May 27 08:52:12 UTC 2020 (Ubuntu 5.3.0-56.50~18.04.1-generic 5.3.18)
[Fr Jun  5 20:45:49 2020] Command line: BOOT_IMAGE=/boot/vmlinuz-5.3.0-56-generic root=UUID=f433626a-8921-45b3-99a5-c4b78f0c24c6 ro quiet splash vt.handoff=1
[Fr Jun  5 20:45:49 2020] KERNEL supported cpus:
[Fr Jun  5 20:45:49 2020]   Intel GenuineIntel
[Fr Jun  5 20:45:49 2020]   AMD AuthenticAMD
[Fr Jun  5 20:45:49 2020]   Hygon HygonGenuine
[Fr Jun  5 20:45:49 2020]   Centaur CentaurHauls
[Fr Jun  5 20:45:49 2020]   zhaoxin   Shanghai  
[…]
[Sa Jun  6 20:45:19 2020] r8152 1-3:1.0 enxa0cec8052d03: carrier off
[Sa Jun  6 20:45:20 2020] r8152 1-3:1.0 enxa0cec8052d03: carrier on
[Sa Jun  6 20:45:23 2020] r8152 1-3:1.0 enxa0cec8052d03: carrier off
[Sa Jun  6 20:45:25 2020] r8152 1-3:1.0 enxa0cec8052d03: carrier on
[Sa Jun  6 21:42:07 2020] INFO: task NetworkManager:1241 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] NetworkManager  D    0  1241      1 0x00000000
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:42:07 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:42:07 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:42:07 2020]  rtnl_lock+0x15/0x20
[Sa Jun  6 21:42:07 2020]  nl80211_dump_scan+0x34/0x700 [cfg80211]
[Sa Jun  6 21:42:07 2020]  ? __kmalloc_reserve.isra.56+0x31/0x90
[Sa Jun  6 21:42:07 2020]  genl_lock_dumpit+0x33/0x50
[Sa Jun  6 21:42:07 2020]  netlink_dump+0x173/0x3a0
[Sa Jun  6 21:42:07 2020]  __netlink_dump_start+0x178/0x1d0
[Sa Jun  6 21:42:07 2020]  genl_family_rcv_msg+0x31a/0x490
[Sa Jun  6 21:42:07 2020]  ? __free_pages+0x1f/0x30
[Sa Jun  6 21:42:07 2020]  ? genl_lock_dumpit+0x50/0x50
[Sa Jun  6 21:42:07 2020]  ? genl_lock_done+0x60/0x60
[Sa Jun  6 21:42:07 2020]  ? genl_unlock+0x20/0x20
[Sa Jun  6 21:42:07 2020]  ? do_sys_poll+0x3f9/0x590
[Sa Jun  6 21:42:07 2020]  genl_rcv_msg+0x4c/0x90
[Sa Jun  6 21:42:07 2020]  ? genl_family_rcv_msg+0x490/0x490
[Sa Jun  6 21:42:07 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:42:07 2020]  genl_rcv+0x28/0x40
[Sa Jun  6 21:42:07 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:42:07 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:42:07 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:42:07 2020]  ____sys_sendmsg+0x200/0x280
[Sa Jun  6 21:42:07 2020]  ___sys_sendmsg+0x88/0xd0
[Sa Jun  6 21:42:07 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:42:07 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:42:07 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:42:07 2020]  ? ep_poll+0x2cc/0x450
[Sa Jun  6 21:42:07 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:42:07 2020]  __sys_sendmsg+0x63/0xa0
[Sa Jun  6 21:42:07 2020]  ? __sys_sendmsg+0x63/0xa0
[Sa Jun  6 21:42:07 2020]  __x64_sys_sendmsg+0x1f/0x30
[Sa Jun  6 21:42:07 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:42:07 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:42:07 2020] RIP: 0033:0x7ff290f96607
[Sa Jun  6 21:42:07 2020] Code: Bad RIP value.
[Sa Jun  6 21:42:07 2020] RSP: 002b:00007ffdd58ba030 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
[Sa Jun  6 21:42:07 2020] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00007ff290f96607
[Sa Jun  6 21:42:07 2020] RDX: 0000000000000000 RSI: 00007ffdd58ba090 RDI: 000000000000000f
[Sa Jun  6 21:42:07 2020] RBP: 00007ffdd58ba090 R08: 0000000000000000 R09: 00007ff290f7ec40
[Sa Jun  6 21:42:07 2020] R10: 0000000000000007 R11: 0000000000000293 R12: 0000000000000000
[Sa Jun  6 21:42:07 2020] R13: 00007ffdd58ba090 R14: 00007ffdd58ba1c0 R15: 00000000fffffff4
[Sa Jun  6 21:42:07 2020] INFO: task lldpd:1449 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] lldpd           D    0  1449   1401 0x00000320
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  rpm_resume+0x108/0x780
[Sa Jun  6 21:42:07 2020]  ? wait_woken+0x80/0x80
[Sa Jun  6 21:42:07 2020]  rpm_resume+0x579/0x780
[Sa Jun  6 21:42:07 2020]  ? copyout+0x26/0x30
[Sa Jun  6 21:42:07 2020]  ? _copy_to_iter+0xa0/0x450
[Sa Jun  6 21:42:07 2020]  __pm_runtime_resume+0x4e/0x80
[Sa Jun  6 21:42:07 2020]  usb_autopm_get_interface+0x20/0x50
[Sa Jun  6 21:42:07 2020]  rtl8152_get_link_ksettings+0x2e/0x80 [r8152]
[Sa Jun  6 21:42:07 2020]  ethtool_get_link_ksettings+0xee/0x160
[Sa Jun  6 21:42:07 2020]  dev_ethtool+0x65d/0x28a0
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_xtra+0x1c2/0x580
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? inet_ioctl+0x1ce/0x200
[Sa Jun  6 21:42:07 2020]  ? netdev_run_todo+0x60/0x300
[Sa Jun  6 21:42:07 2020]  dev_ioctl+0xc2/0x5a0
[Sa Jun  6 21:42:07 2020]  ? dev_ioctl+0xc2/0x5a0
[Sa Jun  6 21:42:07 2020]  sock_do_ioctl+0xae/0x150
[Sa Jun  6 21:42:07 2020]  sock_ioctl+0x34f/0x3c0
[Sa Jun  6 21:42:07 2020]  ? sock_ioctl+0x34f/0x3c0
[Sa Jun  6 21:42:07 2020]  do_vfs_ioctl+0xa9/0x640
[Sa Jun  6 21:42:07 2020]  ? dlci_ioctl_set+0x30/0x30
[Sa Jun  6 21:42:07 2020]  ? do_vfs_ioctl+0xa9/0x640
[Sa Jun  6 21:42:07 2020]  ? __secure_computing+0x3f/0xd0
[Sa Jun  6 21:42:07 2020]  ksys_ioctl+0x75/0x80
[Sa Jun  6 21:42:07 2020]  __x64_sys_ioctl+0x1a/0x20
[Sa Jun  6 21:42:07 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:42:07 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:42:07 2020] RIP: 0033:0x7fa23ed615d7
[Sa Jun  6 21:42:07 2020] Code: Bad RIP value.
[Sa Jun  6 21:42:07 2020] RSP: 002b:00007ffe789840e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[Sa Jun  6 21:42:07 2020] RAX: ffffffffffffffda RBX: 0000563aa2c51b60 RCX: 00007fa23ed615d7
[Sa Jun  6 21:42:07 2020] RDX: 00007ffe78984100 RSI: 0000000000008946 RDI: 0000000000000006
[Sa Jun  6 21:42:07 2020] RBP: 00007ffe78984e40 R08: 0000000000000006 R09: 0000000000000001
[Sa Jun  6 21:42:07 2020] R10: 00007ffe789843dc R11: 0000000000000246 R12: 00007ffe78984100
[Sa Jun  6 21:42:07 2020] R13: 0000563aa2c51bac R14: 00007ffe789847e0 R15: 0000563aa2c47a70
[Sa Jun  6 21:42:07 2020] INFO: task dnsmasq:1806 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] dnsmasq         D    0  1806      1 0x00000000
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:42:07 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:42:07 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:42:07 2020]  __netlink_dump_start+0x51/0x1d0
[Sa Jun  6 21:42:07 2020]  ? inet6_dump_ifmcaddr+0x20/0x20
[Sa Jun  6 21:42:07 2020]  rtnetlink_rcv_msg+0x200/0x340
[Sa Jun  6 21:42:07 2020]  ? inet6_dump_ifmcaddr+0x20/0x20
[Sa Jun  6 21:42:07 2020]  ? rtnl_calcit.isra.30+0x120/0x120
[Sa Jun  6 21:42:07 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:42:07 2020]  rtnetlink_rcv+0x15/0x20
[Sa Jun  6 21:42:07 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:42:07 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:42:07 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:42:07 2020]  __sys_sendto+0x13f/0x180
[Sa Jun  6 21:42:07 2020]  ? alloc_file_pseudo+0xa5/0x100
[Sa Jun  6 21:42:07 2020]  ? fd_install+0x25/0x30
[Sa Jun  6 21:42:07 2020]  ? __sys_socket+0x98/0xf0
[Sa Jun  6 21:42:07 2020]  __x64_sys_sendto+0x28/0x30
[Sa Jun  6 21:42:07 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:42:07 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:42:07 2020] RIP: 0033:0x7f670fd33da7
[Sa Jun  6 21:42:07 2020] Code: Bad RIP value.
[Sa Jun  6 21:42:07 2020] RSP: 002b:00007ffffe8a1218 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[Sa Jun  6 21:42:07 2020] RAX: ffffffffffffffda RBX: 0000000000000305 RCX: 00007f670fd33da7
[Sa Jun  6 21:42:07 2020] RDX: 0000000000000014 RSI: 00007ffffe8a1250 RDI: 0000000000000004
[Sa Jun  6 21:42:07 2020] RBP: 0000000000000000 R08: 00007ffffe8a1244 R09: 000000000000000c
[Sa Jun  6 21:42:07 2020] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
[Sa Jun  6 21:42:07 2020] R13: 00007ffffe8a1250 R14: 00007ffffe8a1244 R15: 00007f6710f78740
[Sa Jun  6 21:42:07 2020] INFO: task ThreadPoolForeg:19268 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] ThreadPoolForeg D    0 19268   5402 0x00000000
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  ? attach_task+0x43/0x50
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:42:07 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:42:07 2020]  __netlink_dump_start+0x51/0x1d0
[Sa Jun  6 21:42:07 2020]  ? rtnl_xdp_prog_skb+0x60/0x60
[Sa Jun  6 21:42:07 2020]  rtnetlink_rcv_msg+0x200/0x340
[Sa Jun  6 21:42:07 2020]  ? rtnl_xdp_prog_skb+0x60/0x60
[Sa Jun  6 21:42:07 2020]  ? rtnl_calcit.isra.30+0x120/0x120
[Sa Jun  6 21:42:07 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:42:07 2020]  rtnetlink_rcv+0x15/0x20
[Sa Jun  6 21:42:07 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:42:07 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:42:07 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:42:07 2020]  __sys_sendto+0x13f/0x180
[Sa Jun  6 21:42:07 2020]  ? fd_install+0x25/0x30
[Sa Jun  6 21:42:07 2020]  ? __sys_socket+0x98/0xf0
[Sa Jun  6 21:42:07 2020]  __x64_sys_sendto+0x28/0x30
[Sa Jun  6 21:42:07 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:42:07 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:42:07 2020] RIP: 0033:0x7f0b3a874dfa
[Sa Jun  6 21:42:07 2020] Code: Bad RIP value.
[Sa Jun  6 21:42:07 2020] RSP: 002b:00007f0b29a93be0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
[Sa Jun  6 21:42:07 2020] RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 00007f0b3a874dfa
[Sa Jun  6 21:42:07 2020] RDX: 0000000000000014 RSI: 00007f0b29a94d20 RDI: 0000000000000032
[Sa Jun  6 21:42:07 2020] RBP: 0000000000000000 R08: 00007f0b29a94cc4 R09: 000000000000000c
[Sa Jun  6 21:42:07 2020] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0b29a94d20
[Sa Jun  6 21:42:07 2020] R13: 0000000000000014 R14: 0000000000000000 R15: 00007f0b29a94cc4
[Sa Jun  6 21:42:07 2020] INFO: task kworker/1:0:17387 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] kworker/1:0     D    0 17387      2 0x80004000
[Sa Jun  6 21:42:07 2020] Workqueue: ipv6_addrconf addrconf_verify_work
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:42:07 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:42:07 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:42:07 2020]  rtnl_lock+0x15/0x20
[Sa Jun  6 21:42:07 2020]  addrconf_verify_work+0xe/0x20
[Sa Jun  6 21:42:07 2020]  process_one_work+0x1fd/0x3f0
[Sa Jun  6 21:42:07 2020]  worker_thread+0x34/0x410
[Sa Jun  6 21:42:07 2020]  kthread+0x121/0x140
[Sa Jun  6 21:42:07 2020]  ? process_one_work+0x3f0/0x3f0
[Sa Jun  6 21:42:07 2020]  ? kthread_park+0xb0/0xb0
[Sa Jun  6 21:42:07 2020]  ret_from_fork+0x35/0x40
[Sa Jun  6 21:42:07 2020] INFO: task kworker/0:1:20678 blocked for more than 120 seconds.
[Sa Jun  6 21:42:07 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:42:07 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:42:07 2020] kworker/0:1     D    0 20678      2 0x80004000
[Sa Jun  6 21:42:07 2020] Workqueue: events rtl_work_func_t [r8152]
[Sa Jun  6 21:42:07 2020] Call Trace:
[Sa Jun  6 21:42:07 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:42:07 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:42:07 2020]  rpm_resume+0x108/0x780
[Sa Jun  6 21:42:07 2020]  ? update_load_avg+0x17d/0x680
[Sa Jun  6 21:42:07 2020]  ? wait_woken+0x80/0x80
[Sa Jun  6 21:42:07 2020]  rpm_resume+0x579/0x780
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:42:07 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:42:07 2020]  __pm_runtime_resume+0x4e/0x80
[Sa Jun  6 21:42:07 2020]  usb_autopm_get_interface+0x20/0x50
[Sa Jun  6 21:42:07 2020]  rtl_work_func_t+0x70/0x2a7 [r8152]
[Sa Jun  6 21:42:07 2020]  process_one_work+0x1fd/0x3f0
[Sa Jun  6 21:42:07 2020]  worker_thread+0x34/0x410
[Sa Jun  6 21:42:07 2020]  kthread+0x121/0x140
[Sa Jun  6 21:42:07 2020]  ? process_one_work+0x3f0/0x3f0
[Sa Jun  6 21:42:07 2020]  ? kthread_park+0xb0/0xb0
[Sa Jun  6 21:42:07 2020]  ret_from_fork+0x35/0x40
[Sa Jun  6 21:44:08 2020] INFO: task NetworkManager:1241 blocked for more than 241 seconds.
[Sa Jun  6 21:44:08 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:44:08 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:44:08 2020] NetworkManager  D    0  1241      1 0x00000000
[Sa Jun  6 21:44:08 2020] Call Trace:
[Sa Jun  6 21:44:08 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:44:08 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:44:08 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:44:08 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:44:08 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:44:08 2020]  rtnl_lock+0x15/0x20
[Sa Jun  6 21:44:08 2020]  nl80211_dump_scan+0x34/0x700 [cfg80211]
[Sa Jun  6 21:44:08 2020]  ? __kmalloc_reserve.isra.56+0x31/0x90
[Sa Jun  6 21:44:08 2020]  genl_lock_dumpit+0x33/0x50
[Sa Jun  6 21:44:08 2020]  netlink_dump+0x173/0x3a0
[Sa Jun  6 21:44:08 2020]  __netlink_dump_start+0x178/0x1d0
[Sa Jun  6 21:44:08 2020]  genl_family_rcv_msg+0x31a/0x490
[Sa Jun  6 21:44:08 2020]  ? __free_pages+0x1f/0x30
[Sa Jun  6 21:44:08 2020]  ? genl_lock_dumpit+0x50/0x50
[Sa Jun  6 21:44:08 2020]  ? genl_lock_done+0x60/0x60
[Sa Jun  6 21:44:08 2020]  ? genl_unlock+0x20/0x20
[Sa Jun  6 21:44:08 2020]  ? do_sys_poll+0x3f9/0x590
[Sa Jun  6 21:44:08 2020]  genl_rcv_msg+0x4c/0x90
[Sa Jun  6 21:44:08 2020]  ? genl_family_rcv_msg+0x490/0x490
[Sa Jun  6 21:44:08 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:44:08 2020]  genl_rcv+0x28/0x40
[Sa Jun  6 21:44:08 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:44:08 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:44:08 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:44:08 2020]  ____sys_sendmsg+0x200/0x280
[Sa Jun  6 21:44:08 2020]  ___sys_sendmsg+0x88/0xd0
[Sa Jun  6 21:44:08 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:44:08 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:44:08 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:44:08 2020]  ? ep_poll+0x2cc/0x450
[Sa Jun  6 21:44:08 2020]  ? poll_select_finish+0x220/0x220
[Sa Jun  6 21:44:08 2020]  __sys_sendmsg+0x63/0xa0
[Sa Jun  6 21:44:08 2020]  ? __sys_sendmsg+0x63/0xa0
[Sa Jun  6 21:44:08 2020]  __x64_sys_sendmsg+0x1f/0x30
[Sa Jun  6 21:44:08 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:44:08 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:44:08 2020] RIP: 0033:0x7ff290f96607
[Sa Jun  6 21:44:08 2020] Code: Bad RIP value.
[Sa Jun  6 21:44:08 2020] RSP: 002b:00007ffdd58ba030 EFLAGS: 00000293 ORIG_RAX: 000000000000002e
[Sa Jun  6 21:44:08 2020] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00007ff290f96607
[Sa Jun  6 21:44:08 2020] RDX: 0000000000000000 RSI: 00007ffdd58ba090 RDI: 000000000000000f
[Sa Jun  6 21:44:08 2020] RBP: 00007ffdd58ba090 R08: 0000000000000000 R09: 00007ff290f7ec40
[Sa Jun  6 21:44:08 2020] R10: 0000000000000007 R11: 0000000000000293 R12: 0000000000000000
[Sa Jun  6 21:44:08 2020] R13: 00007ffdd58ba090 R14: 00007ffdd58ba1c0 R15: 00000000fffffff4
[Sa Jun  6 21:44:08 2020] INFO: task lldpd:1449 blocked for more than 241 seconds.
[Sa Jun  6 21:44:08 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:44:08 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:44:08 2020] lldpd           D    0  1449   1401 0x00000320
[Sa Jun  6 21:44:08 2020] Call Trace:
[Sa Jun  6 21:44:08 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:44:08 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:44:08 2020]  rpm_resume+0x108/0x780
[Sa Jun  6 21:44:08 2020]  ? wait_woken+0x80/0x80
[Sa Jun  6 21:44:08 2020]  rpm_resume+0x579/0x780
[Sa Jun  6 21:44:08 2020]  ? copyout+0x26/0x30
[Sa Jun  6 21:44:08 2020]  ? _copy_to_iter+0xa0/0x450
[Sa Jun  6 21:44:08 2020]  __pm_runtime_resume+0x4e/0x80
[Sa Jun  6 21:44:08 2020]  usb_autopm_get_interface+0x20/0x50
[Sa Jun  6 21:44:08 2020]  rtl8152_get_link_ksettings+0x2e/0x80 [r8152]
[Sa Jun  6 21:44:08 2020]  ethtool_get_link_ksettings+0xee/0x160
[Sa Jun  6 21:44:08 2020]  dev_ethtool+0x65d/0x28a0
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_xtra+0x1c2/0x580
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x40/0x70
[Sa Jun  6 21:44:08 2020]  ? inet_ioctl+0x1ce/0x200
[Sa Jun  6 21:44:08 2020]  ? netdev_run_todo+0x60/0x300
[Sa Jun  6 21:44:08 2020]  dev_ioctl+0xc2/0x5a0
[Sa Jun  6 21:44:08 2020]  ? dev_ioctl+0xc2/0x5a0
[Sa Jun  6 21:44:08 2020]  sock_do_ioctl+0xae/0x150
[Sa Jun  6 21:44:08 2020]  sock_ioctl+0x34f/0x3c0
[Sa Jun  6 21:44:08 2020]  ? sock_ioctl+0x34f/0x3c0
[Sa Jun  6 21:44:08 2020]  do_vfs_ioctl+0xa9/0x640
[Sa Jun  6 21:44:08 2020]  ? dlci_ioctl_set+0x30/0x30
[Sa Jun  6 21:44:08 2020]  ? do_vfs_ioctl+0xa9/0x640
[Sa Jun  6 21:44:08 2020]  ? __secure_computing+0x3f/0xd0
[Sa Jun  6 21:44:08 2020]  ksys_ioctl+0x75/0x80
[Sa Jun  6 21:44:08 2020]  __x64_sys_ioctl+0x1a/0x20
[Sa Jun  6 21:44:08 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:44:08 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:44:08 2020] RIP: 0033:0x7fa23ed615d7
[Sa Jun  6 21:44:08 2020] Code: Bad RIP value.
[Sa Jun  6 21:44:08 2020] RSP: 002b:00007ffe789840e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[Sa Jun  6 21:44:08 2020] RAX: ffffffffffffffda RBX: 0000563aa2c51b60 RCX: 00007fa23ed615d7
[Sa Jun  6 21:44:08 2020] RDX: 00007ffe78984100 RSI: 0000000000008946 RDI: 0000000000000006
[Sa Jun  6 21:44:08 2020] RBP: 00007ffe78984e40 R08: 0000000000000006 R09: 0000000000000001
[Sa Jun  6 21:44:08 2020] R10: 00007ffe789843dc R11: 0000000000000246 R12: 00007ffe78984100
[Sa Jun  6 21:44:08 2020] R13: 0000563aa2c51bac R14: 00007ffe789847e0 R15: 0000563aa2c47a70
[Sa Jun  6 21:44:08 2020] INFO: task dnsmasq:1806 blocked for more than 241 seconds.
[Sa Jun  6 21:44:08 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:44:08 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:44:08 2020] dnsmasq         D    0  1806      1 0x00000000
[Sa Jun  6 21:44:08 2020] Call Trace:
[Sa Jun  6 21:44:08 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:44:08 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:44:08 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:44:08 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:44:08 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:44:08 2020]  __netlink_dump_start+0x51/0x1d0
[Sa Jun  6 21:44:08 2020]  ? inet6_dump_ifmcaddr+0x20/0x20
[Sa Jun  6 21:44:08 2020]  rtnetlink_rcv_msg+0x200/0x340
[Sa Jun  6 21:44:08 2020]  ? inet6_dump_ifmcaddr+0x20/0x20
[Sa Jun  6 21:44:08 2020]  ? rtnl_calcit.isra.30+0x120/0x120
[Sa Jun  6 21:44:08 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:44:08 2020]  rtnetlink_rcv+0x15/0x20
[Sa Jun  6 21:44:08 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:44:08 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:44:08 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:44:08 2020]  __sys_sendto+0x13f/0x180
[Sa Jun  6 21:44:08 2020]  ? alloc_file_pseudo+0xa5/0x100
[Sa Jun  6 21:44:08 2020]  ? fd_install+0x25/0x30
[Sa Jun  6 21:44:08 2020]  ? __sys_socket+0x98/0xf0
[Sa Jun  6 21:44:08 2020]  __x64_sys_sendto+0x28/0x30
[Sa Jun  6 21:44:08 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:44:08 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:44:08 2020] RIP: 0033:0x7f670fd33da7
[Sa Jun  6 21:44:08 2020] Code: Bad RIP value.
[Sa Jun  6 21:44:08 2020] RSP: 002b:00007ffffe8a1218 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[Sa Jun  6 21:44:08 2020] RAX: ffffffffffffffda RBX: 0000000000000305 RCX: 00007f670fd33da7
[Sa Jun  6 21:44:08 2020] RDX: 0000000000000014 RSI: 00007ffffe8a1250 RDI: 0000000000000004
[Sa Jun  6 21:44:08 2020] RBP: 0000000000000000 R08: 00007ffffe8a1244 R09: 000000000000000c
[Sa Jun  6 21:44:08 2020] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
[Sa Jun  6 21:44:08 2020] R13: 00007ffffe8a1250 R14: 00007ffffe8a1244 R15: 00007f6710f78740
[Sa Jun  6 21:44:08 2020] INFO: task ThreadPoolForeg:19268 blocked for more than 241 seconds.
[Sa Jun  6 21:44:08 2020]       Not tainted 5.3.0-56-generic #50~18.04.1-Ubuntu
[Sa Jun  6 21:44:08 2020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Sa Jun  6 21:44:08 2020] ThreadPoolForeg D    0 19268   5402 0x00000000
[Sa Jun  6 21:44:08 2020] Call Trace:
[Sa Jun  6 21:44:08 2020]  __schedule+0x2a8/0x670
[Sa Jun  6 21:44:08 2020]  ? attach_task+0x43/0x50
[Sa Jun  6 21:44:08 2020]  schedule+0x33/0xa0
[Sa Jun  6 21:44:08 2020]  schedule_preempt_disabled+0xe/0x10
[Sa Jun  6 21:44:08 2020]  __mutex_lock.isra.9+0x26d/0x4e0
[Sa Jun  6 21:44:08 2020]  ? __switch_to_asm+0x34/0x70
[Sa Jun  6 21:44:08 2020]  __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  ? __mutex_lock_slowpath+0x13/0x20
[Sa Jun  6 21:44:08 2020]  mutex_lock+0x2f/0x40
[Sa Jun  6 21:44:08 2020]  __netlink_dump_start+0x51/0x1d0
[Sa Jun  6 21:44:08 2020]  ? rtnl_xdp_prog_skb+0x60/0x60
[Sa Jun  6 21:44:08 2020]  rtnetlink_rcv_msg+0x200/0x340
[Sa Jun  6 21:44:08 2020]  ? rtnl_xdp_prog_skb+0x60/0x60
[Sa Jun  6 21:44:08 2020]  ? rtnl_calcit.isra.30+0x120/0x120
[Sa Jun  6 21:44:08 2020]  netlink_rcv_skb+0x51/0x120
[Sa Jun  6 21:44:08 2020]  rtnetlink_rcv+0x15/0x20
[Sa Jun  6 21:44:08 2020]  netlink_unicast+0x1a4/0x250
[Sa Jun  6 21:44:08 2020]  netlink_sendmsg+0x2eb/0x3f0
[Sa Jun  6 21:44:08 2020]  sock_sendmsg+0x63/0x70
[Sa Jun  6 21:44:08 2020]  __sys_sendto+0x13f/0x180
[Sa Jun  6 21:44:08 2020]  ? fd_install+0x25/0x30
[Sa Jun  6 21:44:08 2020]  ? __sys_socket+0x98/0xf0
[Sa Jun  6 21:44:08 2020]  __x64_sys_sendto+0x28/0x30
[Sa Jun  6 21:44:08 2020]  do_syscall_64+0x5a/0x130
[Sa Jun  6 21:44:08 2020]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sa Jun  6 21:44:08 2020] RIP: 0033:0x7f0b3a874dfa
[Sa Jun  6 21:44:08 2020] Code: Bad RIP value.
[Sa Jun  6 21:44:08 2020] RSP: 002b:00007f0b29a93be0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
[Sa Jun  6 21:44:08 2020] RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 00007f0b3a874dfa
[Sa Jun  6 21:44:08 2020] RDX: 0000000000000014 RSI: 00007f0b29a94d20 RDI: 0000000000000032
[Sa Jun  6 21:44:08 2020] RBP: 0000000000000000 R08: 00007f0b29a94cc4 R09: 000000000000000c
[Sa Jun  6 21:44:08 2020] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f0b29a94d20
[Sa Jun  6 21:44:08 2020] R13: 0000000000000014 R14: 0000000000000000 R15: 00007f0b29a94cc4
[Sa Jun  6 21:48:18 2020] wlp4s0: disassociated from 38:10:d5:cd:b6:5e (Reason: 2=PREV_AUTH_NOT_VALID)
[So Jun  7 01:18:37 2020] hid-generic 0005:045E:07A2.0009: unknown main item tag 0x0

Ich habe nie einen Hehl daraus gemacht, daß ich von der Windowisierung der Linux-Systemumgebung nichts halte. Hier haben wir das Ergebnis: ein Kack-Prozeß crasht — und Windows-like muß ich das Linux-System rebooten. Tolle Wurst; ich hoffe, die systemd-/NetworkManager-Fraktion ist stolz auf ihr Werk …

Also Zeit, das Problem zu lösen:

root@luggage:~# ps -Aelf | grep -i NetworkManager
4 D root      1241     1  0  80   0 - 139864 rtnl_l Jun05 ?       00:00:42 /usr/sbin/NetworkManager --no-daemon
4 S root      3058  1241  0  80   0 -  6495 poll_s Jun05 ?        00:00:01 /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-helper -pf /run/dhclient-wlp4s0.pid -lf /var/lib/NetworkManager/dhclient-6376904f-3358-4939-9804-233ff83d9c10-wlp4s0.lease -cf /var/lib/NetworkManager/dhclient-wlp4s0.conf wlp4s0
0 S root     25229  4234  0  80   0 -  3763 pipe_w 01:25 pts/0    00:00:00 grep --color=auto -i NetworkManager
root@luggage:~# dpkg -S /usr/lib/NetworkManager/nm-dhcp-helper
network-manager: /usr/lib/NetworkManager/nm-dhcp-helper
root@luggage:~# apt purge network-manager
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libcharon-standard-plugins libgtkglext1 libopenconnect5 libpango1.0-0
  libpangox-1.0-0 libstoken1 libstrongswan libstrongswan-standard-plugins
  libteamdctl0 libtomcrypt1 libtommath1 openconnect strongswan
  strongswan-charon strongswan-libcharon strongswan-starter vpnc vpnc-scripts
  xl2tpd
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  network-manager* network-manager-gnome* network-manager-l2tp*
  network-manager-l2tp-gnome* network-manager-openconnect*
  network-manager-openconnect-gnome* network-manager-openvpn*
  network-manager-openvpn-gnome* network-manager-pptp*
  network-manager-pptp-gnome* network-manager-vpnc*
  network-manager-vpnc-gnome* tlp-rdw*
0 upgraded, 0 newly installed, 13 to remove and 0 not upgraded.
After this operation, 12,8 MB disk space will be freed.
Do you want to continue? [Y/n] 
(Reading database ... 427167 files and directories currently installed.)
Removing tlp-rdw (1.1-2ubuntu1) ...
Removing network-manager-vpnc-gnome (1.2.4-6ubuntu0.1) ...
Removing network-manager-vpnc (1.2.4-6ubuntu0.1) ...
Removing network-manager-gnome (1.8.10-2ubuntu3) ...
Removing network-manager-l2tp-gnome (1.2.8-2build1) ...
Removing network-manager-l2tp (1.2.8-2build1) ...
Removing network-manager-openconnect-gnome (1.2.4-1ubuntu1) ...
Removing network-manager-openconnect (1.2.4-1ubuntu1) ...
Removing network-manager-openvpn-gnome (1.8.2-1) ...
Removing network-manager-openvpn (1.8.2-1) ...
Removing network-manager-pptp-gnome (1.2.6-1) ...
Removing network-manager-pptp (1.2.6-1) ...
Removing network-manager (1.10.14-0ubuntu2) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for libglib2.0-0:amd64 (2.56.4-0ubuntu0.18.04.6) ...
Processing triggers for libglib2.0-0:i386 (2.56.4-0ubuntu0.18.04.6) ...
Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for dbus (1.12.2-1ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gconf2 (3.2.6-4ubuntu1) ...
(Reading database ... 426743 files and directories currently installed.)
Purging configuration files for network-manager-openconnect (1.2.4-1ubuntu1) ...
dpkg: warning: while removing network-manager-openconnect, directory '/etc/NetworkManager/VPN' not empty so not removed
Purging configuration files for network-manager-openvpn (1.8.2-1) ...
Purging configuration files for tlp-rdw (1.1-2ubuntu1) ...
Purging configuration files for network-manager-pptp (1.2.6-1) ...
Purging configuration files for network-manager-gnome (1.8.10-2ubuntu3) ...
Purging configuration files for network-manager-vpnc (1.2.4-6ubuntu0.1) ...
Purging configuration files for network-manager (1.10.14-0ubuntu2) ...
dpkg: warning: while removing network-manager, directory '/etc/NetworkManager/system-connections' not empty so not removed
Purging configuration files for network-manager-l2tp (1.2.8-2build1) ...
Processing triggers for systemd (237-3ubuntu10.41) ...
Processing triggers for dbus (1.12.2-1ubuntu1.1) ...
Processing triggers for ureadahead (0.100.0-21) ...
ureadahead will be reprofiled on next reboot
root@luggage:~# 

Sachdienliche Hinweise für einen benutzerfreundlichen WiFi-Chooser bitte in die Kommentare, danke.

Sag' Deine Meinung ;)