IP address disappearing, have to reconnect to recover.

Hello Forum, found a strange behavior.

Using an onboard NIC (intel 219V) from a h170 pro gaming asus board.

I was checking the forum, and my connection was lost. Couldn't ping my gateway or anything else.
Checked my interface with the "ip a" command in CLI, and noticed that my IP address was missing from the interface.

Had to reconnect to recover.

Not sure if this a known issue, or just happening to me.

This doesn't happen in Windows.

The log is the "ip a" command, with the IP address information missing. Sorry but I've close the terminal, and now I'll have to wait for the problem to start again.

Using Manjaro KDE lastest version, actually downloading the update that was released today.
If there is something else that I can post here right now, let me know, thanks.

Based on your comments, it seems that this is not a known issue as I suspected.
But thanks for the tutorial.

inxi -Fxxxza --no-host
System:    Kernel: 5.4.14-2-MANJARO x86_64 bits: 64 compiler: gcc v: 9.2.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.4-x86_64 root=UUID=791a2ca2-0410-4469-8d95-a74434ed1056 rw quiet apparmor=1 
           security=apparmor resume=UUID=581c6b67-62bc-4e45-8b21-81f366f3b27c udev.log_priority=3 
           Desktop: KDE Plasma 5.17.5 tk: Qt 5.14.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Desktop Mobo: ASUSTeK model: H170 PRO GAMING v: Rev X.0x serial: <filter> UEFI: American Megatrends v: 3805 
           date: 05/16/2018 
Battery:   Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard serial: <filter> charge: 55% (should be ignored) 
           rechargeable: yes status: Discharging 
CPU:       Topology: Quad Core model: Intel Core i7-7700 bits: 64 type: MT MCP arch: Kaby Lake family: 6 model-id: 9E (158) 
           stepping: 9 microcode: CA L2 cache: 8192 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 57616 
           Speed: 800 MHz min/max: 800/4200 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 801 8: 802 
           Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages 
           Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
           Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
           Type: meltdown mitigation: PTI 
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling 
           Type: tsx_async_abort mitigation: Clear CPU buffers; SMT vulnerable 
Graphics:  Device-1: Intel HD Graphics 630 vendor: ASUSTeK driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:5912 
           Device-2: NVIDIA TU116 [GeForce GTX 1660] vendor: Gigabyte driver: nvidia v: 440.44 bus ID: 01:00.0 
           chip ID: 10de:2184 
           Display: x11 server: X.Org 1.20.7 driver: nvidia compositor: kwin_x11 resolution: 1920x1080~60Hz, 1920x1080~60Hz 
           OpenGL: renderer: GeForce GTX 1660/PCIe/SSE2 v: 4.6.0 NVIDIA 440.44 direct render: Yes 
Audio:     Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel 
           bus ID: 00:1f.3 chip ID: 8086:a170 
           Device-2: NVIDIA vendor: Gigabyte driver: snd_hda_intel v: kernel bus ID: 01:00.1 chip ID: 10de:1aeb 
           Sound Server: ALSA v: k5.4.14-2-MANJARO 
Network:   Device-1: Intel Ethernet I219-V vendor: ASUSTeK driver: e1000e v: 3.2.6-k port: f040 bus ID: 00:1f.6 
           chip ID: 8086:15b8 
           IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter> 
Drives:    Local Storage: total: 1.13 TiB used: 363.28 GiB (31.5%) 
           ID-1: /dev/sda vendor: Corsair model: Neutron GTX SSD size: 223.57 GiB block size: physical: 512 B logical: 512 B 
           speed: 6.0 Gb/s serial: <filter> rev: M311 scheme: GPT 
           ID-2: /dev/sdb vendor: Seagate model: ST1000DM010-2EP102 size: 931.51 GiB block size: physical: 4096 B 
           logical: 512 B speed: 6.0 Gb/s rotation: 7200 rpm serial: <filter> rev: CC43 scheme: GPT 
Partition: ID-1: / raw size: 32.00 GiB size: 31.25 GiB (97.64%) used: 15.34 GiB (49.1%) fs: ext4 dev: /dev/sda6 
           ID-2: swap-1 size: 8.00 GiB used: 0 KiB (0.0%) fs: swap swappiness: 60 (default) cache pressure: 100 (default) 
           dev: /dev/sda5 
Sensors:   System Temperatures: cpu: 29.8 C mobo: 27.8 C gpu: nvidia temp: 47 C 
           Fan Speeds (RPM): N/A gpu: nvidia fan: 0% 
Info:      Processes: 222 Uptime: 3h 45m Memory: 15.51 GiB used: 1.69 GiB (10.9%) Init: systemd v: 242 Compilers: gcc: 9.2.0 
           Shell: bash v: 5.0.11 running in: konsole inxi: 3.0.37 

journal:

..skipping...
jan 30 11:29:54 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:54 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:54 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:54 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:55 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:55 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:57 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:29:57 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:30:01 marcelo-pc systemd[1]: NetworkManager-dispatcher.service: Succeeded.
jan 30 11:30:01 marcelo-pc audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManager-dispatcher comm="systemd" >
jan 30 11:30:01 marcelo-pc kernel: audit: type=1131 audit(1580394601.629:161): pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManag>
jan 30 11:30:56 marcelo-pc NetworkManager[638]: <info>  [1580394656.1593] manager: NetworkManager state is now CONNECTED_GLOBAL
jan 30 11:30:56 marcelo-pc dbus-daemon[637]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatch>
jan 30 11:30:56 marcelo-pc systemd[1]: Starting Network Manager Script Dispatcher Service...
jan 30 11:30:56 marcelo-pc dbus-daemon[637]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
jan 30 11:30:56 marcelo-pc systemd[1]: Started Network Manager Script Dispatcher Service.
jan 30 11:30:56 marcelo-pc audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManager-dispatcher comm="systemd">
jan 30 11:30:56 marcelo-pc kernel: audit: type=1130 audit(1580394656.182:162): pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManag>
jan 30 11:31:06 marcelo-pc systemd[1]: NetworkManager-dispatcher.service: Succeeded.
jan 30 11:31:06 marcelo-pc audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManager-dispatcher comm="systemd" >
jan 30 11:31:06 marcelo-pc kernel: audit: type=1131 audit(1580394666.636:163): pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=NetworkManag>
jan 30 11:33:04 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:33:04 marcelo-pc rtkit-daemon[1119]: Supervising 6 threads of 3 processes of 1 users.
jan 30 11:33:16 marcelo-pc plasmashell[1036]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/main.qml:454: TypeError: Cannot read prop>
jan 30 11:33:16 marcelo-pc plasmashell[1036]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:371: Unable to assign [undefined>
jan 30 11:33:16 marcelo-pc konsole[29495]: QCommandLineParser: already having an option named "h"
jan 30 11:33:16 marcelo-pc konsole[29495]: QCommandLineParser: already having an option named "help-all"
jan 30 11:33:16 marcelo-pc konsole[29495]: QCommandLineParser: already having an option named "v"

I see you're using kernel 5.4. It's got a "reputation" for sometimes causing all kind of weird network problems.
Try another kernel, preferably 5.5 (just landed in stable as 5.5.0) or an LTS like 4.19.

1 Like

Hm, nice to know about that kernel 5.4 reputation.
I'll definitely try 5.5.

Thanks buddy.

Tried 5.5.0-1 and noticed that audio through display port is no longer working.
When trying to select the audio card in KDE to use the NVIDIA card, found that it showing as "disconnected".

 cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7240000 irq 141
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xf7080000 irq 17

But this is a subject for another topic.

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