Notificação de Falha de Conexão

[Kharlusernic]

Estou recebendo notificação constante com a mensagem "falha de conexão - falha ao ativar a conexão de rede", tomei a decisão de mudar a versão do meu distro Ubuntu 18.04 LTS para 19.04 na esperança de  com a nova versão, resolveria o problema, mas não resolveu. Preciso de ajuda. Tenho, instalado, dois sistemas operacionais, mas no Windows não aparece a mensagem. A falha da conexão, não impede de usar a internet,mas incomoda.

[zekkerj]

que tipo de conexão você usa?

[Kharlusernic]

Utilizo o Wi-fi da operadora vivo. Mas o erro também se dá com a conexão via cabo. Percebi agora, ao  contrário  do que escrevi, dizendo que não atrapalha na navegação, pelo contrário, atrapalha sim, o sinal cai, perco a navegação. Quando mudo para o Windows, não acusa o erro.
a propósito, obrigado por me dar atenção.

[zekkerj]

Executa o comando "dmesg | tail -50" na hora em que a mensagem aparecer e cola o resultado aqui, por favor.

[Valdilene]

 dmesg | tail -50
[    5.296914] raid6: using algorithm avx2x2 gen() 17269 MB/s
[    5.297846] raid6: .... xor() 8112 MB/s, rmw enabled
[    5.298643] raid6: using avx2x2 recovery algorithm
[    5.302520] xor: automatically using best checksumming function   avx
[    5.306483] async_tx: api initialized (async)
[    5.385665] Btrfs loaded, crc32c=crc32c-intel
[    5.847459] EXT4-fs (xvda3): mounted filesystem with ordered data mode. Opts: (null)
[    6.167343] ip_tables: (C) 2000-2006 Netfilter Core Team
[    6.185623] systemd[1]: systemd 237 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[    6.189100] systemd[1]: Detected virtualization xen.
[    6.190226] systemd[1]: Detected architecture x86-64.
[    6.206330] systemd[1]: Set hostname to <vps15633.publiccloud.com.br>.
[    6.455683] systemd[1]: Created slice User and Session Slice.
[    6.458650] systemd[1]: Created slice System Slice.
[    6.461082] systemd[1]: Listening on Device-mapper event daemon FIFOs.
[    6.464263] systemd[1]: Created slice system-serial\x2dgetty.slice.
[    6.466524] systemd[1]: Listening on fsck to fsckd communication Socket.
[    6.468909] systemd[1]: Reached target Slices.
[    6.545767] Loading iSCSI transport class v2.0-870.
[    6.628972] EXT4-fs (xvda3): re-mounted. Opts: errors=remount-ro,barrier=0
[    6.681164] iscsi: registered transport (tcp)
[    6.734794] random: crng init done
[    6.735903] random: 7 urandom warning(s) missed due to ratelimiting
[    6.833258] iscsi: registered transport (iser)
[    7.036236] systemd-journald[432]: Received request to flush runtime journal from PID 1
[    7.047927] systemd-journald[432]: File /var/log/journal/0ba4e6214a4fa7532bdf1c4157df5d80/system.journal corrupted or uncleanly shut down, renaming and replacing.
[    7.891861] parport_pc 00:07: reported by Plug and Play ACPI
[    7.894473] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[    8.200216] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 655360 ms ovfl timer
[    8.200218] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
[    8.200219] RAPL PMU: hw unit of domain package 2^-14 Joules
[    8.200220] RAPL PMU: hw unit of domain dram 2^-16 Joules
[    8.306871] intel_rapl: Found RAPL domain package
[    8.306890] intel_rapl: Found RAPL domain dram
[    8.306892] intel_rapl: DRAM domain energy unit 15300pj
[    8.504730] ppdev: user-space parallel port driver
[   11.375901] Adding 975868k swap on /dev/xvda2.  Priority:-2 extents:1 across:975868k SSFS
[   11.481057] EXT4-fs (xvda1): mounted filesystem with ordered data mode. Opts: (null)
[   11.835681] audit: type=1400 audit(1567902208.300:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lxc-container-default" pid=757 comm="apparmor_parser"
[   11.835685] audit: type=1400 audit(1567902208.300:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lxc-container-default-cgns" pid=757 comm="apparmor_parser"
[   11.835687] audit: type=1400 audit(1567902208.300:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lxc-container-default-with-mounting" pid=757 comm="apparmor_parser"
[   11.835689] audit: type=1400 audit(1567902208.300:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lxc-container-default-with-nesting" pid=757 comm="apparmor_parser"
[   11.843444] audit: type=1400 audit(1567902208.308:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/sbin/dhclient" pid=758 comm="apparmor_parser"
[   11.843447] audit: type=1400 audit(1567902208.308:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=758 comm="apparmor_parser"
[   11.843449] audit: type=1400 audit(1567902208.308:: apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-helper" pid=758 comm="apparmor_parser"
[   11.843451] audit: type=1400 audit(1567902208.308:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=758 comm="apparmor_parser"
[   11.846880] audit: type=1400 audit(1567902208.312:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/bin/lxc-start" pid=759 comm="apparmor_parser"
[   11.851593] audit: type=1400 audit(1567902208.316:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/bin/man" pid=760 comm="apparmor_parser"
[   12.090626] new mount options do not match the existing superblock, will be ignored
[  325.302601] TCP: request_sock_TCP: Possible SYN flooding on port 80. Sending cookies.  Check SNMP counters.

[Kharlusernic]

Conforme sua orientação, após digitar o comando, as informações foram...

carlos@carlos-Inspiron-5566:~$ dmesg | tail -50
[   92.214554] audit: type=1400 audit(1568373028.732:60): apparmor="DENIED" operation="capable" profile="/usr/sbin/mysqld" pid=1109 comm="mysqld" capability=2  capname="dac_read_search"
[   92.218557] audit: type=1107 audit(1568373028.736:61): pid=909 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call"  bus="system" path="/org/freedesktop/systemd1" interface="org.freedesktop.systemd1.Manager" member="GetDynamicUsers" mask="send" name="org.freedesktop.systemd1" pid=1109 label="/usr/sbin/mysqld" peer_pid=1 peer_label="unconfined"
                exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
[   93.874395] audit: type=1400 audit(1568373030.392:62): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=1185 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=123 ouid=0
[  113.987601] wlp2s0: authenticate with 88:6a:e3:d1:89:34
[  114.000417] wlp2s0: send auth to 88:6a:e3:d1:89:34 (try 1/3)
[  114.001948] wlp2s0: authenticated
[  114.002068] wlp2s0: associating with AP with corrupt probe response
[  114.002360] wlp2s0: associate with 88:6a:e3:d1:89:34 (try 1/3)
[  114.005027] wlp2s0: RX AssocResp from 88:6a:e3:d1:89:34 (capab=0xc11 status=0 aid=2)
[  114.005175] wlp2s0: associated
[  114.005254] ath: EEPROM regdomain: 0x804c
[  114.005255] ath: EEPROM indicates we should expect a country code
[  114.005256] ath: doing EEPROM country->regdmn map search
[  114.005256] ath: country maps to regdmn code: 0x3b
[  114.005257] ath: Country alpha2 being used: BR
[  114.005257] ath: Regpair used: 0x3b
[  114.005259] ath: regdomain 0x804c dynamically updated by country element
[  114.220586] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
[  122.895569] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
[  122.904905] amdgpu: [powerplay] can't get the mac of 5
[  140.315088] amdgpu: [powerplay] VI should always have 2 performance levels
[  140.351569] amdgpu 0000:01:00.0: GPU pci config reset
[  221.932578] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
[  221.940404] amdgpu: [powerplay] can't get the mac of 5
[  229.934738] amdgpu: [powerplay] VI should always have 2 performance levels
[  229.968340] amdgpu 0000:01:00.0: GPU pci config reset
[  232.686638] [drm] PCIE GART of 256M enabled (table at 0x000000F400000000).
[  232.696865] amdgpu: [powerplay] can't get the mac of 5
[  238.912688] amdgpu: [powerplay] VI should always have 2 performance levels
[  238.950440] amdgpu 0000:01:00.0: GPU pci config reset
[  246.311308] Bluetooth: RFCOMM TTY layer initialized
[  246.311321] Bluetooth: RFCOMM socket layer initialized
[  246.311332] Bluetooth: RFCOMM ver 1.11
[  247.984656] rfkill: input handler disabled
[  414.597978] wlp2s0: authenticate with 88:6a:e3:d1:89:34
[  414.611316] wlp2s0: send auth to 88:6a:e3:d1:89:34 (try 1/3)
[  414.617042] wlp2s0: authenticated
[  414.618794] wlp2s0: associating with AP with corrupt probe response
[  414.620514] wlp2s0: associate with 88:6a:e3:d1:89:34 (try 1/3)
[  415.870294] wlp2s0: associate with 88:6a:e3:d1:89:34 (try 2/3)
[  416.114344] wlp2s0: RX AssocResp from 88:6a:e3:d1:89:34 (capab=0xc11 status=0 aid=2)
[  416.114572] wlp2s0: associated
[  416.114964] ath: EEPROM regdomain: 0x804c
[  416.114968] ath: EEPROM indicates we should expect a country code
[  416.114971] ath: doing EEPROM country->regdmn map search
[  416.114973] ath: country maps to regdmn code: 0x3b
[  416.114977] ath: Country alpha2 being used: BR
[  416.114979] ath: Regpair used: 0x3b
[  416.114984] ath: regdomain 0x804c dynamically updated by country element

[zekkerj]

Opa, desculpe a demora na resposta.

Estou vendo duas mensagens que parecem estar relacionadas com o problema:

Código: [Selecionar]

[  414.618794] wlp2s0: associating with AP with corrupt probe response
e

Código: [Selecionar]

[  416.114968] ath: EEPROM indicates we should expect a country code
Pesquise um pouco no Google sobre elas, pode ser que a solução esteja em corrigir a situação que faz o sistema emitir essas linhas.