[SOLVED] Network connection suddenly interrupted

[SOLVED] Network connection suddenly interrupted

Postby magchris » Jul 22nd, '18, 18:40

For some days I encounter the problem that the wlan connection suddenly is interrupted.
The icon in the status bar shows that there is an established connection but if I try to ping my router I get an error: „Destination Host unreachable.“ In this case, also navigation in nemo slows down a lot.
After shut down and reboot of the system the connection works again until it is interrupted again some time later.
I'm am using Mageia 6 64 bit. Kernel: 4.14.50-desktop-2.mga6

Does anyone have an idea what could be the reason. Other systems of my LAN (which doesn't have Mageia installed) haven't this problem.
Last edited by magchris on Nov 24th, '18, 19:46, edited 1 time in total.
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Re: Network connection suddenly interrupted

Postby morgano » Jul 22nd, '18, 20:55

Have you checked the journal for errors?
You could try booting on elder kernel.
You can also try latest kernel, https://bugs.mageia.org/show_bug.cgi?id=23315, also bug 32214, 23313
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Re: Network connection suddenly interrupted

Postby doktor5000 » Jul 23rd, '18, 13:19

Please provide the output of the following commands:

Code: Select all
lspcidrake -v | grep -iE "wlan|wifi|wireless|net"
ps -ef | grep -v grep | grep -iE "net|wpa"


and, as root:
Code: Select all
ifconfig -a
rfkill list all
systemctl status network.service -al
journalctl -ab | grep -iE "fw|firmware|iwl|wifi|wire|80211"
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Re: Network connection suddenly interrupted

Postby magchris » Jul 24th, '18, 18:48

Here the output of the commands (actual the system get response from the router)

Code: Select all
lspcidrake -v | grep -iE "wlan|wifi|wireless|net"

iwlwifi         : Intel Corporation|Wireless 7260 [NETWORK_OTHER] (vendor:8086 device:08b1 subv:8086 subd:4060) (rev: bb)
e1000e          : Intel Corporation|Ethernet Connection I217-V [NETWORK_ETHERNET] (vendor:8086 device:153b subv:1734 subd:11ed) (rev: 04)
btusb           : Intel Corp.|Unknown [Wireless|Radio Frequency|Bluetooth] (vendor:8087 device:07dc)

ps -ef | grep -v grep | grep -iE "net|wpa"

root        28     2  0 Jul23 ?        00:00:00 [netns]
systemd+   849     1  0 Jul23 ?        00:00:00 /usr/lib/systemd/systemd-networkd
root      1345     1  0 Jul23 ?        00:00:00 /usr/sbin/wpa_supplicant -B -i wlp2s0 -c /etc/wpa_supplicant.conf -D wext
franzis+  2736  2528  0 Jul23 ?        00:01:19 /usr/bin/perl /usr/bin/net_applet

ifconfig -a

enp0s25: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 90:1b:0e:5d:ae:01  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf7d00000-f7d20000 

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Lokale Schleife)
        RX packets 260  bytes 23838 (23.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 260  bytes 23838 (23.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.116  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 2003:e8:43d8:bb1e:aefd:ceff:fe8d:4721  prefixlen 64  scopeid 0x0<global>
        inet6 2003:e8:43d8:bbaa:aefd:ceff:fe8d:4721  prefixlen 64  scopeid 0x0<global>
        inet6 2003:e8:43d8:bb01:aefd:ceff:fe8d:4721  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::aefd:ceff:fe8d:4721  prefixlen 64  scopeid 0x20<link>
        ether ac:fd:ce:8d:47:21  txqueuelen 1000  (Ethernet)
        RX packets 212752  bytes 208359982 (198.7 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 125128  bytes 17950407 (17.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


rfkill list all
0: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
1: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

systemctl status network.service -al
● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; generated; vendor preset: enabled)
   Active: active (running) since Mo 2018-07-23 19:46:54 CEST; 22h ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1051 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0
   CGroup: /system.slice/network.service
           ├─1254 /sbin/ifplugd -I -b -i enp0s25
           ├─1345 /usr/sbin/wpa_supplicant -B -i wlp2s0 -c /etc/wpa_supplicant.
           ├─1347 /sbin/ifplugd -I -b -i wlp2s0
           └─1613 dhclient -1 -q -lf /var/lib/dhclient/dhclient--wlp2s0.lease -

Jul 23 19:46:54 Fujitsu-LE network[1051]: [  OK  ]
Jul 23 19:46:54 Fujitsu-LE ifplugd(wlp2s0)[1347]: Initialization complete, link
Jul 23 19:46:54 Fujitsu-LE systemd-sysctl[1368]: Couldn't write '0' to 'net/bri
Jul 23 19:46:54 Fujitsu-LE systemd[1]: Started LSB: Bring up/down networking.
Jul 23 19:46:58 Fujitsu-LE ifplugd(wlp2s0)[1347]: Link beat detected.
Jul 23 19:46:59 Fujitsu-LE ifplugd(wlp2s0)[1347]: Executing '/etc/ifplugd/ifplu
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPREQUEST on wlp2s0 to 255.255.255
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPACK from 192.168.2.1
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: client: Determining IP inform
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: Program executed successfully
lines 1-21/21 (END)...skipping...
● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; generated; vendor preset: enabled)
   Active: active (running) since Mo 2018-07-23 19:46:54 CEST; 22h ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1051 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/network.service
           ├─1254 /sbin/ifplugd -I -b -i enp0s25
           ├─1345 /usr/sbin/wpa_supplicant -B -i wlp2s0 -c /etc/wpa_supplicant.conf -D wext
           ├─1347 /sbin/ifplugd -I -b -i wlp2s0
           └─1613 dhclient -1 -q -lf /var/lib/dhclient/dhclient--wlp2s0.lease -pf /var/run/dhclient-wlp2s0.pid wlp2s0

Jul 23 19:46:54 Fujitsu-LE network[1051]: [  OK  ]
Jul 23 19:46:54 Fujitsu-LE ifplugd(wlp2s0)[1347]: Initialization complete, link beat not detected.
Jul 23 19:46:54 Fujitsu-LE systemd-sysctl[1368]: Couldn't write '0' to 'net/bridge/bridge-nf-call-iptables', ignoring: No such file or directory
Jul 23 19:46:54 Fujitsu-LE systemd[1]: Started LSB: Bring up/down networking.
Jul 23 19:46:58 Fujitsu-LE ifplugd(wlp2s0)[1347]: Link beat detected.
Jul 23 19:46:59 Fujitsu-LE ifplugd(wlp2s0)[1347]: Executing '/etc/ifplugd/ifplugd.action wlp2s0 up'.
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPREQUEST on wlp2s0 to 255.255.255.255 port 67
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPACK from 192.168.2.1
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: client: Determining IP information for wlp2s0... done.
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: Program executed successfully.


journalctl -ab | grep -iE "fw|firmware|iwl|wifi|wire|80211"
Jul 23 19:46:26 Fujitsu-LE kernel: Spectre V2 : Enabling Restricted Speculation for firmware calls
Jul 23 19:46:26 Fujitsu-LE kernel: ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
Jul 23 19:46:43 Fujitsu-LE kernel: Intel(R) Wireless WiFi driver for Linux
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: enabling device (0000 -> 0002)
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: loaded firmware version 17.948900127.0 op_mode iwlmvm
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless N 7260, REV=0x144
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: base HW address: ac:fd:ce:8d:47:21
Jul 23 19:46:43 Fujitsu-LE kernel: Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
Jul 23 19:46:43 Fujitsu-LE kernel: Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated
Jul 23 19:46:43 Fujitsu-LE kernel: ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
Jul 23 19:46:45 Fujitsu-LE service_harddrake[815]: FIREWIRE_CONTROLLER took:  0:00:00
Jul 23 19:46:52 Fujitsu-LE network[1051]: Configuring wireless regulatory domain  [  OK  ]
Jul 23 19:46:53 Fujitsu-LE network[1051]: Schnittstelle »wlp2s0« aktivieren:  Error for wireless request "Set Encode" (8B2A) :
Jul 23 19:46:54 Fujitsu-LE ifplugd(wlp2s0)[1347]: Using interface wlp2s0/AC:FD:CE:8D:47:21 with driver <iwlwifi> (version: 4.14.50-desktop-2.mga6)
Jul 23 19:47:14 Fujitsu-LE kernel: IFWLOG: register target
Jul 23 19:47:14 Fujitsu-LE systemd[1]: Started Network monitoring daemon (Interactive Firewall and wireless).
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Re: Network connection suddenly interrupted

Postby magchris » Jul 25th, '18, 20:01

Here the output of the commands when the connection is interrupted

Code: Select all
lspcidrake -v | grep -iE "wlan|wifi|wireless|net"
iwlwifi         : Intel Corporation|Wireless 7260 [NETWORK_OTHER] (vendor:8086 device:08b1 subv:8086 subd:4060) (rev: bb)
e1000e          : Intel Corporation|Ethernet Connection I217-V [NETWORK_ETHERNET] (vendor:8086 device:153b subv:1734 subd:11ed) (rev: 04)
btusb           : Intel Corp.|Unknown [Wireless|Radio Frequency|Bluetooth] (vendor:8087 device:07dc)


grep -iE "wlan|wifi|wireless|net"
iwlwifi         : Intel Corporation|Wireless 7260 [NETWORK_OTHER] (vendor:8086 device:08b1 subv:8086 subd:4060) (rev: bb)
e1000e          : Intel Corporation|Ethernet Connection I217-V [NETWORK_ETHERNET] (vendor:8086 device:153b subv:1734 subd:11ed) (rev: 04)
btusb           : Intel Corp.|Unknown [Wireless|Radio Frequency|Bluetooth] (vendor:8087 device:07dc)
[franziska@Fujitsu-LE ~]$ ps -ef | grep -v grep | grep -iE "net|wpa"
root        28     2  0 Jul23 ?        00:00:00 [netns]
systemd+   849     1  0 Jul23 ?        00:00:00 /usr/lib/systemd/systemd-networkd
root      1345     1  0 Jul23 ?        00:00:00 /usr/sbin/wpa_supplicant -B -i wlp2s0 -c /etc/wpa_supplicant.conf -D wext
franzis+  2736  2528  0 Jul23 ?        00:02:44 /usr/bin/perl /usr/bin/net_applet
franzis+ 31496     1  0 Jul24 ?        00:00:00 /usr/libexec/gvfsd-network --spawner :1.1 /org/gtk/gvfs/exec_spaw/2

rfkill list all
0: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
1: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

● network.service - LSB: Bring up/down networking
   Loaded: loaded (/etc/rc.d/init.d/network; generated; vendor preset: enabled)
   Active: active (running) since Mo 2018-07-23 19:46:54 CEST; 1 day 23h ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1051 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/
   CGroup: /system.slice/network.service
           ├─1254 /sbin/ifplugd -I -b -i enp0s25
           ├─1345 /usr/sbin/wpa_supplicant -B -i wlp2s0 -c /etc/wpa_supplicant.c
           ├─1347 /sbin/ifplugd -I -b -i wlp2s0
           └─1613 dhclient -1 -q -lf /var/lib/dhclient/dhclient--wlp2s0.lease -p

Jul 23 19:46:54 Fujitsu-LE network[1051]: [  OK  ]
Jul 23 19:46:54 Fujitsu-LE ifplugd(wlp2s0)[1347]: Initialization complete, link
Jul 23 19:46:54 Fujitsu-LE systemd-sysctl[1368]: Couldn't write '0' to 'net/brid
Jul 23 19:46:54 Fujitsu-LE systemd[1]: Started LSB: Bring up/down networking.
Jul 23 19:46:58 Fujitsu-LE ifplugd(wlp2s0)[1347]: Link beat detected.
Jul 23 19:46:59 Fujitsu-LE ifplugd(wlp2s0)[1347]: Executing '/etc/ifplugd/ifplug
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPREQUEST on wlp2s0 to 255.255.255.
Jul 23 19:47:00 Fujitsu-LE dhclient[1490]: DHCPACK from 192.168.2.1
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: client: Determining IP informa
Jul 23 19:47:00 Fujitsu-LE ifplugd(wlp2s0)[1347]: Program executed successfully.

 journalctl -ab | grep -iE "fw|firmware|iwl|wifi|wire|80211"
Jul 23 19:46:26 Fujitsu-LE kernel: Spectre V2 : Enabling Restricted Speculation for firmware calls
Jul 23 19:46:26 Fujitsu-LE kernel: ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
Jul 23 19:46:43 Fujitsu-LE kernel: Intel(R) Wireless WiFi driver for Linux
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: enabling device (0000 -> 0002)
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: loaded firmware version 17.948900127.0 op_mode iwlmvm
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band Wireless N 7260, REV=0x144
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: base HW address: ac:fd:ce:8d:47:21
Jul 23 19:46:43 Fujitsu-LE kernel: Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
Jul 23 19:46:43 Fujitsu-LE kernel: Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated
Jul 23 19:46:43 Fujitsu-LE kernel: ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
Jul 23 19:46:43 Fujitsu-LE kernel: iwlwifi 0000:02:00.0 wlp2s0: renamed from wlan0
Jul 23 19:46:45 Fujitsu-LE service_harddrake[815]: FIREWIRE_CONTROLLER took:  0:00:00
Jul 23 19:46:52 Fujitsu-LE network[1051]: Configuring wireless regulatory domain  [  OK  ]
Jul 23 19:46:53 Fujitsu-LE network[1051]: Schnittstelle »wlp2s0« aktivieren:  Error for wireless request "Set Encode" (8B2A) :
Jul 23 19:46:54 Fujitsu-LE ifplugd(wlp2s0)[1347]: Using interface wlp2s0/AC:FD:CE:8D:47:21 with driver <iwlwifi> (version: 4.14.50-desktop-2.mga6)
Jul 23 19:47:14 Fujitsu-LE kernel: IFWLOG: register target
Jul 23 19:47:14 Fujitsu-LE systemd[1]: Started Network monitoring daemon (Interactive Firewall and wireless).
Jul 25 17:10:38 Fujitsu-LE kernel: WARNING: CPU: 3 PID: 0 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1883 iwl_trans_pcie_grab_nic_access+0xdf/0xf0 [iwlwifi]
Jul 25 17:10:38 Fujitsu-LE kernel: Modules linked in: uinput rfcomm hidp ipt_IFWLOG ipt_psd xt_set ip_set_hash_ip ip_set iptable_nat nf_nat_ipv4 xt_recent ip6table_nat nf_nat_ipv6 xt_comment ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_addrtype iptable_mangle iptable_raw nf_conntrack_ipv4 nf_defrag_ipv4 bridge stp llc xt_mark ip6table_mangle xt_tcpudp xt_CT ip6table_raw xt_multiport nf_log_ipv4 nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_tftp nf_nat_snmp_basic xt_conntrack nf_conntrack_snmp nf_nat_sip nf_nat_pptp nf_nat_proto_gre nf_nat_irc xt_NFLOG nfnetlink_log nf_nat_h323 xt_LOG nf_nat_ftp nf_log_ipv6 nf_nat_amanda nf_nat nf_log_common nf_conntrack_tftp nf_conntrack_sane nf_conntrack_sip nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_netlink nfnetlink nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc
Jul 25 17:10:38 Fujitsu-LE kernel:  nf_conntrack_h323 ts_kmp nf_conntrack_ftp nf_conntrack_amanda nf_conntrack ip6table_filter md4 ip6_tables iptable_filter ip_tables x_tables cifs ccm af_packet ppp_async ppp_generic slhc bnep msr fuse dm_mirror dm_region_hash dm_log dm_mod nls_utf8 nls_cp437 vfat fat intel_rapl rtsx_usb_ms memstick x86_pkg_temp_thermal intel_powerclamp joydev input_leds coretemp kvm_intel kvm arc4 irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel btusb pcbc aesni_intel iwlmvm btrtl snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi aes_x86_64 btbcm snd_hda_intel mac80211 iTCO_wdt iTCO_vendor_support crypto_simd glue_helper cryptd btintel snd_hda_codec snd_hda_core iwlwifi intel_cstate bluetooth snd_hwdep intel_uncore intel_rapl_perf snd_pcm cfg80211 fan thermal ecdh_generic
Jul 25 17:10:38 Fujitsu-LE kernel: RIP: 0010:iwl_trans_pcie_grab_nic_access+0xdf/0xf0 [iwlwifi]
Jul 25 17:10:38 Fujitsu-LE kernel:  iwl_read_prph+0x32/0x90 [iwlwifi]
Jul 25 17:10:38 Fujitsu-LE kernel:  iwl_trans_pcie_log_scd_error+0x122/0x1f0 [iwlwifi]
Jul 25 17:10:38 Fujitsu-LE kernel:  ? iwl_pcie_txq_build_tfd+0xe0/0xe0 [iwlwifi]
Jul 25 17:10:38 Fujitsu-LE kernel:  iwl_pcie_txq_stuck_timer+0x3b/0x50 [iwlwifi]
Jul 25 17:10:39 Fujitsu-LE kernel: iwlwifi 0000:02:00.0: Queue 10 is active on fifo 2 and stuck for 10000 ms. SW [69, 88] HW [90, 90] FH TRB=0x05a5a5a5a


In the journal I found this warning
Code: Select all
Jul 25 17:10:38 Fujitsu-LE kernel: WARNING: CPU: 3 PID: 0 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1883 iwl_trans_pcie_grab_nic_access+0xdf/0xf0 [iwlwifi]
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Re: Network connection suddenly interrupted

Postby doktor5000 » Jul 29th, '18, 20:27

For the systemctl status network.service -al some lines are cut off on the right side ...

You may want to try some of the module options, like disabling power management as mentioned in https://ubuntuforums.org/showthread.php?t=2339439

Although on newer kernels there are quite a lot of similar reports:
https://bugzilla.redhat.com/show_bug.cgi?id=1585412
https://bugzilla.redhat.com/show_bug.cgi?id=1562578
https://bugzilla.redhat.com/show_bug.cgi?id=1236495
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Re: Network connection suddenly interrupted

Postby wintpe » Jul 30th, '18, 11:00

I posted a similar issue after running powertop, it set into place suspending usb and i found my usb mouse and keyboard just dropping off occupationally.

i wrote a systemctl start script to re-enable the ports overriding the powertop behaviour.

then found powertop installs a systemctl start script itself to keep reapplying the profile

have you installed powertop, this may be behind the issue.

regards peter
Redhat 6 Certified Engineer (RHCE)
Sometimes my posts will sound short, or snappy, however its realy not my intention to offend, so accept my apologies in advance.
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Re: Network connection suddenly interrupted

Postby magchris » Jul 30th, '18, 18:56

have you installed powertop, this may be behind the issue


Thank you for this tip but I haven't installed powertop on this maschine
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Re: Network connection suddenly interrupted

Postby magchris » Jul 31st, '18, 07:00

I found this post:
http://www.remotebits.com/index.php/201 ... in-ubuntu/

I turned off power management for the wifi adapter by
Code: Select all
sudo iwconfig wlp2s0 power off

and now will see whether it solves the problem.
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Re: Network connection suddenly interrupted

Postby magchris » Jul 31st, '18, 21:07

Unfortunately "sudo iwconfig wlp2s0 power off" doesn't solve the problem. The wifi connection was interrupted again.
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Re: Network connection suddenly interrupted

Postby doktor5000 » Aug 1st, '18, 15:58

Did you try already as suggested earlier?
doktor5000 wrote:You may want to try some of the module options, like disabling power management as mentioned in https://ubuntuforums.org/showthread.php?t=2339439
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Re: Network connection suddenly interrupted

Postby wintpe » Aug 1st, '18, 16:34

interpreting some of doktors hints

i didnt have my mageia handy, so on a redhat system

Code: Select all
modinfo iwlwifi|grep power_save
parm:           power_save:enable WiFi power management (default: disable) (bool)

what does yours say.

if it does not say disabled them use

Code: Select all
modprobe  iwlwifi power_save=disable


to make it permanent add a file called disable_wifi_power_mamangment or similar (name not important)

with

Code: Select all
options iwlwifi power_save=disable


in /etc/modprobe.d

regards peter
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Re: Network connection suddenly interrupted

Postby magchris » Aug 1st, '18, 22:07

Here he output of my system
Code: Select all
$ modinfo iwlwifi|grep power_save
parm:           power_save:enable WiFi power management (default: disable) (bool)

Now I did also
Code: Select all
# sudo -i
# echo "options iwlwifi power_save=0"  >>  /etc/modprobe.d/iwlwifi.conf

which was proposed in the post which doktor5000 mentioned above
I'm not sure whether there is a difference to the existing configuration
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Re: Network connection suddenly interrupted

Postby banjo » Aug 3rd, '18, 04:19

I am having a similar issue. The wifi drops out at random times. The power management appears to be off.

Code: Select all
# iwconfig
lo        no wireless extensions.

wlp0s29f7u4  IEEE 802.11  ESSID:"FiOS-V51TW" 
          Mode:Managed  Frequency:2.462 GHz  Access Point: 48:5D:36:F7:5F:7C   
          Bit Rate=72.2 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=65/70  Signal level=-45 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:134   Missed beacon:0

enp4s1    no wireless extensions.

enp2s0    no wireless extensions.



Code: Select all
# modinfo iwlwifi|grep power_save
parm:           power_save:enable WiFi power management (default: disable) (bool)


When I monitor the wifi, it reports some minimal traffic up and down, but when I try to use it in a browser, it reports that there is no internet.

Sometimes it runs all day and sometimes it fails in just a few minutes.

In fact, it just failed while I was trying to post this.

I can usually restore the connection by opening the network manager, disconnecting from the wifi and reconnecting.

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Re: Network connection suddenly interrupted

Postby wintpe » Aug 3rd, '18, 10:52

as a process of elimination, if you have a android phone or one that allows turning it into a access point/bridge

could you instead of connecting to your broadband connect to your phone and see if its any more stable.

im just trying to see if the settings the driver is now applying (firmware, driver, hardware combination)

is not playing ball with your router.

also in case its a common problem both of you what router/isp are you using

regards peter
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Re: Network connection suddenly interrupted

Postby banjo » Aug 3rd, '18, 14:03

The ISP is Verizon FIOS, the router is the new FIOS Quantum Gateway. We were just updated a few months ago. I think that we had the same problem before the upgrade, but I may be mistaken in that. My memory is not clear on when I first noticed the issue.

We have seen no Wifi issues with any other devices including a Samsung Smart TV, two HP wireless printers, a Mint desktop computer, a Windows laptop computer and four Samsung smart phones. It is just the Mageia 6 computer in the basement. The signal down there is not the strongest, so that may be an issue. I don't know. It is not terribly weak either, as you can see in my previously posted information. When it is working, and I ping the web, it always shows no lost packets.

My phone is not set up to be used as an access point, and I am not sure how I would do that.

BTW, the wifi adapter has the Atheros chip. I don't have the driver details etc because I am typing this on another computer. Here is the adapter information

Code: Select all
ALFA Network AWUS036NHA Atheros AR9271 2000mW 802.11b/g/n Wireless-N USB WLAN Adapter with 5dBi Antenna


This is not a show-stopper problem for me because the Mageia 6 computer is a backup system, and my main computer is always hard wired into the router switch. After I boot the Mageia system I will gather more information and see if I can help trouble shoot this problem. From the chatter in the links posted on this thread, it appears to be a cross-distro problem as well.

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Re: Network connection suddenly interrupted

Postby magchris » Aug 3rd, '18, 17:36

My router is a Speedport manufactured by Arcadyan with newest firmware installed.
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Re: Network connection suddenly interrupted

Postby doktor5000 » Aug 4th, '18, 04:33

@banjo: Please create a separate thread for your issue.
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Re: Network connection suddenly interrupted

Postby magchris » Oct 11th, '18, 07:53

I'm futher struggeling with this issue.

Now I found out following:
At the same time when the network connection is interrupted I get the message "ping: sendmsg: no buffer space available."
When I try to ping the router later on, I get the message "destination host unrechable"

I guess this is the reason of all my trouble.

While searching how to increase the buffer space I found this article which is very old (2009)
https://www.cyberciti.biz/faq/linux-tcp-tuning/

Does anybody know whether it would be valid also for an actual mageia installation or wat I have to do to increase the buffer size of my mageia system.

Thanks in advance
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Re: Network connection suddenly interrupted

Postby doktor5000 » Oct 11th, '18, 15:47

magchris wrote:While searching how to increase the buffer space I found this article which is very old (2009)
https://www.cyberciti.biz/faq/linux-tcp-tuning/

Does anybody know whether it would be valid also for an actual mageia installation or wat I have to do to increase the buffer size of my mageia system.

Those are basic kernel tunables, and no matter if they are old or not, they still apply to the kernel no matter what distro ...

Although in your case I'd say changing those tunables might not solve the actual issue, which might be a hardware/driver problem, or the combination of your wireless chipset and your wireless router.

I'd say try a different wireless adapter to check whether it also happens with that one.
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Re: Network connection suddenly interrupted

Postby magchris » Nov 24th, '18, 19:44

Here an update.
Finally I could solve the problem by using an external usb wifi adapter instead of the internal wifi adapter.
The first adapter which I tried had a very poor performance under linux (< 1 MBit/s)

The adapter which I use now is an ALLNET ALL0233DB which has a Ralink RT5572 chipset.
The connection is stable. I hadn't any interruptions for more than 3 weeks and the performance is quite god when I use the 2,4 GHz band.
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