I'm running My wireless was disconnecting every couple minutes and I wasn't sure why. I an answer in another post hidden in the comments:
from @Pilot6
sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi disable_11n=1"
Now my problem seems to have gotten better because my wifi isn't dropping every 5 minutes; however, it's still dropping (in the sense that I have to reset my connect by clicking on the wifi icon in the upper right). So I'd like to know more about what I can do to solve my wifi issues, but I'd also like to know about the process of solving my wifi issues, and specifically @Pilot6's command shown above.
I understand that <<< causes "options iwlwifi disable_11n=1" to be passed as input to the rest of the command, which in the case of tee I'm pretty sure is (like a tee for plumbing) piping output to both a text file /etc/modprobe.d/iwlwifi-opt.conf and to stdout (so I see it on the screen). I can confirm:
server@thinkpad:~/Desktop$ cat /etc/modprobe.d/iwlwifi-opt.conf
options iwlwifi 11n_disable=1
And so in true *nix fashion one line of text placed in the correct config file solved all my problems ;), but what I'd like to know is why? and how the heck did @Pilot6 know to put it there?
I know that /etc/modeprobe.d is a configuration directory for modprobe, and man modprobe tells us:
modprobe - Add and remove modules from the Linux Kernel
which is making more sense why there are all these text files in that directory that go something like blacklist*.conf
so taking another look into iwlwifi-opt.conf
options iwlwifi 11n_disable=1
It seems like maybe Pilot6 is trying to say something like: "there is a module in the linux kernel that is currently enabled that is causing problems so let's disable it"
Is this basically correct from a high level?
And then also, how come this worked for me (at least somewhat)? And how did Pilot6 know to try that?
Attached is the output of from script found in another post
thanks for the help :)
########## wireless info START ##########
Report from: 14 Aug 2016 21:24 PDT -0700
Booted last: 14 Aug 2016 00:00 PDT -0700
Script from: 08 Jul 2016 02:16 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 16.04 LTS
Release: 16.04
Codename: xenial
##### kernel ############################
Linux 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
Subsystem: Lenovo 82579LM Gigabit Network Connection [17aa:21ce]
Kernel driver in use: e1000e
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8195]
Kernel driver in use: rtl8192ce
##### lsusb #############################
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b221 Chicony Electronics Co., Ltd integrated camera
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
rtl8192ce 57344 0
rtl_pci 28672 1 rtl8192ce
rtl8192c_common 53248 1 rtl8192ce
rtlwifi 77824 3 rtl_pci,rtl8192c_common,rtl8192ce
mac80211 737280 3 rtl_pci,rtlwifi,rtl8192ce
cfg80211 565248 2 mac80211,rtlwifi
wmi 20480 0
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
enp0s25 Link encap:Ethernet HWaddr <MAC 'enp0s25' [IF1]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:20 Memory:f2600000-f2620000
wlp3s0 Link encap:Ethernet HWaddr <MAC 'wlp3s0' [IF2]>
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::99:136a:8178:e9be/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:22117 errors:0 dropped:0 overruns:0 frame:0
TX packets:18726 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:17135383 (17.1 MB) TX bytes:2771222 (2.7 MB)
##### iwconfig ##########################
lo no wireless extensions.
enp0s25 no wireless extensions.
wlp3s0 IEEE 802.11bgn ESSID:"Comcast"
Mode:Managed Frequency:2.417 GHz Access Point: <MAC 'Comcast' [AC1]>
Bit Rate=72.2 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=69/70 Signal level=-41 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:58 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp3s0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp3s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp3s0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 763 1 0 20:13 ? 00:00:04 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: wlp3s0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8188CE 802.11b/g/n WiFi Adapter
GENERAL.DRIVER: rtl8192ce
GENERAL.DRIVER-VERSION: 4.4.0-34-generic
GENERAL.FIRMWARE-VERSION: N/A
GENERAL.HWADDR: <MAC 'wlp3s0' [IF2]>
GENERAL.MTU: 0
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlp3s0
GENERAL.IP-IFACE: wlp3s0
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: Comcast
GENERAL.CON-UUID: 4e14a31d-a324-4ae7-9c52-c8fe0088bac3
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: 72 Mb/s
CAPABILITIES.IS-SOFTWARE: no
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
WIFI-PROPERTIES.2GHZ: yes
WIFI-PROPERTIES.5GHZ: no
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{1,0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 4e14a31d-a324-4ae7-9c52-c8fe0088bac3 | Comcast
CONNECTIONS.AVAILABLE-CONNECTIONS[2]: 5affbcb4-41d3-4ccd-90af-c854fc397162 | DIRECT-56-HP OfficeJet 3830
IP4.ADDRESS[1]: 192.168.1.10/24
IP4.GATEWAY: 192.168.1.1
IP4.ROUTE[1]: dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]: 192.168.1.1
DHCP4.OPTION[1]: requested_routers = 1
DHCP4.OPTION[2]: requested_domain_search = 1
DHCP4.OPTION[3]: requested_time_offset = 1
DHCP4.OPTION[4]: requested_domain_name = 1
DHCP4.OPTION[5]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]: requested_broadcast_address = 1
DHCP4.OPTION[7]: requested_netbios_scope = 1
DHCP4.OPTION[8]: requested_wpad = 1
DHCP4.OPTION[9]: next_server = 0.0.0.0
DHCP4.OPTION[10]: expiry = 1471317244
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_subnet_mask = 1
DHCP4.OPTION[13]: dhcp_lease_time = 86400
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: ip_address = 192.168.1.10
DHCP4.OPTION[16]: requested_static_routes = 1
DHCP4.OPTION[17]: requested_domain_name_servers = 1
DHCP4.OPTION[18]: routers = 192.168.1.1
DHCP4.OPTION[19]: broadcast_address = 192.168.1.255
DHCP4.OPTION[20]: requested_ntp_servers = 1
DHCP4.OPTION[21]: requested_netbios_name_servers = 1
DHCP4.OPTION[22]: domain_name_servers = 192.168.1.1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: subnet_mask = 255.255.255.0
DHCP4.OPTION[25]: network_number = 192.168.1.0
DHCP4.OPTION[26]: requested_host_name = 1
DHCP4.OPTION[27]: dhcp_server_identifier = 192.168.1.1
IP6.ADDRESS[1]: fe80::99:136a:8178:e9be/64
IP6.GATEWAY:
IP6.DNS[1]: 2001:558:feed::1
IP6.DNS[2]: 2001:558:feed::2
GENERAL.DEVICE: enp0s25
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Intel Corporation
GENERAL.PRODUCT: 82579LM Gigabit Network Connection
GENERAL.DRIVER: e1000e
GENERAL.DRIVER-VERSION: 3.2.6-k
GENERAL.FIRMWARE-VERSION: 0.13-3
GENERAL.HWADDR: <MAC 'enp0s25' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:19.0/net/enp0s25
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
-- <MAC '' [AC6]> Infra 2 2417 MHz 54 Mbit/s 84 ▂▄▆█ WPA1 WPA2 no
Comcast <MAC 'Comcast' [AC4]> Infra 2 2417 MHz 54 Mbit/s 80 ▂▄▆_ WPA1 WPA2 no
-- <MAC '' [AC2]> Infra 2 2417 MHz 54 Mbit/s 74 ▂▄▆_ WPA1 WPA2 no
xfinitywifi <MAC 'xfinitywifi' [AC7]> Infra 2 2417 MHz 54 Mbit/s 74 ▂▄▆_ -- no
Comcast <MAC 'Comcast' [AC1]> Infra 2 2417 MHz 54 Mbit/s 72 ▂▄▆_ WPA2 yes *
TP-LINK_49E1 <MAC 'TP-LINK_49E1' [AC16]> Infra 11 2462 MHz 54 Mbit/s 54 ▂▄__ WPA2 no
rvac <MAC 'rvac' [AN7]> Infra 11 2462 MHz 54 Mbit/s 50 ▂▄__ WPA1 WPA2 no
DIRECT-56-HP OfficeJet 3830 <MAC 'DIRECT-56-HP OfficeJet 3830' [AN8]> Infra 6 2437 MHz 54 Mbit/s 47 ▂▄__ WPA2 no
2WIRE665 <MAC '2WIRE665' [AC14]> Infra 11 2462 MHz 54 Mbit/s 44 ▂▄__ WPA1 WPA2 no
eTours360 <MAC 'eTours360' [AN10]> Infra 6 2437 MHz 54 Mbit/s 40 ▂▄__ WPA2 no
ATTwIBX8I2 <MAC 'ATTwIBX8I2' [AC15]> Infra 1 2412 MHz 54 Mbit/s 34 ▂▄__ WPA1 WPA2 no
rvac <MAC 'rvac' [AC5]> Infra 1 2412 MHz 54 Mbit/s 34 ▂▄__ WPA1 WPA2 no
-- <MAC '
