I'm having a problem connecting to the internet..  I installed ubuntu 14.04 on my Lenovo Y50-70, dual boot with the pre-installed Windows 8 OS I had. I used  guide. Everything works perfectly, except for when I connect to WiFi networks on my Ubuntu. It seems to work well for some time (the best I got was a few minutes..), and then disconnects. After it disconnects for the first time, It won't connect again (to any WiFi network) until after I restart the computer.   If, however, I try to connect using an ethernet cable, everything goes down smoothly (no surprise-disconnects). I'd also like to point out that I don't get the same problem on my Windows OS.  I tried following several guides, none worked. Some technical things:   WiFi is enabled. sudo /etc/init.d/networking restart won't work. sudo iwconfig wlan0 power off; sudo iwconfig wlan0 power on won't work. restarting network manager doesn't help.
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I have installed Ubuntu 15.04 on my laptop with RTL8723BE Wi-fi card. But it is always disconnecting from network. I have tried echo "options rtl8723be fwlps=N ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf but that didn't helped. What can I do to prevent the wifi from disconnecting? If I upgrade to kernel 4.X, will it help?  ~$ lspci -knn | grep Net -A2  09:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]     Subsystem: Hewlett-Packard Company Device [103c:2231]     Kernel driver in use: rtl8723be   ~$ rfkill list 0: hci0: Bluetooth     Soft blocked: yes     Hard blocked: no 1: phy0: Wireless LAN     Soft blocked: no     Hard blocked: no   ~$ ifconfig &amp;&amp; iwconfig &amp;&amp; route -n &amp;&amp; ping -c 1 google.com eth0      Link encap:Ethernet  HWaddr 38:63:bb:cd:4a:7e             UP BROADCAST MULTICAST  MTU:1500  Metric:1           RX packets:3 errors:0 dropped:0 overruns:0 frame:0           TX packets:53 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:752 (752.0 B)  TX bytes:8445 (8.4 KB)  lo        Link encap:Local Loopback             inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP LOOPBACK RUNNING  MTU:65536  Metric:1           RX packets:3870 errors:0 dropped:0 overruns:0 frame:0           TX packets:3870 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            RX bytes:314613 (314.6 KB)  TX bytes:314613 (314.6 KB)  wlan0     Link encap:Ethernet  HWaddr c0:38:96:6d:c4:83             inet addr:192.168.1.205  Bcast:192.168.1.255  Mask:255.255.255.0           inet6 addr: fe80::c238:96ff:fe6d:c483/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:15240 errors:0 dropped:0 overruns:0 frame:0           TX packets:14627 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:14410285 (14.4 MB)  TX bytes:2192744 (2.1 MB)  eth0      no wireless extensions.  wlan0     IEEE 802.11bgn  ESSID:"DIR-615"             Mode:Managed  Frequency:2.437 GHz  Access Point: 00:90:4C:08:00:0D              Bit Rate=150 Mb/s   Tx-Power=20 dBm              Retry short limit:7   RTS thr=2347 B   Fragment thr:off           Power Management:off           Link Quality=70/70  Signal level=-22 dBm             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0           Tx excessive retries:0  Invalid misc:186   Missed beacon:0  lo        no wireless extensions.  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    400    0        0 wlan0 169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0 PING google.com.Dlink (172.26.136.19) 56(84) bytes of data. 64 bytes from 19.136.26.172.in-addr.arpa (172.26.136.19): icmp_seq=1 ttl=249 time=102 ms  --- google.com.Dlink ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 102.547/102.547/102.547/0.000 ms
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I'm a newbie in Linux environment. I have a really, REALLY, bad problem.  I installed on my Asus X53Sv Ubuntu 14.10 but I have a problem:  the wifi works because it can recognize available networks BUT it can't connect! After I click "connect" it try to connect but after a couple of seconds it disconnects and says: "Disconnected - you are now offline".  I have already read this topic:   But I don't understand very well what I have to do (because I have a different laptop) and I have no internet (the ethernet port doesn't work)!  I have the following setup:   Ubuntu: 14.10 Wifi: Atheros AR9285 Kernel: 3.16,0-23-generic   Anyone could help me, please?     @mchid OMG, really thanks! I solved with this command:  echo 'options ath9k nohwcrypt=1' | sudo tee -a /etc/modprobe.d/ath9k.conf   But before to mark your reply I hope you will help me to another problem.. During I tried a lot of attempts I touched something I shouldn't touch because now everytime I start the computer it says "System program detected"... What could it be?
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I recently upgraded from ubuntu 13.10 to ubuntu 14.04. Wifi (with ralink rt3290 card) was not working in ubuntu 13.10, but after the following the guide here, , it worked fine. But in ubuntu 14.04, no matter how much I try it does not work. Can anyone please figure out what the problem is and how to solve it.
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I yesterday upgraded from Windows to Ubuntu 15.04 but I have problem with my wireless adapter Intel Corporation Wireless 7260 (rev 73). It randomly loses internet connection. Restarting adapter always helps. (same it did with Windows, except that sometimes restarting adapter didn't help).   Additionally, I have weaker connection then I had with Windows.  Thank you!
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I'm sure the passphrase is correct 100% but Wifi keeps asking for authentication and never connects. What can I do? I've tried removing the networks, resetting the router, changing the password, rebooting Ubuntu, disabling IPv6.  Also, it worked until earlier today and then stopped. All my other devices log in fine.
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Connecting to the wireless is relatively simple.  After some struggle, you have wifi in your installer. You can install Ubuntu Server and everything is alright. You are ready to boot your new system.    After setup finished, wifi settings disappeared.  tl;dr: How do I connect to a wireless (WPA2 Personal) network from Ubuntu Server 12.10?    What I have tried so far:  Connected with iw* commands. Obtained IP address with dhclient. Put these commands to etc/rc.local.  On boot, the server waits 120 seconds with message "Waiting for network to come up"  To fix this, I removed everything /etc/network/interfaces (wpa-psk and wpa-ssid). This did not work. It was still waiting. I found an answer, which said I could just remove the /etc/... (the file that was in charge of the 120 second wait time.)    I did that, and kept a backup of it. Now the server waits ~3 seconds (modified sleep within the file) and boots up. However, there's no network connection available. It's some dhcp error.  As I was out of options, I tried using the one in comment. The one that used "tee". Turns out it does not work either.    How can this whole thing be so inconsistent? How can they not install the firmwares on the ISO while it would perfectly fit (673+~10MB = 683). How can the installer NOT copy the necessary files and set up the connection to be used later? (Or ask if the user wants to use it.)
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On this site I see hundreds if not a thousand questions being asked about issues with a Wireless LAN adapter not being detected/recognized by Ubuntu. Some mainstream adapters appear to be utterly broken in Linux support, while others just require some simple steps to get it to work.  The options to get it to work appear to be infinitely huge and I have no clue where to get started!  What is considered 'best practice'? What order of things to try is most efficient in terms of time, effort and imposes minimal risk to my Ubuntu installation? Please help me save time and guide me what to do, step by step.
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I can't connect to wifi with my laptop but I can connect to wifi with my phone, ps3 and ipod etc. I can actually connect to the internet with my laptop when I use a cable to connect to the router. Does anyone know what my problem is?  My connection worked perfectly before, but 3 days ago it just stopped working. I have windows 8. In the corner it just gives me a perfect bar connection and I cant find any solution on internet.  Thank you
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I am using Ubuntu 16.10 and recently I have not been able to connect to internet using Ethernet. The network manager shows device not managed. The WiFi network is working fine.      I've tried the solution from this questionn  with no use.  My /etc/network/interfaces file:  # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback   My /etc/NetworkManager/NetworkManager.conf file:  [main] plugins=ifupdown,keyfile,ofono dns=dnsmasq  [ifupdown] managed=true   Output of nmcli d:  DEVICE  TYPE      STATE      CONNECTION  wlp2s0  wifi      connected  eduroam     enp8s0  ethernet  unmanaged  --          lo      loopback  unmanaged  --
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I'm preparing for a trip where I can't bring my desktop, so I recently broke out my trusty old laptop (Dell Latitude E4300) to get it ready for the trip. Previously, I had Ubuntu 12.04 LTS on the machine and there were no problems with wifi or the computer in general. My original problem came when I tried to upgrade to Ubuntu 14.04, which failed halfway through and long story short: I couldn't get it to work. I then installed Lubuntu 14.04 (It's a moderately old laptop and I had never tried Lubuntu, so why not) and it's going great, except, I can't connect to my wifi and since this will be my only method of access on my vacation, I really need to fix it. I'm kinda at a cross roads since I've never had this problem with this laptop. Any help would be great.   The output of "lspci -nvn | grep -i net" Says the wifi card is a "Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] (rev 01)"  I have looked at many other similar questions, but they're all very old and none have helped. Sorry if you guys get this a lot.  EDIT: Here is the link to the requested diagnostics (See comment by user "wild man"_
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My wifi worked great on Ubuntu, until today where my wifi doesn't work anymore after turning on my pc. I don't see the wifi tab in the settings. I am running a dual boot and wifi still works on Windows. Wi-fi card: broadcom dw1530 wireless-n wlan half-mini card Which steps should I take to troubleshoot and fix this?
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I've just decided to jump into the world of Ubuntu, so far I encountered no problems until I tried to connect to my wireless network. I'm running Ubuntu on my laptop, Acer Aspire 5333-2880, which has an Acer Nplify 802.11b/g/n wireless card.  After browsing for an answer, I think the problem is a missing driver. input:   lspci | grep Network   output:     02:00.0 Network controller; Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)   I found a couple of answers that might be right, but I have problems with both of them.    It requires me to load the site in my laptop, but I can't do it without internet and I have no idea how to save this into a USB.  But I have no idea how to really run or use this, and I wouldn't like to screw it up.    Any advice or other possible solutions will be greatly appreciated!   EDIT.  Thanks a lot for your input Marko and Jorge. I am sure the problem was with one of the drivers, but I was too distracted, or tired yesterday to realize I didn't restart my computer after installing. As soon as I got turned on my computer again, it was working. Annoyingly, I am not sure what the problem was exactly nor what exactly fixed it.  But still, thanks a lot Marko for the intel on how to build packages, I am sure it will be very useful later on!
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I am running Ubuntu 14.04.01 LTS on an Acer V Nitro laptop which has an Intel Dual Band Wireless 7265 controller. The driver version is 3.13.0-45-generic with firmware 22.24.8.0. The connection is stable for 30-40 minutes and after, it disconnects. Are necessary several reconnect attempts, sometime a restart in order to reconnect to the WiFi network.   Did anyone face this issue with this controller? What do you recommend to diagnose the issue?
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First of all im sorry if this thread is duplicated with another one, but i didnt find a solution for the problem.  So i bought new laptop (Lenovo Y520) and setup dual boot Win10 with Ubuntu 16.04 and wireless doesnt work for the ubuntu (LAN works).  ifconfig  enp4s0    Link encap:Ethernet  HWaddr c8:5b:76:da:32:ba         inet addr:192.168.0.102  Bcast:192.168.0.255  Mask:255.255.255.0       inet6 addr: fe80::62bc:4b27:ec0f:1d9c/64 Scope:Link       UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1       RX packets:18584 errors:0 dropped:0 overruns:0 frame:0       TX packets:12706 errors:0 dropped:0 overruns:0 carrier:0       collisions:0 txqueuelen:1000        RX bytes:20071392 (20.0 MB)  TX bytes:1500456 (1.5 MB)  lo        Link encap:Local Loopback         inet addr:127.0.0.1  Mask:255.0.0.0       inet6 addr: ::1/128 Scope:Host       UP LOOPBACK RUNNING  MTU:65536  Metric:1       RX packets:1849 errors:0 dropped:0 overruns:0 frame:0       TX packets:1849 errors:0 dropped:0 overruns:0 carrier:0       collisions:0 txqueuelen:1        RX bytes:200236 (200.2 KB)  TX bytes:200236 (200.2 KB)   .  iwconfig  wlp3s0    IEEE 802.11  ESSID:off/any         Mode:Managed  Access Point: Not-Associated   Tx-Power=0 dBm          Retry short limit:7   RTS thr:off   Fragment thr:off       Power Management:on  enp4s0    no wireless extensions.  lo        no wireless extensions.   I ran some commands which found in another threads.  sudo lshw -class network   *-network                   description: Wireless interface    product: Intel Corporation    vendor: Intel Corporation    physical id: 0    bus info: pci@0000:03:00.0    logical name: wlp3s0    version: 78    serial: 00:28:f8:69:15:13    width: 64 bits    clock: 33MHz    capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless    configuration: broadcast=yes driver=iwlwifi driverversion=4.8.14-040814-generic firmware=22.361476.0 latency=0 link=no multicast=yes wireless=IEEE 802.11    resources: irq:332 memory:a4200000-a4201fff *-network    description: Ethernet interface    product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller    vendor: Realtek Semiconductor Co., Ltd.    physical id: 0    bus info: pci@0000:04:00.0    logical name: enp4s0    version: 10    serial: c8:5b:76:da:32:ba    size: 100Mbit/s    capacity: 1Gbit/s    width: 64 bits    clock: 33MHz    capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation    configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.0.102 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s    resources: irq:322 ioport:4000(size=256) memory:a4104000-a4104fff memory:a4100000-a4103fff   .  rfkill list  0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: yes 1: ideapad_bluetooth: Bluetooth Soft blocked: yes Hard blocked: yes 2: hci0: Bluetooth Soft blocked: yes Hard blocked: no 3: phy0: Wireless LAN Soft blocked: no Hard blocked: no   .  lspci -nnk | grep 0280 -A2  03:00.0 Network controller [0280]: Intel Corporation Device [8086:24fd] (rev 78) Subsystem: Intel Corporation Device [8086:1010] Kernel driver in use: iwlwifi   Things that i've tested and didnt worked.  * sudo rfkill unblock wifi * Additional Drivers -&gt; Not showing wifi driver * restart network-manager service * http://askubuntu.com/a/859263
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We just bought a Lenovo  (which is supposed to have the Intel 8265 for wireless). This laptop was bought in part because it is certified to run Ubuntu and as such to me at least it would make sense for things to work out of the box... but no such luck.  First, I installed Ubuntu 17.10 and after installation realised Wi-Fi was not working. I also tried Ubuntu 16.04 from a USB drive since that is the version of Ubuntu it is certified for, but no luck there either.  The wireless chip is not detected by lshw (or even lspci by the looks of it), ip link does not show a wireless interface, and the iwlwifi kernel module is not loaded at boot (I can load this myself using modprobe iwlwifi but this does not make Wi-Fi work). I think it is a combined Wi-Fi/Bluetooth chip, and Bluetooth does appear to work (or at least Bluetooth shows up in Gnome and rfkill list).  modinfo iwlwifi | grep 8265 shows me a file ending in -34 is supposedly loaded but only a file ending in -33 (and some other lower numbers) is present in /lib/firmware, if that helps).  I have also installed the Linux 4.14.9 kernel in an attempt to get things to work, but this did not resolve the issue either.  Further information  root@ThinkPad-E570:~# modinfo iwlwifi | grep 8265 firmware:       iwlwifi-8265-34.ucode root@ThinkPad-E570:~# rfkill list all 0: tpacpi_bluetooth_sw: Bluetooth     Soft blocked: no     Hard blocked: no 1: hci0: Bluetooth     Soft blocked: no     Hard blocked: no root@ThinkPad-E570:~# dmesg | grep iwl root@ThinkPad-E570:~# lspci -nnk | grep 0280 -A3 05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:c821]     Subsystem: Lenovo Device [17aa:c024]   Update  I just noticed that the laptop does not have an Intel wireless chip at all, but in fact has a Realtek one... which means that the  of the shop I bought this laptop at were not accurate... Sigh. Same problem stands, however, just with a crappier wireless chip.
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I recently upgraded to ubuntu 18.04 but I'm facing issues with the wired connection. First off, I must say that the wifi connection is working fine.  When I start my computed I don't even get the wired network icon. Going into the settings/Network parameters, I don't see anything about wired connection (only VPN and proxy).  Thus I tried to understand what was happening and I used a couple of different commands:  ~$ lshw -C network  WARNING: you should run this program as super-user. *-network                     description: Wireless interface    product: Wireless 8265 / 8275    vendor: Intel Corporation    physical id: 0    bus info: pci@0000:01:00.0    logical name: wlp1s0    version: 78    serial: 00:28:f8:f8:80:b8    width: 64 bits    clock: 33MHz    capabilities: bus_master cap_list ethernet physical wireless    configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-  22-generic firmware=34.0.1 ip=10.4.26.243 latency=0 link=yes multicast=yes wireless=IEEE 802.11    resources: irq:144 memory:dc100000-dc101fff *-network DISABLED    description: Ethernet interface    physical id: 2    logical name: enx3c18a070d46d    serial: 3c:18:a0:70:d4:6d    size: 1Gbit/s    capacity: 1Gbit/s    capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation    configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.09.9 duplex=full link=no multicast=yes port=MII speed=1Gbit/s   Then I decided to enable the ethernet interface as follows  sudo ip link set enx3c18a070d46d up   The result of the "lshw" command does not show DISABLED anymore. The wired connection icon came back but still no internet connection and now showed the following message  Wired unmanaged   I would be very interested if any of you have an idea about how to solve this problem.  Thank you and have a good day.  Finally, here are the results of a couple of commands (note that ifconfig is obsolete on ubuntu 18.04)  ~$ ip link show 1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN     mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: wlp1s0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000 link/ether 00:28:f8:f8:80:b8 brd ff:ff:ff:ff:ff:ff 3: enx3c18a070d46d: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc     fq_codel state UP mode DEFAULT group default qlen 1000 link/ether 3c:18:a0:70:d4:6d brd ff:ff:ff:ff:ff:ff  ~$ ip addr show 1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN  group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo    valid_lft forever preferred_lft forever inet6 ::1/128 scope host     valid_lft forever preferred_lft forever 2: wlp1s0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc mq state  UP group default qlen 1000 link/ether 00:28:f8:f8:80:b8 brd ff:ff:ff:ff:ff:ff inet 10.4.26.243/23 brd 10.4.27.255 scope global dynamic noprefixroute wlp1s0    valid_lft 42269sec preferred_lft 42269sec inet6 fe80::11e5:2546:9014:171b/64 scope link noprefixroute     valid_lft forever preferred_lft forever 3: enx3c18a070d46d: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc  fq_codel state UP group default qlen 1000 link/ether 3c:18:a0:70:d4:6d brd ff:ff:ff:ff:ff:ff inet6 fe80::3e18:a0ff:fe70:d46d/64 scope link     valid_lft forever preferred_lft forever
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I just installed Ubuntu 14.04.3 LTS after installing windows 10 in my new VN7-571G and the wireless is not working. It never had: even during the installation it was not recognized. I run a script to gather the data , which is . lspci -knn | grep Net -A2 output 03:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:003e] (rev 20)         Subsystem: Lite-On Communications Inc Device [11ad:0804]  The OS behaves like it has no wifi card. I do not see wifi settings in network settings I'm not a linux power user, so I do not know what to do to solve the issue. What should I do to make it work?