Wireless connection failing in Mint 17 cinnamon

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mmichaelc

Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Hi,

I have an issue with my wireless connection failing after a random amount of time.
It connects to the router fine without problems but after a few minutes - 20 minutes, everything network related stops working (ping, name resolution).
I've trawled through lots of searches and forums but found no solution.

I've tried 2 different wireless cards:
- Asus PCE-N53 PCI-E card (https://wikidevi.com/wiki/ASUS_PCE-N53) which has the RT5592 chipset.
- Edimax EW-7811UN USB adapter (https://wikidevi.com/wiki/Edimax_EW-7811Un) which has the RTL8188CUS chipset.

I found out that the chipset in the asus card was not very good on linux so I bought the usb one thinking that was the problem, but it's still the same.

Here is the output from mintwifi:

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mintwifi
-------------------------
* I. scanning WIFI PCI devices...
-------------------------
* II. querying ndiswrapper...
-------------------------
* III. querying iwconfig...
eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"SKY73794"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 7C:4C:A5:01:78:25   
          Bit Rate=7.2 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          Link Quality=46/70  Signal level=-64 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:151   Missed beacon:0

-------------------------
* IV. querying ifconfig...
eth0      Link encap:Ethernet  HWaddr d8:50:e6:bd:9b:60  
          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)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:226 errors:0 dropped:0 overruns:0 frame:0
          TX packets:226 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:20278 (20.2 KB)  TX bytes:20278 (20.2 KB)

wlan0     Link encap:Ethernet  HWaddr 80:1f:02:fd:8a:c5  
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7715 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7985 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6845993 (6.8 MB)  TX bytes:1604919 (1.6 MB)

-------------------------
* V. querying DHCP...
RTNETLINK answers: File exists
-------------------------
* VI. querying nslookup google.com...
Server:		192.168.0.1
Address:	192.168.0.1#53

Non-authoritative answer:
Name:	google.com
Address: 74.125.230.105
Name:	google.com
Address: 74.125.230.103
Name:	google.com
Address: 74.125.230.100
Name:	google.com
Address: 74.125.230.99
Name:	google.com
Address: 74.125.230.101
Name:	google.com
Address: 74.125.230.98
Name:	google.com
Address: 74.125.230.97
Name:	google.com
Address: 74.125.230.104
Name:	google.com
Address: 74.125.230.96
Name:	google.com
Address: 74.125.230.110
Name:	google.com
Address: 74.125.230.102

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inxi -N
Network:   Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169 
           Card-2: Edimax EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS] driver: rtl8192cu
The one thing I've observed is the ip routing table seems to change.
Normally it's like this:

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route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         SkyRouter.Home  0.0.0.0         UG    0      0        0 wlan0
192.168.0.0     *               255.255.255.0   U     9      0        0 wlan0

ip route
default via 192.168.0.1 dev wlan0  proto static 
192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3  metric 9
But when it stops working:

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route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.0.1     0.0.0.0         UG    0      0        0 wlan0
192.168.0.0     *               255.255.255.0   U     9      0        0 wlan0

ip route
default via 192.168.0.1 dev wlan0  proto static 
192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3  metric 9
At which point even pinging the router fails:

ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
^C
--- 192.168.0.1 ping statistics ---
14 packets transmitted, 0 received, 100% packet loss, time 13104ms

Occasionally ping shows 192.168.0.3 (my computer) as host unreachable (???)

Turning wifi off then back on again in network manager temporarily fixes it.

Many thanks for any help!

Michael
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Also, don't think it's the router as my phone (android) and xbox never have problems.

In case it's useful, output of ip monitor:

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3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default 
    link/ether 80:1f:02:fd:8a:c5 brd ff:ff:ff:ff:ff:ff
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> 
    link/ether 
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 
    link/ether 80:1f:02:fd:8a:c5
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state DORMANT group default 
    link/ether 80:1f:02:fd:8a:c5 brd ff:ff:ff:ff:ff:ff
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> 
    link/ether 
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> 
    link/ether 
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default 
    link/ether 80:1f:02:fd:8a:c5 brd ff:ff:ff:ff:ff:ff
ff00::/8 dev wlan0  table local  metric 256 
fe80::/64 dev wlan0  proto kernel  metric 256 
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 
    link/ether 80:1f:02:fd:8a:c5
Deleted fe80::/64 dev wlan0  proto kernel  metric 256 
Deleted ff00::/8 dev wlan0  table local  metric 256 
Deleted 3: wlan0    inet6 fe80::821f:2ff:fefd:8ac5/64 scope link tentative 
       valid_lft forever preferred_lft forever
ff00::/8 dev wlan0  table local  metric 256 
fe80::/64 dev wlan0  proto kernel  metric 256 
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 
    link/ether 80:1f:02:fd:8a:c5
3: wlan0    inet6 fe80::821f:2ff:fefd:8ac5/64 scope link 
       valid_lft forever preferred_lft forever
local fe80::821f:2ff:fefd:8ac5 dev lo  table local  proto none  metric 0 
3: wlan0    inet 192.168.0.3/24 brd 192.168.0.255 scope global wlan0
       valid_lft forever preferred_lft forever
local 192.168.0.3 dev wlan0  table local  proto kernel  scope host  src 192.168.0.3 
broadcast 192.168.0.255 dev wlan0  table local  proto kernel  scope link  src 192.168.0.3 
192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3 
broadcast 192.168.0.0 dev wlan0  table local  proto kernel  scope link  src 192.168.0.3 
Deleted 192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3 
192.168.0.0/24 dev wlan0  proto kernel  scope link  src 192.168.0.3  metric 9 
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 REACHABLE
default via 192.168.0.1 dev wlan0  proto static 

// STOPS WORKING HERE

Deleted fe80::/64 dev wlan0  proto kernel  metric 256 
Deleted ff00::/8 dev wlan0  table local  metric 256 
delete ff02::1:fffd:8ac5 dev wlan0 lladdr 33:33:ff:fd:8a:c5 NOARP
delete ff02::16 dev wlan0 lladdr 33:33:00:00:00:16 NOARP
delete ff02::2 dev wlan0 lladdr 33:33:00:00:00:02 NOARP
Deleted 3: wlan0    inet6 fe80::821f:2ff:fefd:8ac5/64 scope link 
       valid_lft forever preferred_lft forever
Deleted local fe80::821f:2ff:fefd:8ac5 dev lo  table local  proto none  metric 0 
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> 
    link/ether 
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> 
    link/ether 
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
192.168.0.1 dev wlan0 lladdr 7c:4c:a5:01:78:24 STALE
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JohnBobSmith

Re: Wireless connection failing in Mint 17 cinnamon

Post by JohnBobSmith »

I dont notice anything really odd that jumps out at me (I'm not a network admin, just a hobbyist). Have you tried installing any drivers? My internal card which is a

Code: Select all

Network:   Card-1: Ralink RT3290 Wireless 802.11n 1T/1R PCIe driver: rt2800pci
Would do exactly the same thing. By "exactly the same thing" I mean it worked intermittently. What I ended up doing was going for a different, external adapter. Seems like you already tried this approach though. Make suer only one adapter is plugged in at a time. Or, in the case of internal adapters, make sure the one your not using is disabled/not connected.

Beyond drivers, not sure at this time what the issue is. Go ahead and try installing drivers, and hopefully a network guru will be able to assist further. :)
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Thanks, I'll look for some other drivers.
I got this adapter because the driver was included in the kernel though...
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JeremyB
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Posts: 13848
Joined: Fri Feb 21, 2014 8:17 am

Re: Wireless connection failing in Mint 17 cinnamon

Post by JeremyB »

What does this command return in terminal

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dmesg | grep -i firmware
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Code: Select all

dmesg | grep -i firmware
[    0.185424] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    3.661468] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
thanks
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JeremyB
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Posts: 13848
Joined: Fri Feb 21, 2014 8:17 am

Re: Wireless connection failing in Mint 17 cinnamon

Post by JeremyB »

Might need a better diagnostic view of things, so I will have you install pastebin and run a diagnostic script

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sudo apt-get install pastebinit

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wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script

Code: Select all

pastebinit wireless-info.txt
Just copy and paste the resulting URL from the last terminal command
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Pastebin successful:

http://pastebin.com/7Fpx6Sy4

thanks
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JeremyB
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Posts: 13848
Joined: Fri Feb 21, 2014 8:17 am

Re: Wireless connection failing in Mint 17 cinnamon

Post by JeremyB »

I would change the settings in Network Manager for your connection for IPv6 to ignore and use Mint Update Manager to update your kernel. In Update Manager click View, then Linux Kernels and install 3.13.0-39, reboot and see if it is better
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Turned off ip6, updated kernel, rebooted.
Worked for about 10 minutes then went again. :(

I ran that script again while it wasn't working, had to pastebinit manually after turning wireless off and on.

http://pastebin.com/YR7yCnvm

Thanks!
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Long shot but could my router be sending something specifically to my computer?
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JeremyB
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Posts: 13848
Joined: Fri Feb 21, 2014 8:17 am

Re: Wireless connection failing in Mint 17 cinnamon

Post by JeremyB »

mmichaelc wrote:Long shot but could my router be sending something specifically to my computer?
It almost looks to be power management or firewall related. With the RTL PCIe card drivers there are parameters that can be set that help but no such parameters for the USB cards. I will have to search to see if there is anything new in the latest kernel that might help
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Ok, thanks
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Daraxil

Re: Wireless connection failing in Mint 17 cinnamon

Post by Daraxil »

Was there ever a fix for this, I have the exact same symptoms...
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mmichaelc

Re: Wireless connection failing in Mint 17 cinnamon

Post by mmichaelc »

Hi, Sorry for not keeping the thread updated guys.
I updated to kernel 3.13.0-39 but still had no luck.

I ended up buying a powerline adapter and just using ethernet which works flawlessly.
Obviously it would be useful to know what is causing the issue as it could be something that hasn't been tested before.
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darkstrike
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Location: Mahone Bay, Nova Scotia, Canada

Re: Wireless connection failing in Mint 17 cinnamon

Post by darkstrike »

Hi guys, it's not really a fix, but a weird workaround....I have the same issue on my MSI Wind U100 netbook which has a Realtek 8187SE WiFi chipset. Ethernet works flawlessly, but my WiFi does the same as yours does....fails after a random amount of time, and a restart seems to be the only thing that fixed it.

HOWEVER, I noticed the other day, when it "failed" - I put the laptop to sleep and immediately woke it up and WiFi was back. I've now done this every time the WiFi "fails" and it always comes back after I put the laptop to sleep and wake it up...much quicker than having to do a full restart as well.....maybe give it a shot and let us know if it works for you..?

Like I said, I know it's not a fix, but at least it's something!
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