Aleksey_R wrote

Thanks for reply! Hardware version is "WR740N v4 00000000". At lest, this hardware version is displayed in 192.168.0.1.
I didn't try to update the wireless driver on my laptop. My driver version corresponds to 3.16 Linux kernel version. There's only one newer release, it's 3.17. Do you think I should try to use newer one?

Yeah, update the newer driver.

Thanks for reply and sorry for delay!
Yes, I have WPA/WPA2-Personal wireless network with AES enctrypting. I tired to change encryption method from AES to Auto, but that didn't help.
The WAN IP address is 77.122.206.51, the laptop address is 192.168.0.102.

Ada wrote

Yeah, update the newer driver.

I tried to share internet from my smartphone. The laptop didn't make smartphone's wireless nework fail, so I suppose that this is a router's problem.

By the way, here's example how connection disappears:

oleksii@OleksiiR:~> ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
.......
64 bytes from 8.8.8.8: icmp_seq=197 ttl=49 time=135 ms
64 bytes from 8.8.8.8: icmp_seq=198 ttl=49 time=55.6 ms
64 bytes from 8.8.8.8: icmp_seq=199 ttl=49 time=77.8 ms
From 192.168.0.102 icmp_seq=247 Destination Host Unreachable
From 192.168.0.102 icmp_seq=248 Destination Host Unreachable
From 192.168.0.102 icmp_seq=249 Destination Host Unreachable
From 192.168.0.102 icmp_seq=250 Destination Host Unreachable
^C
--- 8.8.8.8 ping statistics ---
275 packets transmitted, 187 received, +4 errors, 32% packet loss, time 276218ms
rtt min/avg/max/mdev = 55.639/247.453/4909.373/379.916 ms, pipe 5

The solution was rather unexpectable. I've removed "iwlwifi-7260-9.ucode" from /lib/firmware. Kernel now uses "iwlwifi-7260-8.ucode" and everything works OK.

Best regards,
Oleksii

Hello Oleksii,

I am having exactly the same problem with the same router (TL-WR740N), except the laptop is a Lenovo Thinkpad running Windows.

Do you think there might be another solution to this issue, besides rolling back to an earlier version of the WiFi driver? To me, it's pretty obvious that the router is the culprit.

Best regards,
Dmytro

I solved this issue by updating to the latest official firmware of the router.