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minomic

Member

Registered: 2017-09-30

Posts: 9

[Solved] [ASUS N551JX] No wifi after suspend

I have a well-known problem: if I suspend the computer and then re-start it, the wifi is gone. I'm using NetworkManager but restarting NetworkManager.service doesn't help, and neither does logging out and back in. Instead, to solve the issue, I have to restart the laptop altogether. Here are some info:

uname -a --> Linux michele-laptop 4.13.4-1-ARCH #1 SMP PREEMPT Thu Sep 28 08:39:52 CEST 2017 x86_64 GNU/Linux

If I check with "dmesg -w", I get

ath: phy0: DMA failed to stop in 10 ms

My controller is a Atheros AR9485. Here is all the information I could find. I also found a setting in the BIOS about power saving when suspended and I disabled it. I know that this problem already occurred to many people, but apparently no one was able to give a real and complete answer to the question. Also, the problem appeared quite recently, qhile before everything had always work without issues. All suggestions are highly welcome!

> iwconfig wlp4s0          
wlp4s0    IEEE 802.11  ESSID:"Village Hotspot"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 4C:5E:0C:C2:88:2F   
          Bit Rate=26 Mb/s   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=44/70  Signal level=-66 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:161   Missed beacon:0


> sudo lshw -class network             
[sudo] password for michele: 
  *-network                 
       description: Wireless interface
       product: AR9485 Wireless Network Adapter
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: wlp4s0
       version: 01
       serial: 40:e2:30:77:77:a9
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=4.13.4-1-ARCH firmware=N/A ip=192.168.2.49 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:18 memory:f7900000-f797ffff memory:f7980000-f798ffff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0.1
       bus info: pci@0000:05:00.1
       logical name: enp5s0f1
       version: 12
       serial: 08:62:66:b4:59:d1
       size: 10Mbit/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=half firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:35 ioport:d000(size=256) memory:f7814000-f7814fff memory:f7810000-f7813fff

Last edited by minomic (2017-10-10 12:01:35)

minomic

Member

Registered: 2017-09-30

Posts: 9

Re: [Solved] [ASUS N551JX] No wifi after suspend

After finding this discussion, I tried installing the linux-lts kernel. So now the situation is the following:

> uname -r
4.9.54-1-lts

Up to now, the problem seems fixed so it appears it really is a problem with the kernel 4.13.4. Hopefully, it will be fixed in the next release but, for the moment, I am happy like this.