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Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 8:57 am
by VtPoet
This seems to be an ongoing problem with Linux Mint, and I've seen solutions for RTL drivers, but not for Qualcomm. Any help would be appreciated. At present the WIFI drops every three to four minutes.

Linux Mint Version:

System: Host: vtpoet-Lenovo-Yoga-2-11 Kernel: 5.2.11-050211-generic x86_64 bits: 64 Desktop: Cinnamon 4.2.3
Distro: Linux Mint 19.2 Tina


Network Controller

01:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
Subsystem: Lenovo QCA9565 / AR9565 Wireless Network Adapter [17aa:3026]
Kernel driver in use: ath9k
Kernel modules: ath9k

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 9:16 am
by JeremyB

Code: Select all

sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
systemctl restart network-manager.service
That might stop Network Manager from enabling wifi power management

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 9:22 am
by Larry78723
First,I would follow JeremyB's instructions at viewtopic.php?t=188887#p979059. I would also go back to the 4.15.0-58 kernel as the kernel you are using is not supported by Mint.

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 9:36 am
by VtPoet
Thanks. I'll try both. The Kernel upgrade was an attempt to fix the problem.

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 10:27 am
by VtPoet
Well.... Isn't that special. I just borked my system downgrading my kernel. Not a hundred percent sure it was me. Downgraded. Everything worked fine. Updated and upgraded. Apt recommended autoremove, and autoremove, I think, cleaned out all my kernels. All I'm left with is Memtest.

Am presently downloading live installer to do this:

Code: Select all

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 10:57 am
by JeremyB
That won't help if all kernels are gone. When you get the LIve ISO booted post results for

Code: Select all

sudo parted -l

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 11:29 am
by VtPoet
Well, boot repair got me back into my system. Apparently the kernels were still there. Something else took the hit. Probably grub itself. Anyway, I'm currently running kernel 4.18.0-04 which, I think, was just installed by Mint update.

Now to see if the WIFI problems continue.... good grief.

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 11:43 am
by VtPoet
Thanks Lex. So far so good with 4.18. But if it shows up again, I'll try the 5.0.0.25 kernel. Didn't have these problems until I upgraded to 19.2, but correlation doesn't equal causation.

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 11:48 am
by Pjotr
Disabling power management for the WiFi chipset, as JeremyB already advised, is very often beneficial in these case:
viewtopic.php?f=53&t=300993#p1680075

WiFi power management is the "usual suspect" for problems like this.

Re: Mint Keeps Dropping WIFI | Qualcomm Atheros QCA9565 / AR9565

Posted: Mon Sep 02, 2019 12:13 pm
by VtPoet
Pjotr wrote:
Mon Sep 02, 2019 11:48 am
Disabling power management for the WiFi chipset, as JeremyB already advised, is very often beneficial in these case:
viewtopic.php?f=53&t=300993#p1680075
Thanks Pjotr, I did check that and WIFI Power Management was OFF. Since switching back to 4.18, my WIFI connection hasn't dropped. So... so far so good, asides from borking my system and all.