Very Slow WiFi

Technical Issues and Assistance
#1

I'm having problems after migrating to Manjaro. The WiFi is very very slow, near to unusable. I have been trying some posts without any result.

Edit one

I was using Linux Mint and everyting was ok.

Edit two

cat /proc/net/wireless

 antonio@antonio-pc >  cat /proc/net/wireless

Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
wlp3s0: 0000   42.  -68.  -256        0      0      0      0  92314        0

Edit three

iw dev wlp3s0 link | grep -v "Connected to" | grep -v "SSID" && iw dev wlp3s0 get power_save

antonio@antonio-pc > iw dev wlp3s0 link | grep -v "Connected to" | grep -v "SSID" && iw dev wlp3s0 get power_save
	freq: 5260
	RX: 206971670 bytes (238950 packets)
	TX: 33774859 bytes (129842 packets)
	signal: -67 dBm
	tx bitrate: 433.3 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 1

	bss flags:	short-preamble short-slot-time
	dtim period:	2
	beacon int:	100
Power save: off

Edit four

inxi -Fxxxz

antonio@antonio-pc > inxi -Fxxxz
System:
  Host: antonio-pc Kernel: 4.19.13-1-MANJARO x86_64 bits: 64 compiler: gcc 
  v: 8.2.1 Desktop: Xfce 4.12.4 tk: Gtk 2.24.32 info: xfce4-panel wm: xfwm4 
  dm: LightDM 1.28.0 Distro: Manjaro Linux 
Machine:
  Type: Laptop System: ASUSTeK product: X550LA v: 1.0 serial: <filter> 
  Mobo: ASUSTeK model: X550LA v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: X550LA.509 date: 06/26/2014 
Battery:
  ID-1: BAT0 charge: 12.4 Wh condition: 12.5/38.5 Wh (32%) volts: 14.8/14.8 
  model: ASUSTeK X550A26 type: Li-ion serial: <filter> status: Charging 
  cycles: 627 
CPU:
  Topology: Dual Core model: Intel Core i5-4210U bits: 64 type: MT MCP 
  arch: Haswell rev: 1 L2 cache: 3072 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19161 
  Speed: 824 MHz min/max: 800/2700 MHz Core speeds (MHz): 1: 866 2: 812 
  3: 813 4: 825 
Graphics:
  Device-1: Intel Haswell-ULT Integrated Graphics vendor: ASUSTeK 
  driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0a16 
  Display: x11 server: X.org 1.20.3 driver: intel unloaded: modesetting 
  alternate: fbdev,vesa resolution: <xdpyinfo missing> 
  OpenGL: renderer: Mesa DRI Intel Haswell Mobile v: 4.5 Mesa 18.3.1 
  compat-v: 3.0 direct render: Yes 
Audio:
  Device-1: Intel Haswell-ULT HD Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 00:03.0 chip ID: 8086:0a0c 
  Device-2: Intel 8 Series HD Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 00:1b.0 chip ID: 8086:9c20 
  Sound Server: ALSA v: k4.19.13-1-MANJARO 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASUSTeK driver: r8168 v: 8.045.08-NAPI port: e000 bus ID: 02:00.1 
  chip ID: 10ec:8168 
  IF: enp2s0f1 state: down mac: <filter> 
  Device-2: Realtek RTL8821AE 802.11ac PCIe Wireless Network Adapter 
  vendor: AzureWave driver: rtl8821ae v: kernel port: d000 bus ID: 03:00.0 
  chip ID: 10ec:8821 
  IF: wlp3s0 state: up mac: <filter> 
  IF-ID-1: br-0a6f00db1bbe state: down mac: <filter> 
  IF-ID-2: docker0 state: down mac: <filter> 
Drives:
  Local Storage: total: 465.76 GiB used: 87.28 GiB (18.7%) 
  ID-1: /dev/sda vendor: Seagate model: ST500LT012-1DG142 size: 465.76 GiB 
  speed: 6.0 Gb/s rotation: 5400 rpm serial: <filter> rev: SDM1 scheme: GPT 
Partition:
  ID-1: / size: 444.58 GiB used: 87.28 GiB (19.6%) fs: ext4 dev: /dev/sda2 
  ID-2: swap-1 size: 12.78 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda3 
Sensors:
  System Temperatures: cpu: 40.0 C mobo: N/A 
  Fan Speeds (RPM): cpu: 2000 
Info:
  Processes: 193 Uptime: 30m Memory: 11.61 GiB used: 1.14 GiB (9.8%) 
  Init: systemd v: 239 Compilers: gcc: 8.2.1 Shell: zsh v: 5.6.2 
  running in: xfce4-terminal inxi: 3.0.28

I hope, someone can help me. Thanks!!!

1 Like
#2

Did you tried with another OS? Ubuntu live for example

#3

Yes, I was using Linux Mint and everything was ok.

#4

Can you send the result of
cat /proc/net/wireless
please?

#5

Sure!

 antonio@antonio-pc > cat /proc/net/wireless

Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
wlp3s0: 0000   42.  -68.  -256        0      0      0      0  92314        0
#6

And
iw dev wlan0 link | grep -v "Connected to" | grep -v "SSID" && iw dev wlan0 get power_save
?

#7

Of course! I have changed wlan0 by wlp3s0

antonio@antonio-pc > iw dev wlp3s0 link | grep -v "Connected to" | grep -v "SSID" && iw dev wlp3s0 get power_save
	freq: 5260
	RX: 206971670 bytes (238950 packets)
	TX: 33774859 bytes (129842 packets)
	signal: -67 dBm
	tx bitrate: 433.3 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 1

	bss flags:	short-preamble short-slot-time
	dtim period:	2
	beacon int:	100
Power save: off
#8

I came to this forum to report the same thing. It's been 1 or 2 weeks since it happened.

Could an update have caused this? I've been using manjaro for years with no issues.

#9

You could try this test to see if it improves your wifi's connection.

Unload the adapter module:

sudo modprobe -r rtl8821ae

Reload the adapter module with software encryption enabled & power saving disabled.

sudo modprobe rtl8821ae swenc=1 ips=0

or

sudo modprobe rtl8821ae debug=0 disable_watchdog=N fwlps=N swlps=Y swenc=Y ips=N msi=0

or

sudo modprobe rtl8821ae disable_watchdog=0 swlps=1 swenc=1 ips=0 fwlps=0 msi=1 debug=0 int_clear=0

This will alter the options of your driver temporarily until you reboot.

For a more permanent change to your adapters options you must create a driver configuration file

Create the following Realtek rtlwifi driver configuration file.

/etc/modprobe.d/rtl8821ae.conf

Copy and paste the following into the conf file:

options rtl8821ae swenc=1
options rtl8821ae ips=0
#options rtl8821ae rtw_power_mgnt=0
#options rtl8821ae rtw_enusbss=0
#options rtl8821ae swlps=1
#options rtl8821ae fwlps=0
#options rtl8821ae debug=1
#options rtl8821ae disable_watchdog=1
#options rtl8821ae msi=0
#options int_clear=0

You can test any of the other driver options in /etc/modprobe.d/rtl8821ae.conf by uncommenting the entry.

Simply remove the "#" sign in front of any option to enable that option.

Placing a comment ("#") in front of any option will disable the option change.

You can also try flipping 1 to 0, or, 0 to 1, to reverse enabling/disabling individual option settings.

Reboot after making any changes to the options in the rtl8821ae.conf file.

swenc=1 enables software encryption (prefered)
swenc=0 enables hardware encryption
ips=0 disables all power saving
swlps=1 enables software control of power saving
fwlps=0 disables firmware control of power saving
rtw_power_mgnt=0 disables power saving
rtw_enusbss=0 disables USB autosuspend (only for USB adapters)
disable_watchdog=1 disable watchdog, if receiving watchdog related errors
msi=1 Set to 1 to use MSI interrupts mode (default 1)
debug=1 Set debug level (0-5) (default 0)
int_clear=0 disable interrupt clear before set (default 1)

swenc=1 enables software encryption (prefered)
swenc=0 enables hardware encryption
ips=0 disables all power saving
swlps=1 enables software control of power saving
fwlps=0 disables firmware control of power saving
rtw_power_mgnt=0 disables power saving
rtw_enusbss=0 disables USB autosuspend (only for USB adapters)
disable_watchdog=1 disable watchdog, if receiving watchdog related errors
msi=1 Set to 1 to use MSI interrupts mode (default 1)
debug=1 Set debug level (0-5) (default 0)
ant_sel=2 rtl8723be driver allows the ant_sel parameter (value 1, or 2)

"ips=0" disables all power saving, rendering swlps and fwlp redundent
"swlps=0" is the default
fwlps=1 is default, meaning the FW controls the power saving
"swenc=1" disables the HW encryption
"fwlps", yes. 0/1 maps to N/Y, but you should use the values provided by modinfo (the parameters here are bool, but sometimes they're integer and then the outcome is arbitrary)
If you already tried "ips=0" (confirmed by systool output?) most of this is moot and the only things left are the swenc=0 parameter and downgrading the firmware.

1 Like
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#10

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