#Wifi slower than usual

57 messages · Page 1 of 1 (latest)

jovial carbon
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this may not be mint specific and more linux specific, but im not sure so i put in here.

the first weeks after i installed linux mint on my new pc, i had 25-30 Mbits/s download wifi speed. On other devices at the same spot, i have similar, and on my windows boot i have the same speed.

But then after a couple weeks, the wifi was way slower. Like 1 - 3 Mbits/s.
Even after rebooting many times, it wouldnt go. I tried fixing it, but it didnt work (what i tried i will tell later). After about a week or some, the wifi speed was back to normal, but only for a few days, then it was slow again. For many weeks...
during all that time, i had normal speeds on windows tho.
Although the one time, i tested the windows speed for longer, i found out it was inconsistent. Every few minutes, it just didnt work at all, but then back to normal short after. But that was only one day, i should try that more often to check if it wasnt only that day like this.

What i tried already:

  • rebooting and reconnecting (of course i did, many times)
  • reinstalling linux-firmware
  • turning off wifi power save mode
  • updating my system (it is 100% up to date)

i would really appreciate help, this has been annoying me for so long.
If you need details like motherboard or whatever, just ask, i can give. I might drop some things, i think could play a role below.

Thanks wavecat

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i forgot to say:
i already had twice times normal speed again, but after the next time rebooted, it was slow again

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Motherboard: Gigabyte B650 EAGLE AX

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bios is also up to date, if that matters

jovial carbon
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I tested the wifi on windows again, and it did work without problems

jovial carbon
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i checked for like the third time, turning off wifi power saving doesnt help

jovial carbon
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anyone has an idea, i really dont know what to do 😭 😭

stoic island
jovial carbon
# stoic island Post results from terminal for `nmcli con show`

here it is
NAME UUID TYPE DEVICE FRITZ!Box 7590 UX 2,4 bc3e838e-ca41-482a-9658-285b2b3cce33 wifi wlp9s0 lo 6ce913b7-dc45-448a-b6a4-37b8b50d5faa loopback lo Auto DTUBI-93131775 8f640a3c-36cc-4041-a6da-13874f30e3d7 wifi -- Auto FRITZ!Box 7590 SZ 3dc61226-9515-466c-98c3-f15dd535d1b4 wifi -- FRITZ!Box 7590 NT ce8964d2-9505-40f7-9b7c-8592b6fb6401 wifi -- Wired connection 1 9143c9d9-76d2-3331-874c-e12725358020 ethernet --

stoic island
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Try nmcli connection modify bc3e838e-ca41-482a-9658-285b2b3cce33 802-11-wireless.powersave 2 then reboot

jovial carbon
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ok

stoic island
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May want to run that command using the UUID for the other wifi connection too

jovial carbon
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it worked, im back to normal speed
but i might need to test if it is consistent, on the first test it didnt seem consistent, but on the second it was

stoic island
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nmcli connection modify 8f640a3c-36cc-4041-a6da-13874f30e3d7 802-11-wireless.powersave 2

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nmcli connection modify ce8964d2-9505-40f7-9b7c-8592b6fb6401 802-11-wireless.powersave 2

jovial carbon
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ok, so what did those commands do?
it seems to do something with the power save mode, is it just turning it off?
will this change work after a reboot, or do i need to configure something?

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but it seems to work great rn

stoic island
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I don't think that will change. I have used it on this computer

jovial carbon
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ok, thanks for the help, i was so close to just giving up

stoic island
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That is a trick I found on Ubuntu Discourse

jovial carbon
stoic island
jovial carbon
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do you mean those urls?

Pastebin successful:

https://termbin.com/g984

https://termbin.com/5ttr
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i did run it, do i need to know what it did

stoic island
jovial carbon
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yeah, i did a lot of informations

stoic island
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It tells me you didn't really disable power save, run in terminal sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

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sudo iwconfig wlp9s0 power off

stoic island
jovial carbon
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still slow sadpepe

stoic island
jovial carbon
stoic island
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Try echo "options iwlwifi 11n_disable=8"|sudo tee /etc/modprobe.d/iwl-fix.conf then reboot. Seems the errors at the bottom is the result of some bug that doesn't like the command iwlist scan that is in the script

jovial carbon
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i did, should i run that ./wireless-info && cat wireless-info.txt|nc termbin.com 9999 again

stoic island
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No, lets do sudo dmesg|grep iwl|nc termbin.com 9999

jovial carbon
stoic island
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You ran the wireless-script command?

jovial carbon
stoic island
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So you haven't run the wireless-script since reboot?

jovial carbon
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you mean this ./wireless-info , right?
i think i actually did run this, but not sure. after i asked if i should run it, i already ran it cuz i thought i needed it

stoic island
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Reboot and just run sudo dmesg|grep iwl|nc termbin.com 9999

jovial carbon
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did

stoic island
# jovial carbon did

Run wget -N -t 5 -T 10 https://github.com/jeremyb31/wireless-info/raw/master/wireless-info && chmod +x wireless-info && ./wireless-info choose to upload at the end and post URL

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I removed the command causing the issue

jovial carbon
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also btw if it helps,
the upload wifi speed is changed very little or not at all, its still as fast as it should be

jovial carbon
stoic island
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Are other devices having faster downloads?

jovial carbon
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yes, other devices have a the usual download speed, about 30 Mbits/s
it has always been so

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on my laptop where i also installed linux mint, but didnt do much on, is slow too tho

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its also has about 1-3 Mbits/s

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my phone and when i switch to windows have the normal speed, as described in the post

stoic island
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Can you change the channel the wifi router uses?

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The results show 2 access points with the same name on the same channel, might be better if one was on channel 6 or higher

jovial carbon