Wifi error popping up every few minutes in Kubuntu
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The internet seems to be somewhat working (after all, I'm here using it right now), but at least once a minute I have two "Network Management" error notifications that pop up in KDE that say "Connection Wired Connection 3 deactivated" and "Wired Interface e2x52e8ae7d39d1: IP configuration was unavailable". (I cannot post images here but here is a pastebin screenshot of the error message)
I checked the logs in /var/log/dmesg and saw that there were a ton of error messages in there that look like this:
You can try following action. Basically, the parameters has to be applied when the iwlwifi module is loaded. The parameters are dependent on kernel version.
1) Create the file, /etc/modprobe.d/iwl.conf
2) Add following lines to the above file.
options iwlwifi 11n_disable=1
options iwlwifi swcrypto=0
options iwlwifi bt_coex_active=0
options iwlwifi power_save=0
options iwlwifi uapsd_disable=1
You can try following action. Basically, the parameters has to be applied when the iwlwifi module is loaded. The parameters are dependent on kernel version.
1) Create the file, /etc/modprobe.d/iwl.conf
2) Add following lines to the above file.
options iwlwifi 11n_disable=1
options iwlwifi swcrypto=0
options iwlwifi bt_coex_active=0
options iwlwifi power_save=0
options iwlwifi uapsd_disable=1
options iwlmvm power_scheme=1
Thanks -- just so that I understand, before randomly altering settings, can you explain why these things would solve my issue?
jferments is asking if you can can you explain why disabling 802.11n, software crypto, Wifi/Bluetooth coexistence, Wifi power managerment, and U-APSD functionality will resolve the issue?
There is other advice online that recommends enabling software crypto, i.e. "options iwlwifi 11n_disable=1 swcrypto=1", and other advice suggesting "options iwlwifi 11n_disable=8" (which enables "antenna aggregation"; whatever that might be), and so on.
The presence of Bluetooth messages in the logs might indicate that "options iwlwifi bt_coex_active=0" is the only setting needed (or maybe it is needed in conjunction with others) - although since Linux kernel 5.8 that is already the default for some hardware, so it might also have no effect.
If you're making a blind guess with config that you happened to use in a similar situation, that's ok - but you should make it clear that's what you're doing.
jferments:
I can't help with what params/values will or will not solve your issue, but if you run "modinfo --parameters iwlwifi" (as root/sudo) it will output the parameters for the iwlwifi module along with short descriptions to give you a brief idea of what's what.
To view the current values of the parameters, you can use the /sys pseudo-filesystem to obtain them, via (e.g.) "tail /sys/module/iwlwifi/parameters/*" (doesn't need root, but might want to pipe via "less" if on a small non-scrolling terminal).
> jferments is asking if you can can you explain why disabling 802.11n, software crypto, Wifi/Bluetooth coexistence, Wifi power managerment, and U-APSD functionality will resolve the issue?
Based on error code, the WiFi driver can NOT work with other modules. Disabling these functionalities could help to solve the issue, special Wifi/Bluetooth coexistence.
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