[Bug 1947558] Re: rfkill fails to turn on wifi card on Dell Latitude 5490

2021-10-19 Thread Gilbert Fernandes
Found a fix :

Get into Bios (F2 At boot)
Go to : Power Management -> Wireless Radio Control -> Turn everything OFF

This prevents hardware lock of wifi card when going into suspend and
undocking from Dell dock.

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Title:
  rfkill fails to turn on wifi card on Dell Latitude 5490

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[Bug 1947558] Re: rfkill fails to turn on wifi card on Dell Latitude 5490

2021-10-18 Thread Gilbert Fernandes
Note : it might be a problem in the ilwifi driver. I am not sure.
Perhaps rf-kill does the block properly on suspend
But fails to unblock the card because the ilwifi driver does not bring it back 
from "hardware lock" to "available" on resume.
So I am not sure of where the problem is, but I tend to think that it's a 
ilwifi problem :/

https://bugs.launchpad.net/ubuntu/+source/backport-iwlwifi-
dkms/+bug/1947561

How can I make sure rfkill does ask properly to the kernel/module to
unlock the hardware wifi card, and confirm this is a ilwifi problem ?

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Title:
  rfkill fails to turn on wifi card on Dell Latitude 5490

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[Bug 1947558] Re: rfkill fails to turn on wifi card on Dell Latitude 5490

2021-10-18 Thread Gilbert Fernandes
tried to use rfkill to bring the wifi card back, fails :

after wake from suspend :

gilbert@alpha:~$ sudo rfkill list
1: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
2: dell-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
4: hci0: Bluetooth
Soft blocked: no
Hard blocked: no


trying to turn on :

gilbert@alpha:~$ sudo rfkill unblock 3
gilbert@alpha:~$ sudo rfkill 
ID TYPE  DEVICE  SOFT  HARD
 1 wlan  dell-wifi  unblocked unblocked
 2 bluetooth dell-bluetooth unblocked unblocked
 3 wlan  phy0   unblocked   blocked
 4 bluetooth hci0   unblocked unblocked

The RF Kill is done on suspend
And it does not work to bring the Wifi card ON when resuming the laptop.

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Title:
  rfkill fails to turn on wifi card on Dell Latitude 5490

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