mirror of
https://github.com/Qubes-Community/Contents.git
synced 2024-09-21 16:25:36 +00:00
122 lines
4.2 KiB
Markdown
122 lines
4.2 KiB
Markdown
---
|
|
layout: doc
|
|
title: Wireless Troubleshooting
|
|
permalink: /doc/wireless-troubleshooting/
|
|
redirect_from:
|
|
- /en/doc/wireless-troubleshooting/
|
|
---
|
|
|
|
Wireless Troubleshooting Guide
|
|
==============================
|
|
|
|
These instructions may help with suspend/resume issues for more devices than just wireless cards, that is just the (unfortunately not uncommon) example used here.
|
|
|
|
Resetting wireless cards by reloading drivers
|
|
---------------------------------------------
|
|
|
|
If your wireless card works, but after suspending and resuming your computer, the Network-Manager applet just says "Device not ready", then try un-loading and re-loading the driver.
|
|
|
|
### Determining your wireless card driver ###
|
|
|
|
First, determine which kernel module corresponds to your wireless card. There are several ways to do this.
|
|
|
|
The easiest is via the output of `lspci -k` in your sys-net VM:
|
|
|
|
~~~
|
|
[user@sys-net ~]$ lspci -k
|
|
00:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
|
|
Subsystem: Intel Corporation Device 0130
|
|
Kernel driver in use: iwlwifi
|
|
Kernel modules: iwlwifi
|
|
~~~
|
|
|
|
Here we see that the machine in question has an Intel wireless card, being used by the `iwlwifi` kernel module.
|
|
|
|
|
|
### Checking logs for relevant messages ###
|
|
|
|
View the output of `dmesg` in sys-net, and check if you see a bunch of wireless related errors. Depending on your hardware, they may look like the following (or not):
|
|
|
|
~~~
|
|
iwlwifi 0000:00:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
|
|
iwlwifi 0000:00:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
|
|
...
|
|
IPv6: ADDRCONF(NETDEV_UP): wlp0s0: link is not ready
|
|
iwlwifi 0000:00:00.0: L1 Enabled - LTR Enabled
|
|
iwlwifi 0000:00:00.0: L1 Enabled - LTR Enabled
|
|
iwlwifi 0000:00:00.0: Failed to load firmware chunk!
|
|
iwlwifi 0000:00:00.0: Could not load the [0] uCode section
|
|
iwlwifi 0000:00:00.0: Failed to start INIT ucode: -110
|
|
iwlwifi 0000:00:00.0: Failed to run INIT ucode: -110
|
|
...
|
|
iwlwifi 0000:00:00.0: Direct firmware load for iwlwifi-8000C-18.ucode failed with error -2
|
|
~~~
|
|
|
|
### Seeing what modules you have loaded ###
|
|
|
|
You can check which drivers are currently loaded with `lsmod`, and view details about a module with `modinfo <module_name>`.
|
|
|
|
For example, we list what modules we have loaded:
|
|
|
|
~~~
|
|
[user@sys-net ~]$ lsmod
|
|
Module Size Used by
|
|
iwlmvm 315392 0
|
|
iwlwifi 155648 1 iwlmvm
|
|
mac80211 708608 1 iwlmvm
|
|
cfg80211 557056 3 iwlwifi,mac80211,iwlmvm
|
|
...
|
|
~~~
|
|
|
|
and check one:
|
|
|
|
~~~
|
|
[user@sys-net ~]$ modinfo iwlmvm | grep -E '^(description|author|depends):'
|
|
author: Copyright(c) 2003- 2015 Intel Corporation <ilw@linux.intel.com>
|
|
description: The new Intel(R) wireless AGN driver for Linux
|
|
depends: iwlwifi,mac80211,cfg80211
|
|
~~~
|
|
|
|
Hey, it's our wireless driver!
|
|
|
|
Now, check if reloading the module makes wireless work again:
|
|
|
|
~~~
|
|
[user@sys-net ~]$ sudo rmmod iwlmvm
|
|
[user@sys-net ~]$ sudo modprobe iwlmvm
|
|
~~~
|
|
|
|
and try reconnecting to a network that is known to work.
|
|
|
|
If that is successful, see below about having Qubes automatically reload the driver for you. If not, try also reloading some dependent modules, in our example we must also reload iwlwifi:
|
|
|
|
~~~
|
|
[user@sys-net ~]$ modinfo iwlwifi | grep -E '^(description|author|depends):'
|
|
author: Copyright(c) 2003- 2015 Intel Corporation <ilw@linux.intel.com>
|
|
description: Intel(R) Wireless WiFi driver for Linux
|
|
depends: cfg80211
|
|
~~~
|
|
|
|
~~~
|
|
[user@sys-net ~]$ sudo rmmod iwlmvm
|
|
[user@sys-net ~]$ sudo rmmod iwlwifi
|
|
[user@sys-net ~]$ sudo modprobe iwlwifi # note the reverse order of loading/unloading
|
|
[user@sys-net ~]$ sudo modprobe iwlmvm
|
|
~~~
|
|
|
|
Automatically reloading drivers on suspend/resume
|
|
-------------------------------------------------
|
|
|
|
If reloading the driver (which resets the hardware into a known-state) resolves your issue when done manually, you can have Qubes automatically un/reload them on suspend & resume by listing the relevant modules in `/rw/config/suspend-module-blacklist`.
|
|
|
|
In the above example, it would look like this:
|
|
|
|
~~~
|
|
[user@sys-net config]$ cat /rw/config/suspend-module-blacklist
|
|
# You can list here modules you want to be unloaded before going to sleep. This
|
|
# file is used only if the VM has any PCI device assigned. Modules will be
|
|
# automatically loaded after resume.
|
|
iwlmvm
|
|
iwlwifi
|
|
~~~
|