Bug#914920: firmware-ralink: none

From	craig macdonald <zz.2008.10@orange.fr>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#914920: firmware-ralink: none
Date	2018-11-28 18:00 +0100
Message-ID	<wZblT-6Yt-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: firmware-ralink
Version: 20180825+dfsg-1
Severity: normal

Dear Maintainer,

Under Debian Buster, a usb wi-fi adapter D-link DWA-130, rev. F1 can 
display available wifi services but could not connect
to any of them. An "ip link" command shows:

wlx74dada1c2b5d: <NO-CARRIER, BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq 
state UP mode DORMANT group default qlen 1000
     link/ether 74:da:da:1c:2b:5d brd ff:ff:ff:ff:ff:ff

The same D-link usb wifi adapter installed on a same make and model 
computer but running under Debian Jessie works without problem, able to 
connect to any chosen wifi service.
On that Debian Jessie system, ip link shows:

wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode 
DORMANT group default qlen 1000
     link/ether 74:da:da:1c:2b:5d brd ff:ff:ff:ff:ff:ff

=== Workaround: ===
I am able to make the D-link usb wifi adapter work under Debian Buster 
by creating the file
/lib/udev/rules.d/70-wifi.rules

which contains this single line (address comes from device name 
"wlx74dada1c2b5d"):

SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="74:da:da:1c:2b:5d", 
NAME="wlan0"

After rebooting the Debian Buster system with that file in place, the 
D-link usb wifi adapter works, and "ip link" shows the now shorter 
device name:

wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode 
DORMANT group default qlen 1000
     link/ether 74:da:da:1c:2b:5d brd ff:ff:ff:ff:ff:ff

The workaround solution comes from:
https://askubuntu.com/questions/826325/how-to-revert-usb-wifi-interface-name-from-wlxxxxxxxxxxxxx-to-wlanx

The discussion in that thread mentions a (Ubuntu studio) kernel having a 
low latency, wondering whether the long device name is the source of the 
problem?

I have not tried forcing names other than "wlan0" to determine whether 
it is "wlan0" that is magical or whether other names would work.

I would expect the D-link usb wifi adapter to work under Debian Buster 
without this workaround, as the adapter works fine under Jessie.



-- System Information:
Debian Release: buster/sid
   APT prefers testing
   APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages firmware-ralink depends on:
ii  firmware-misc-nonfree  20180825+dfsg-1

firmware-ralink recommends no packages.

firmware-ralink suggests no packages.

-- no debconf information

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Bug#914920: firmware-ralink: none craig macdonald <zz.2008.10@orange.fr> - 2018-11-28 18:00 +0100
  Bug#914920: more information about the exact firmware being loaded craig macdonald <zz.2008.10@orange.fr> - 2018-11-29 19:50 +0100
  Bug#914920: marked as done (firmware-ralink: none) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2018-12-02 17:10 +0100

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