[elrepo] USB wireless adapter not working (4.15)

[Mahmood Naderan]

So the output is

Bus 005 Device 006: ID 2001:3310 D-Link Corp.
$ grep -i 2001 /lib/modules/$(uname -r)/modules.alias | grep -i 3310
alias usb:v2001p3310d*dc*dsc*dp*ic*isc*ip*in* r8188eu
$ uname -r
4.15.10-1.el7.elrepo.x86_64
$ lsmod | head
Module                  Size  Used by
r8188eu               421888  0
cfg80211              618496  1 r8188eu
rfkill                 28672  1 cfg80211
fuse                  102400  3
xt_CHECKSUM            16384  1
ipt_MASQUERADE         16384  3
nf_nat_masquerade_ipv4    16384  1 ipt_MASQUERADE
tun                    36864  1
ip6t_rpfilter          16384  1



As I run the wpa_supplicant, I get an error where there is a problem
with initializing the driver.


$ ifconfig -a | grep -A 5 wl
wlp36s0f3u3: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 10:62:eb:30:9c:34  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
$ sudo wpa_supplicant -i wlp36s0f3u3 -c
/etc/wpa_supplicant/wpa_supplicant.conf -B
Successfully initialized wpa_supplicant
nl80211: Driver does not support authentication/association or connect commands
nl80211: deinit ifname=wlp36s0f3u3 disabled_11b_rates=0
wlp36s0f3u3: Failed to initialize driver interface



Regards,
Mahmood




On Fri, Mar 16, 2018 at 10:12 PM, Alan Bartlett <ajb at elrepo.org> wrote:
> On 15 March 2018 at 16:54, Mahmood Naderan <mahmood.nt at gmail.com> wrote:
>> Hi,
>> I upgraded the default 3.10 on centos 7 to 4.15 via the elrepo rpm
>> packages. I have a D-Link DWA 123 wireless dongle which is working on
>> ubuntu with kernel 4.10. However, with centos 7 it doesn't work and
>> the blue LED is off. As I attach the adapter, I see the following
>> messages in the log
>>
> <snip>
>>
>> Any idea to fix that? Does kernel correctly load the module?
>>
>> Regards,
>> Mahmood
>
> My suggestion is that you --
>
> * First upgrade to kernel-ml-4.15.10-1.el7.elrepo, which was released
> yesterday. [1]
>
> * Once the system has been rebooted and with the wireless dongle
> unplugged, capture the state of the USB sub-systems; lsusb > usb-1.txt
>
> * Now plug in the USB wireless dongle and, once again capture the
> state of the USB sub-systems; lsusb > usb-2.txt
>
> * Perform a diff on those two textual files and note the Vendor and
> Device ID pairing for the wireless dongle.
>
> * Perform a "double grep" on the modules.alias file for the Vendor and
> Device ID pairing. Note the module name displayed, if any.
>
> Real-world example --
>
> [Duo2 tmp]$ lsusb > usb-1.txt
> [Duo2 tmp]$ lsusb > usb-2.txt
> [Duo2 tmp]$ diff usb-1.txt usb-2.txt
> 0a1
>> Bus 002 Device 002: ID 0b95:7720 ASIX Electronics Corp. AX88772
> [Duo2 tmp]$ grep -i 0b95 /lib/modules/$(uname -r)/modules.alias | grep -i 7720
> alias usb:v0B95p7720d*dc*dsc*dp*ic*isc*ip*in* asix
> [Duo2 tmp]$
>
> The Vendor and Device ID pairing for the device used in my example is
> 0b95:7720 and, via the double grep, we see that the asix module is
> required.
>
> With the required module known, it should be easy to see if it has
> been loaded; lsmod | head
>
> Alan.
>
> [1] http://lists.elrepo.org/pipermail/elrepo/2018-March/004164.html
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