Driver support for RTL8188{C,CU,CUS} wifi chips

Petros Aggelatos petrosagg at gmail.com
Wed Mar 4 09:01:08 EST 2015


Hi Mark,

You were right about the latest drivers. The reason they wouldn't work
for me is because the Raspberry Pi foundation disabled the rtlwifi
driver from their tree in 2012 [1] and it has been like that since.
After I patched the sources to actually compile rtlwifi it worked
fine, I didn't even had to add the RFC patches you pointed me at.

[1] https://github.com/raspberrypi/linux/commit/a9dd0a015a3a3f9809d58735247caeee5614a068

Thanks a lot for your help,
Petros

On 26 February 2015 at 11:27, Petros Aggelatos <petrosagg at gmail.com> wrote:
> Hi Mark,
>
> Thanks a lot for the pointer. I'll try the patches and see if they
> work. It's not so trivial as I'm using the Edimax on a Raspberry Pi
> but I don't see why they wouldn't work.
>
> Regards,
> Petros
>
> On 26 February 2015 at 00:30, Mark Cave-Ayland
> <mark.cave-ayland at ilande.co.uk> wrote:
>> On 25/02/15 20:13, Petros Aggelatos wrote:
>>
>>> Hi,
>>>
>>> I have an Edimax wifi adapter which uses the RTL8188CU chipset but it
>>> doesn't work in AP mode with the current hostapd/wpa_supplicant.
>>>
>>> This is the error I'm getting:
>>>
>>> nl80211: Driver does not support authentication/association or connect
>>> commands
>>> nl80211: Remove monitor interface: refcount=0
>>> netlink: Operstate: ifindex=4 linkmode=0 (kernel-control), operstate=6
>>> (IF_OPER_UP)
>>> nl80211: Set mode ifindex 4 iftype 2 (STATION)
>>> nl80211: Failed to set interface 4 to mode 2: -19 (No such device)
>>> nl80211 driver initialization failed.
>>>
>>> After looking around it turns out Realtek had once released a modified
>>> hostapd (back in version 0.8.0) that indeed makes the chipset work. I
>>> also found a Github repo of just the patches modified to work with
>>> modern versions of hostapd [1].
>>>
>>> My question is if accepting these patches upstream is something that you
>>> want. I'm currently trying to make them work with the latest git tree
>>> because I need it for a project I work on and it would be really nice if
>>> this chipset was supported out of the box.
>>
>> The official Realtek driver has been dead and unsupported for a very
>> long time, however fortunately the next generation Realtek drivers in
>> 3.20 (or 4.0) should work fine with standard hostapd in AP mode:
>>
>> http://www.spinics.net/lists/linux-wireless/msg133477.html
>>
>> Does upgrading to a recent kernel solve the problem for you?
>>
>>
>> ATB,
>>
>> Mark.
>>


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