From: Jes Sorensen <jes.sorensen@gmail.com>
To: Nikolay Borisov <n.borisov.lkml@gmail.com>,
linux-wireless@vger.kernel.org
Subject: Re: Slow connection with rtl8xxxu and 8192eu chipset
Date: Tue, 28 Nov 2017 11:59:07 -0500 [thread overview]
Message-ID: <e4cd40ab-8663-e329-952f-0eb7c27cf565@gmail.com> (raw)
In-Reply-To: <12fed6ac-0e21-a137-4d7c-3bb341c4e831@gmail.com>
On 11/28/2017 11:49 AM, Nikolay Borisov wrote:
>
>
> On 28.11.2017 18:35, Jes Sorensen wrote:
>> On 11/28/2017 11:26 AM, Nikolay Borisov wrote:
>>>
>>>
>>> On 28.11.2017 18:16, Jes Sorensen wrote:
>>>> On 11/14/2017 05:39 AM, Nikolay Borisov wrote:
>>>>>
>>>>>
>>>>> I just tested with verbatim 4.14 and even though the wireless works,
>>>>> iwconfig reports something strange:
>>>>>
>>>>> iwconfig wifi1
>>>>> wifi1 no wireless extensions.
>>>>>
>>>>> However, my device works as expected (albeit still slow):
>>>>>
>>>>> wifi1 Link encap:Ethernet HWaddr 18:d6:c7:0d:47:3c
>>>>> inet addr:10.20.1.175 Bcast:10.20.1.255 Mask:255.255.255.0
>>>>> inet6 addr: fe80::281d:5f27:eb1b:8ded/64 Scope:Link
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> RX packets:38903 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:24689 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:51524413 (51.5 MB) TX bytes:5503039 (5.5 MB)
>>>>
>>>> iwconfig has been deprecated for a decade, but maybe you could elaborate
>>>> on what you feel is strange in this output?
>>>
>>> Well there are 2 things:
>>>
>>> 1. The low bitrate - which I've confirmed doing actual data test, ie,
>>> not just the number but the fact that the speeds are low.
>>>
>>> 2. The worse signal level/link quality.
>>
>> I don't see either of those in the iwconfig output
>>
>> The low TX bitrate is a known issue. Somehow the firmware rate handling
>> doesn't seem to work (or it works differently than I assumed) similar to
>> for the 8188eu. It's something I need to figure out when I have some time.
>>
>> As for link quality is this something you measured or read out of 'iw' ?
>
> Well there is:
>
> Link Quality=26/70 Signal level=-84 dBm < - with rtl8xxxu driver
>
> Link Quality=81/100 Signal level=100/100 Noise level=0/100 <-- with
> vendor's driver. Another vector was the icon of network manager had only
> 2 bars with the in-tree driver and had full bars with out (yeah, this is
> a bit subjective metric but it's the best i've got).
OK, the link reporting from rtl8xxxu isn't complete, so I wouldn't put
too much into this.
Cheers,
Jes
next prev parent reply other threads:[~2017-11-28 16:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-14 9:26 Slow connection with rtl8xxxu and 8192eu chipset Nikolay Borisov
2017-11-14 10:39 ` Nikolay Borisov
2017-11-28 16:16 ` Jes Sorensen
2017-11-28 16:26 ` Nikolay Borisov
2017-11-28 16:35 ` Jes Sorensen
2017-11-28 16:49 ` Nikolay Borisov
2017-11-28 16:59 ` Jes Sorensen [this message]
2017-11-14 12:42 ` Kalle Valo
2017-11-14 12:50 ` Nikolay Borisov
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