[lkml]   [2012]   [Dec]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: dire state of rtl8192se driver in 3.7
On 12/22/2012 04:55 PM, Norbert Preining wrote:
> Hi Larry,, hi all
> On Sa, 22 Dez 2012, Larry Finger wrote:
>> It is not that no one cares; however, your attitude does nothing to
>> induce me to work on this problem. The facts are not needed "to make
> Aehm, ... after my initial report you asked me several more questions,
> which I answered within a few hours. After that no as in 0 response,
> although I pinged back a few times.
> So am I supposed to deduce from 0 reactions that anyone is interested?
>> people happy", they are necessary to try to reproduce the problem. If I
>> cannot make it happen here, then I cannot fix it. Also, remember that I
> Disagree. I am involved in tracking down a nasty regression in the intel
> drm driver, which the intel people can *not* reproduce, but several
> other people, and after long trials and patches and converse it is
> starting to look much better.
>> am a volunteer. I get nothing from Realtek but starting code of varying
>> quality and some sample chips. At least my versions do not crash your
> Ok, that is a problem I understand. If this is the case, that it is
> a single volunteer caring for the code, then I see a real problem.
> (And I also will try to stay away from rtl wlan cards on my next laptop)
>> I have never tested forcing a reset on the chip the way you did. I am not
>> surprised that bad things happen.
> But the DMAR item I also reported points to a real problem I guess.

Yes, I would agree.

>> From some of the material that you report, it appears that you have an
>> 802.11n connection using WPA1 encryption. (More of those pesky details!)
> WPA PSK, yes. I don't know the difference between WPA2 and WPA, though.

WPA2 is AES and WPA(1) is TKIP.

My device is the same as yours. The command 'lspci -nn' shows:

0e:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8191SEvB
Wireless LAN Controller [10ec:8172] (rev 10)

The B variety is a 1x2 configuration.

My signal strength is essentially the same as yours.

wlan0 IEEE 802.11bgn ESSID:"lwfdjf-n"
Mode:Managed Frequency:2.422 GHz Access Point: C0:3F:0E:BE:2B:44
Bit Rate=18 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-35 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:1943 Missed beacon:0

A throughput test with netperf shows the following for 3 second samples:

TCP_MAERTS Test: 23.73 20.80 20.87 20.62 20.50 20.62 20.19 20.67 20.70 20.75
RX Results: max 23.73, min 20.19. Mean 20.95(0.95)

TCP_STREAM Test: 20.82 26.36 25.77 25.89 26.36 26.31 26.19 26.50 26.16 25.93
TX Results: max 26.50, min 20.82. Mean 25.63(1.62)

My router does not let me change the TKIP interval, which I think means 3600
seconds. Running a ping for ~4000 seconds results in

--- ping statistics ---
4004 packets transmitted, 4002 received, 0% packet loss, time 4007793ms
rtt min/avg/max/mdev = 0.782/1.605/77.929/4.310 ms

Only 2 packets lost in 4000 is pretty good, and my longest return time of 77 ms
is certainly not like you get.

My router is a Netgear WNDR3300 running firmware version V1.0.45_1.0.45NA.

These results are representative of what I have always gotten. I have no idea
why your system is so different.

One thing to try is loading the module with option "ips=0".


 \ /
  Last update: 2012-12-23 03:21    [W:0.066 / U:0.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site