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[Bug 802902] Re: Realtek rtl8187b wireless chipset slow speed


Thanks Mike for quick answer. It is nice to find out that there is some
body alive in this bug :D

It was only in this example with that 
new  kernel (3.11.0-2-lowlatency #1-Ubuntu SMP PREEMPT Fri Aug 16 22:06:58 UTC 2013 i686) 
when  Netgear usb adapter give 100% lost,
with older kernel (3.8.0-30-lowlatency #22-Ubuntu SMP PREEMPT Mon Aug 26 22:31:40 UTC 2013 x86_64 x86_64 x86_64) adapter was working, but so so slugish like hell.... and average pakage lost was up til 50% or
60%, and sometimes up til 20%.
The router was just in average  10 m distance with the wooden wall.  So it is nothing to do with signal strenght
because another adapter with intel chip with all most the same signal quality gives 0% of pakage lost when pinging to router.
And a bit rate, i think, i set it it to auto  or something, but if i want i can set it up til to 54mb/s
with sudo iwconfig wlan1 rate 54M fixed but there is no point set rate to 54mb/s with internet speed i have .  It is the same like when your car 
can go on road max 200km/h and put 400km/h on speedometer. the car will not became faster just for that ;)

And on athe laptop with 13.04 ubuntustudio with 
kernel (3.8.0-30-lowlatency #22-Ubuntu SMP PREEMPT Mon Aug 26 22:31:40 UTC 2013 x86_64 x86_64 x86_64)
with setings
sudo iwconfig wlan1 rate 5.5M fixed 
sudo iwconfig wlan1 frag 2346
and laptop about 15m distance from router

pinging to router gives
PING ( 56(84) bytes of data.
64 bytes from icmp_req=9 ttl=64 time=1.67 ms
64 bytes from icmp_req=10 ttl=64 time=3.45 ms
64 bytes from icmp_req=12 ttl=64 time=2.04 ms
64 bytes from icmp_req=13 ttl=64 time=2.60 ms
--- ping statistics ---
15 packets transmitted, 4 received, 73% packet loss, time 14005ms
rtt min/avg/max/mdev = 1.677/2.445/3.452/0.671 ms

and with sudo iwconfig wlan1 txpower 15

PING ( 56(84) bytes of data.
64 bytes from icmp_req=4 ttl=64 time=1.71 ms
64 bytes from icmp_req=6 ttl=64 time=1.45 ms
64 bytes from icmp_req=7 ttl=64 time=3.05 ms
64 bytes from icmp_req=8 ttl=64 time=1.58 ms
64 bytes from icmp_req=9 ttl=64 time=1.75 ms
64 bytes from icmp_req=10 ttl=64 time=1.27 ms
--- ping statistics ---
10 packets transmitted, 6 received, 40% packet loss, time 9008ms
rtt min/avg/max/mdev = 1.273/1.805/3.054/0.582 ms

So i think it is the same or allmost the same like yours situation,
because with this % of packet lost i also shall get slow download speed.

Actualy adapter in 2012 up till august was working fine. Then router was changed
and i began to have connection problems with this adpter. I don't remember what kernel was at that momem in use.
Now i began to remember that maybe i made experiment with another router dlink some have year ago,
and adapter was pinging fine, but now can not verify it 100% if I remember it 100% exactly.

Mike what is router name that your adapter is connecting ?

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  Realtek rtl8187b wireless chipset slow speed

Status in The Linux Kernel:
Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  Hi, I have ubuntu 11.04, all updates, wifi chipset rtl8187B, kernel 2.6.38-10, and 14mbit/s internet connection. 
  When I try to download something, for example from torrents, I see ping up (up to 500-800ms), slow speed (<1mbit/s) and packets lost.
  In windows its works fine, ping didnt up, download speed 14mbit/s. 
  So if I want to download something, I need to reboot from ubuntu to windows, or wait for download at low speed in ubuntu. And it's not good=(
  Thanks, and sorry my bad english.

  laptop:~$ uname -a
  Linux mike-laptop 2.6.38-10-generic #44-Ubuntu SMP Thu Jun 2 21:32:22 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

  laptop:~$ modprobe --show-depends rtl8187
  insmod /lib/modules/2.6.38-10-generic/updates/drivers/misc/eeprom/eeprom_93cx6.ko
  insmod /lib/modules/2.6.38-10-generic/updates/net/wireless/cfg80211.ko
  insmod /lib/modules/2.6.38-10-generic/updates/net/mac80211/mac80211.ko
  insmod /lib/modules/2.6.38-10-generic/updates/drivers/net/wireless/rtl818x/rtl8187/rtl8187.ko

  laptop:~$ sudo lsusb -d 0bda:8187
  Bus 001 Device 004: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: linux-image-2.6.38-10-generic 2.6.38-10.44
  ProcVersionSignature: Ubuntu 2.6.38-10.44-generic
  Uname: Linux 2.6.38-10-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   /dev/snd/controlC0:  mike       2412 F.... pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xfcb00000 irq 43'
     Mixer name	: 'Realtek ALC269'
     Components	: 'HDA:10ec0269,144dc06a,00100004'
     Controls      : 13
     Simple ctrls  : 8
   Card hw:1 'NVidia'/'HDA NVidia at 0xddefc000 irq 16'
     Mixer name	: 'Nvidia GPU 0b HDMI/DP'
     Components	: 'HDA:10de000b,10de0101,00100100'
     Controls      : 16
     Simple ctrls  : 4
  Date: Tue Jun 28 13:24:48 2011
  HibernationDevice: RESUME=UUID=339679fe-6015-48a0-b9f5-9bdecde05562
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110405)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. R530/R730/P530
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic root=UUID=eae27d1a-6cca-45bb-8c38-d8cdd238b079 ro quiet splash nomodeset video=uvesafb:mode_option=1377x768-24,mtrr=3,scroll=ywrap vt.handoff=7
   linux-restricted-modules-2.6.38-10-generic N/A
   linux-backports-modules-2.6.38-10-generic  N/A
   linux-firmware                             1.52.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to natty on 2011-05-04 (54 days ago)
  dmi.bios.date: 06/21/2010
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 04KQ.M007.20100621.KSJ
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: R530/R730/P530
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr04KQ.M007.20100621.KSJ:bd06/21/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR530/R730/P530:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR530/R730/P530:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: R530/R730/P530
  dmi.product.version: Not Applicable
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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