I am experiencing packet loss of about 12 percent with the r8712u
staging driver with my WL-352v2 device. I'm not the only one with this
problem (https://bbs.archlinux.org/viewtopic.php?id=112120). I haven't
done a git bisect yet, but I know the problem is in both the 2.6.37
version and the latest version.
Regards,
Ben
Here is the output of iwconfig:
wlan0 IEEE 802.11bg ESSID:"H23" Nickname:"rtl_wifi"
Mode:Managed Frequency:2.452 GHz Access Point: 00:23:54:A6:EF:A4
Bit Rate:54 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=100/100 Signal level=69/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
The link quality varies between 99 and 100, but is almost always 100.
The signal level varies between 62 and 69.
Ben
On 02/15/2011 06:58 AM, Ben Ruijl wrote:
> I am experiencing packet loss of about 12 percent with the r8712u
> staging driver with my WL-352v2 device. I'm not the only one with this
> problem (https://bbs.archlinux.org/viewtopic.php?id=112120). I haven't
> done a git bisect yet, but I know the problem is in both the 2.6.37
> version and the latest version.
Normally, you should not expect to get much help in this mailing list with a
driver from staging. I assume that you have seen the warning that is placed in
the dmesg output when you load a staging driver. You are fortunate in this case
as I was the one that pushed this driver into staging.
A bisection would not do much good as there have been few changes to the driver
since it was included.
Please describe your case more completely. List the output of iwconfig. I need
this info as my device gets a ping packet loss of about 1%.
Larry
On 02/15/2011 11:20 AM, Ben Ruijl wrote:
> Hi Larry,
>
> Thanks for your response. I didn't really know where to post the
> issue. I won't be able to post the output of iwconfig to you until
> Friday, since I don't have the usb stick right now. I can give you the
> output of ifconfig, though:
No, I need to know the signal strength to see if your conditions are much
different than mine.
Larry
Hi Larry,
Thanks for your response. I didn't really know where to post the
issue. I won't be able to post the output of iwconfig to you until
Friday, since I don't have the usb stick right now. I can give you the
output of ifconfig, though:
wlan0 Link encap:Ethernet HWaddr 00:0C:F6:9E:31:6B
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:f6ff:fe9e:316b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2848 errors:0 dropped:419 overruns:0 frame:0
TX packets:2597 errors:0 dropped:119 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2130344 (2.0 Mb) TX bytes:527557 (515.1 Kb)
ben@PC_ONDER ~ $ ifconfig
wlan0 Link encap:Ethernet HWaddr 00:0C:F6:9E:31:6B
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:f6ff:fe9e:316b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4415 errors:0 dropped:580 overruns:0 frame:0
TX packets:3460 errors:0 dropped:119 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4356319 (4.1 Mb) TX bytes:635028 (620.1 Kb)
ben@PC_ONDER ~ $ ifconfig
wlan0 Link encap:Ethernet HWaddr 00:0C:F6:9E:31:6B
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:f6ff:fe9e:316b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4424 errors:0 dropped:582 overruns:0 frame:0
TX packets:3468 errors:0 dropped:119 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4358105 (4.1 Mb) TX bytes:636067 (621.1 Kb)
I posted this in a topic on the arch linux forum
(https://bbs.archlinux.org/viewtopic.php?id=112120). There is also
another user with the same problems and he posted his ifconfig too.
lsusb -v recognizes the chipset as RTL8191su.
I hope this helps!
Ben
2011/2/15 Larry Finger <[email protected]>:
> On 02/15/2011 06:58 AM, Ben Ruijl wrote:
>>
>> I am experiencing packet loss of about 12 percent with the r8712u
>> staging driver with my WL-352v2 device. I'm not the only one with this
>> problem (https://bbs.archlinux.org/viewtopic.php?id=112120). I haven't
>> done a git bisect yet, but I know the problem is in both the 2.6.37
>> version and the latest version.
>
> Normally, you should not expect to get much help in this mailing list with a
> driver from staging. I assume that you have seen the warning that is placed
> in the dmesg output when you load a staging driver. You are fortunate in
> this case as I was the one that pushed this driver into staging.
>
> A bisection would not do much good as there have been few changes to the
> driver since it was included.
>
> Please describe your case more completely. List the output of iwconfig. I
> need this info as my device gets a ping packet loss of about 1%.
>
> Larry
>
--
Ben Ruijl
PGP?825472FC
Hi Larry,
The iwconfig I sent you is wrong, because I switched routers. The
router I had was a wireless N router, with which I had 12 percent
packet loss. The iwconfig you are seeing is with a wireless G
connection and now I only have 1 percent packet loss: the same as you
have. It appears that the relative packet loss is greater with an N
connection.
Ben
2011/2/18 Ben Ruijl <[email protected]>:
> Here is the output of iwconfig:
>
> wlan0 ? ? IEEE 802.11bg ?ESSID:"H23" ?Nickname:"rtl_wifi"
> ? ? ? ? ?Mode:Managed ?Frequency:2.452 GHz ?Access Point: 00:23:54:A6:EF:A4
> ? ? ? ? ?Bit Rate:54 Mb/s ? Sensitivity:0/0
> ? ? ? ? ?Retry:off ? RTS thr:off ? Fragment thr:off
> ? ? ? ? ?Power Management:off
> ? ? ? ? ?Link Quality=100/100 ?Signal level=69/100 ?Noise level=0/100
> ? ? ? ? ?Rx invalid nwid:0 ?Rx invalid crypt:0 ?Rx invalid frag:0
> ? ? ? ? ?Tx excessive retries:0 ?Invalid misc:0 ? Missed beacon:0
>
> The link quality varies between 99 and 100, but is almost always 100.
> The signal level varies between 62 and 69.
>
> Ben
>
--
Ben Ruijl
PGP?825472FC
On 03/06/2011 03:52 AM, Ben Ruijl wrote:
> Hi Larry,
>
> The iwconfig I sent you is wrong, because I switched routers. The
> router I had was a wireless N router, with which I had 12 percent
> packet loss. The iwconfig you are seeing is with a wireless G
> connection and now I only have 1 percent packet loss: the same as you
> have. It appears that the relative packet loss is greater with an N
> connection.
I have no idea why the loss should be greater with the N router than with the G
router.
How is the 2.4 GHz part of the N router configured? What make/model is it, and
what firmware is it running? Do you have the latest version?
My N router is a Netgear WNDR3300 normally running up to 270 Mbps at 5 GHz and
54 Mbps at 2.4 GHz; however, I changed it to run up to 270 Mbps in the 2.4 GHz
band. Again, I get 1% ping loss. My iwconfig output is
wlan12 IEEE 802.11bgn ESSID:"lwfdjf-n" Nickname:"rtl_wifi"
Mode:Managed Frequency:2.422 GHz Access Point: C0:3F:0E:BE:2B:44
Bit Rate:270 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=97/100 Signal level=100/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
That link gets an upload speed measured with tcpperf of more than 80 Mbps.
I do not know why your N link is so lossy. The possible reasons are outdated
firmware in the router that was established in the pre-N days, or you have
noise/interference that affects the HT setup more than a simple G configuration.
Larry