Source: broadcom-sta
Severity: important
Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
Standard ubuntu (now 15.10, kernel 4.2.0.22) install on Lenovo
yoga pro 3.
(First time using reportbug, so I'll add more text here. Sorry
if that's wrong.)
The issue is that WiFi connects fine, and is usable for web and
mail but intolerable for e.g. ssh sessions. The only "symptom"
I'm seeing is that ifconfig reports many frame errors, sometimes
about 10% of the #packets rx'd, sometimes 200% of that. A typical
ssh session (even to machines local on my LAN) stalls within a
few seconds/minutes and repeatedly does that. It is just possible
to login and run an update/reboot, but doing more in an ssh
session isn't feasible. Netstat shows bytes queued up (on the
lenovo yoga machine) when this is happening.
I am seeing very poor link quality (currently 38/70) and
signal level (-72 dBm) as reported by iwconfig even
though I'm only ~10m from the access point and no other
device has any similarly bad signal.
All wired connections are fine. No other device on my n/w has
this issue.
* What exactly did you do (or not do) that was effective (or
ineffective)?
WiFi with the wl.ko driver always has this problem on my LAN.
I have seen similar issues on other WiFi networks, but in my
LAN the signal is probably weaker than in my office environment.
Building and installing the more recent code from broadcom
didn't help. (Sometimes slightly better, sometimes worse,
never perfect.) I tried but failed to find a way to use
ndiswrapper but maybe that's outmoded these days. I did not
try other linux drivers as the documentation always said
that they did not support the bcm4352.
I suspect this is related to Bob Briscoe's theory [1] that
the driver or chipset is trying for too high a speed even if
the quality of the connection is not sufficiently good.
(Note though that the bug is not the same - I do get
connection, just v. poor quality.)
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=786699#10
* What was the outcome of this action?
No improvement.
* What outcome did you expect instead?
Improvement:-)
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-- System Information:
Debian Release: jessie/sid
APT prefers wily-updates
APT policy: (500, 'wily-updates'), (500, 'wily-security'), (500, 'wily'),
(100, 'wily-backports')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.2.0-22-generic (SMP w/4 CPU cores)
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
