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Bug#884426: marked as done (Wifi speeds of Debian 9 (Stretch) are 2-3 times slower than Debian 8 (Jessie))

Your message dated Sat, 15 May 2021 12:30:39 -0700 (PDT)
with message-id <60a0215f.1c69fb81.f228.d080@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #884426,
regarding Wifi speeds of Debian 9 (Stretch) are 2-3 times slower than Debian 8 (Jessie)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
884426: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884426
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: firmware-iwlwifi
Version: 20161130-3 

REPORT: Debian 8 (Jessie)
1) The Jessie wifi package is 'firmware-iwlwifi' version 0.43

2) Linux kernel = 3.16.0.4-amd64 #1 SMP Debian 3.16.51-2 (2017-12-03)
x86_64 GNU/Linux

3) C library version = 2.19-18+deb8u10

When using Debian 8 (Jessie) fresh after GNOME install, wifi speeds are
measured at 150Mbps download on N network using the Intel Centrino
Ultimate-N 6300 wireless card (on a ThinkPad X220 with 3 antennas). 
After setting the '11n_disable=8' parameter (as exampled immediately
below), speeds increased to 200Mbps download.

$ sudo nano /etc/modprobe.d/iwlwifi.conf
options iwlwifi 11n_disable=8


REPORT: Debian 9 (Stretch)
1) The Stretch wifi package is 'firmware-iwlwifi' version 20161130-3

2) Linux kernel = 4.9.0-4-amd64 #1 SMP Debian 4.9.65-3 (2017-12-03)
x86_64 GNU/Linux

3) C library version = 2.24-11+deb9u1

When using Debian 9 (Stretch) fresh after GNOME install, wifi speeds are
measured at around 50 Mbps download on N network using the Intel
Centrino Ultimate-N 6300 wireless card (on a ThinkPad X220 with 3
antennas). After setting the '11n_disable=8' parameter (as exampled
immediately below), speeds increased to around 100Mbps download.

$ sudo nano /etc/modprobe.d/iwlwifi.conf
options iwlwifi 11n_disable=8


The system used for testing was a Lenovo ThinkPad X220. Stretch and
Jessie were both run on identical hardware connecting to the same access
point produced by a router running LEDE. Debian Stretch wifi is
significantly slower than Debian Jessie wifi. Hopefully something can be
done to improve the wifi speed of Debian Stretch but also to make sure
that the wifi speeds of Debian Buster can be improved before it is
released as stable.

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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