Public bug reported:
Have used ubuntu from 10.0.x right through 11.0.x with no problems.
Always had 30-50 Mbps download speeds. Have a 75 MB connection.
After the upgrade the wifi no longer works adequately and download
speeds are around 4.5 Mbps (normal would be 50-60).
Additionally, after startup the mouse pointer drags like its stuck in
molasses for about 3 to 4 minutes and makes the laptop unusuable.
Eventually recovers and I can used the mouse again. Affects pointer
pad, red tracking button and external mouse.
System info
bob@bob-ThinkPad-T400:~$ lspci -nnk | grep -iA2 net
00:19.0 Ethernet controller [0200]: Intel Corporation 82567LM Gigabit Network
Connection [8086:10f5] (rev 03)
Subsystem: Lenovo Device [17aa:20ee]
Kernel driver in use: e1000e
--
03:00.0 Network controller [0280]: Intel Corporation Ultimate N WiFi Link 5300
[8086:4236]
Subsystem: Intel Corporation Device [8086:1011]
Kernel driver in use: iwlwifi
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Tried all the workarounds I could find on the internet but no luck thus
far.
Would have to revert to older unsupported versions if we can't find a
workaround for this.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: 12.04 after connection lenovo slower speed t400 upgrade wifi
** Attachment added: "FixWifi.txt"
https://bugs.launchpad.net/bugs/1109347/+attachment/3506657/+files/FixWifi.txt
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https://bugs.launchpad.net/bugs/1109347
Title:
Lenovo T400 wifi connection speed extremely bad with 12.04
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