Wireless stopped working on 9.10 (Intel WiFi Link 5100)

[munky99999]

tijl@Smaug:~$ sudo iwlist wlan0 scan
wlan0     Interface doesn't support scanning : Network is down

Also, when wireless doesn't work, the WiFi LED is switched off. That makes it seem like a hardware issue, but it does still work in Windows. The LED will just flash on during the Windows boot process. While booting Ubuntu, it remains switched off (unless the battery is fully charged and the power plug is connected as I described earlier).

sudo modprobe <modulename>

I think the module you're looking for is iwlagn.

Lets see if that works.

[Skender]

sudo modprobe <modulename>
I think the module you're looking for is iwlagn.

No, that doesn't help. The iwlagn module is already loaded.
I upgraded to 10.04 yesterday, but the problem remains.

[Tak11]

No, that doesn't help. The iwlagn module is already loaded.
I upgraded to 10.04 yesterday, but the problem remains.

I tried that as well, same issue, iwlagn is loaded, and still nothing. 10.04

[ULtimeeTje]

I had the same problem in Kubuntu 10.04

It seems to be solved since I installed the 2.6.34-rc6 (build date 30/04/2010). Packages can be found on http://kernel.ubuntu.com/~kernel-ppa....34-rc6-lucid/

More info on the KernelMainlineBuilds see: https://wiki.ubuntu.com/KernelMainlineBuilds

Note: since the kernel update KDE tells me it wants to remove the HDMI audio output... Though it seems to have detected a second HDMI audio output (it named it Intel HDMI 0). I don't have an HDMI device at the moment so I can't test wheter it still works...

[Tak11]

I had the same problem in Kubuntu 10.04

It seems to be solved since I installed the 2.6.34-rc6 (build date 30/04/2010). Packages can be found on http://kernel.ubuntu.com/~kernel-ppa....34-rc6-lucid/

More info on the KernelMainlineBuilds see: https://wiki.ubuntu.com/KernelMainlineBuilds

Note: since the kernel update KDE tells me it wants to remove the HDMI audio output... Though it seems to have detected a second HDMI audio output (it named it Intel HDMI 0). I don't have an HDMI device at the moment so I can't test wheter it still works...

I tried upgrading however the kernel broke my system =( had to boot into an older kernel and remove it with aptitude

[Tak11]

Edit:Bug fix

Wrote a script to solve this problem.
available at: http://pastebin.com/raxb300P

#!/bin/bash
#repair interwebs.
#by: tak 6/2/2010

#Repairs occasional networking bug in kubuntu.

ROOT_UID=0  

echo "Checking for root..."

if [ "$UID" -eq "$ROOT_UID" ]  
then
  echo "You are root. moving on"
else
  echo "Run as root."
  exit 1
fi

if [ -n `cat /etc/NetworkManager/nm-system-settings.conf | grep false` ]
then
  echo "Problem found.."
  sed 's/false/true/g' /etc/NetworkManager/nm-system-settings.conf > /etc/NetworkManager/nm-system-settings.temp
  rm /etc/NetworkManager/nm-system-settings.conf
  mv /etc/NetworkManager/nm-system-settings.temp /etc/NetworkManager/nm-system-settings.conf
  echo "Problem repaired."
fi

if [ -z `cat /etc/NetworkManager/nm-system-settings.conf | grep ifupdown,keyfile` ]
then
  echo "Problem found.."
  sed 's/plugins=.*$/plugins=ifupdown,keyfile/g' /etc/NetworkManager/nm-system-settings.conf > /etc/NetworkManager/nm-system-settings.temp
  rm /etc/NetworkManager/nm-system-settings.conf
  mv /etc/NetworkManager/nm-system-settings.temp /etc/NetworkManager/nm-system-settings.conf
  echo "Problem repaired."
fi

if [ -n `cat /var/lib/NetworkManager/NetworkManager.state | grep false` ]
then
  echo "Problem found.."
  sed 's/false/true/g' /var/lib/NetworkManager/NetworkManager.state > /var/lib/NetworkManager/NetworkManager.temp
  rm /var/lib/NetworkManager/NetworkManager.state
  mv /var/lib/NetworkManager/NetworkManager.temp /var/lib/NetworkManager/NetworkManager.state
  echo "Problem repaired."
fi

exit 0