I have just upgraded from 12.04 to 14.04. The upgrade process went off smoothly, only asked if I wanted to keep some old configs (which I did) and I restarted the computer when finished.
The computer is a HP Envy M6 (less than a year old) originally with Windows 8 which I completely nuked in favor of Ubuntu about five months ago. This install has worked almost flawlessly since it was done. There was a minor problem early on with something I can't remember now as it was resolved in an update.
However, after this update to 14.04.1 I do not now have any wireless connectivity. This is what I have tried so far.
- Restart the computer. No effect.
- I tried the pressing the wireless function key, also no effect either way. The light didn't even go out.
- I also tried disabling and reenabling networking from the menu at the top of the screen. The same, no effect.
- After googling I have tried lshw, this provided the clue:
Under *-pci:2 with the description: PCI bridge
*-network DISABLED
description: Wireless interface
product: RT3290 Wireless 802.11n 1T/1R PCIe
...
bus info: pci@oooo:08:00.0
...
configuration: broadcast=yes driver=rt2800pci driverversion=3.13.0-34-generic firmware=0.37 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:c1510000-c151ffff
...
Please note, since there is no network on the laptop, I have typed this out by hand. I have tried to include what I think might be relevant, if you need more detail please ask.
Further to this and after some googling I attempted to:
sudo iwlist wlan0 scanning (which resulted in)
wlan0 Interface doesn't support scanning : Network is down
and
sudo ifconfig wlan0 up (which resulted in)
SIOCSIFFLAGS: Input/Output Error
Most of the relevant information I've found seems to revolve around lshw and ifconfig (which fails badly for me.) Can anyone help me work out what to do here?
Thanks.
Update
Okay. Some new info.
Last night when I left, I suspended the laptop (as I usually do) rather than shutting down. When I came in and woke the computer this morning, the wireless was back up and working.
I have not tried restarting yet, I have a lot of work to do and don't want to spend time messing around with it quite yet.