On Ubuntu 14.04 32bit, after some up-time my wireless card stops working. Sometimes it helps to stop WiFi in the nm-applett (at the top right corner) and restart it to get a new connection to my WiFi, but mostly this doesn't help anymore - you have to reboot to use the card again.
I had this at several different locations so it was definitely a problem with my card.
The kernel at the moment:
$ uname -rp
3.14.1-031401-generic i686
My guess is that the wireless power save option that is set by powertop
might cause some problems, so I added this to my /etc/rc.local
so the end part looked like this:
# By default this script does nothing.
#####################################################
# tune all power save settings to >good<
powertop --auto-tune
once I disabled that option again, the wireless card seems to work better, but not all the time.
When in the crashed state and if I try to re-enable WiFi in the nm-applet I get this error in /var/log/syslog
:
iwlwifi 0000:01:00.0: Failed to load firmware chunk!
I collected some data with the help of this answer:
##### lspci ##### 01:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 6b) Subsystem: Intel Corporation Wireless-N 7260 [8086:c262] Kernel driver in use: iwlwifi
If I look for locate 7260|grep -i wifi
, I find the same module /lib/firmware/iwlwifi-7260-8.ucode
. It doesn't use the latest drivers from wireless.kernel.org because the iwlwifi-7260-9.ucode is not supported yet.)
How can I fix this problem on my Lenovo Yoga 2 Pro? Maybe it is possible to reload the kernel module somehow to re-enable it with a script if it died?