Comment 5 for bug 1434525

Since I upgraded to 15.04 on my laptop, it will periodically lose connection to wifi. syslog fills up with:

May 2 08:32:46 sif NetworkManager[833]: <error> [1430569966.006933] [rdisc/nm-l
ndp-rdisc.c:241] send_rs(): (wlan0): cannot send router solicitation: -101.

When it last happened, I noticed that at one point there was a different message and after that the code after "router solicitation" changed:

May 2 09:32:44 sif NetworkManager[833]: (devices/nm-device.c:4675):nm_device_ac
tivate_ip6_config_commit: runtime check failed: (nm_platform_link_is_up (nm_devi
ce_get_ip_ifindex (self)))
May 2 09:32:46 sif NetworkManager[833]: <error> [1430573566.684329] [rdisc/nm-l
ndp-rdisc.c:241] send_rs(): (wlan0): cannot send router solicitation: -99.

I haven't found any way to fix the problem short of rebooting. When I tried restarting network manager manually using systemd, I started getting kernel errors, which may well not be related. I don't know enough to diagnose the problem myself, so if there's any other information that would be useful, I can provide it.