I found a weird bug haunting my TO - this first showed up with 3.11.7 (2019-10-19 somewhen in the evening CEST; afterwards I directly updated to 3.11.8 because I hoped that would stop it) and persists in 3.11.8 (happened again 2019-10-21 at around 21:00 CEST). Therefore I mention it in this thread also I already updated to 3.11.8.
installed WiFi-cards:
root@Router:~# lspci
00:01.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
00:02.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
00:03.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
02:00.0 Network controller: Qualcomm Atheros AR9580 Wireless Network Adapter (rev 01)
I use a R11e-HnD.
At a special point of time without anything obvious wrong in systemlog or kernellog WLAN is not accessible anymore - the SSIDs can still be found, but one cannot connect to them anymore (tried with Laptop, SGS7 and iPhone7).
The only option is to do a wifi down && wifi up, after which the clients can connect again.