Recently Upgraded network to AC. Using 3825 and 3935 APs on a 10.31.03.0012 v2110 controller, NAC based portal, bridge at AP topology. Wired transport on Extreme/Enterasys switches. We are finding that
any Lenovo N22 chromebook running ChromeOS 59 or higher will experience kernel panic reboots when in vicinity of specific locations in the building. I have multi-edited all of the APs in the related regions of the building and made certain that they all are configured identically.
We have been reformatting the chromebooks (2000 of them) to ChromeOS to mitigate the problem. Obviously there is a bug in CrOS v59 and v60 causing this, but I can't explain why there are locations in the building we can go to and repeatably reproduce the problem. I kid you not, walk down the hallway holding a Chromebook, and as soon as you enter Mrs. Jones's classroom your Chromebook is going to crash, and keep on crash-looping on reboot until you walk away. Needless to say, Mrs. Jones is getting pretty frustrated!
As an aside, the Wifi nic in these is a Intel 7265. CrOS 58 released in early summer. Soon after CrOS 58 Intel released a nic update (19.60) that addressed a bug related to loss of network when roaming. If CrOS builds with the Intel driver 58 and 59 would likely have this code.
There is light at the end of the tunnel, in that the beta channel v61 CrOS appears to be more stable. But
who wants to migrate 2000 chromebooks to a beta channel? Me neither.
I have a bug report opened with Google (
https://bugs.chromium.org/p/chromium/issues/detail?id=765424). My best guess is that the crashes happen in locations where roaming would be more likely, but that is a *guess*. Anyone have any suggestions for what to look for on the wifi side that can cause location based OS crashes?
