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Aug 24 2021
7:54 AM
@zgrounds Initiate a support request with Meraki and have them disable MU-MIMO, is another option. Do so for one part of a building or a single site. It is always possible that problems may be unrelated. Fortunately we were able to replace HP G4s with new models and have not had this issue repeat.
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Apr 2 2021
10:02 AM
@Bobby89 I know of two options. Move the affected Chromebooks to 2.4GHz SSID. First try to lower the power level for 2.4GHz to a minimum. If that does not work, disable 2.4GHz for some APs. You'd have to do some surveying to figure out which ones to disable. Also, open a support ticket and ask for a temporary workaround to disable MU-MIMO.
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Feb 12 2021
11:47 AM
@Chris22 Check the log for 27.6 and see if it makes a difference in your environment. It did not work for mine. Although the problem seems to be more prevalent in dense and busy deployments, I did experience it in buildings with less than 10 Access Points. Chromebooks are in high demand right now. Phasing out these affected models will be difficult for at least another school year.
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Oct 28 2020
7:02 AM
Try pfSense with the FreeRADIUS module. It provides a nice web interface to manage mac/psk entries, plus you get the power of shell to script bulk enrollment.
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@Chris22 It is far from pretty but it works until there is a better remedy in place. Distribution of Chromebooks allowed me to connect affected devices to 2.4GHz while other devices connect to 5GHz only SSID. Metrics look good and there are 0 complaints since I made that change several weeks ago. I do have a case open and it should be a known issue as support referenced several devices with Intel adapters.
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@Chris22 Negative. Workaround is to have these devices connect to a 2.4GHz only SSID.
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So far this is what I have observed The issue persists across 26.8.1 and 27.x It is 802.11ac related because 1. Affected devices work fine with 2.4GHz only SSID, and that is a workaround until there is a better solution in place. 2. 5GHz 802.11n works as well, although not possible to configure on a Chromebook. 3. Setting MIMO SMPD to no SMPD corrects the problem on a Windows device. In this case it was a Dell 5470 with an Intel 8260 card.
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Sep 13 2020
1:56 PM
@BrothersTM Gen1 and Gen2 have different adapters and that makes it even more interesting. How dense is your deployment? How many APs on management VLAN? How many Chromebooks at affected location? Is this problem evident at more than one location? Next time it happens, could you inspect log files under chrome://device-logs. I am wondering if the authentication error appears there as well. I plan to see if the issue continues with 26.8.1. If that is the case I may have to push out an open SSID.
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Sep 13 2020
8:35 AM
@BrothersTM Have you confirmed if those are false positives or are Chromebooks actually unable to connect?
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Sep 11 2020
1:16 PM
@MerakiDave I started a case on this issue last Friday. Due to COVID it is not as easy collecting the data on site. I would have to setup a remote capture using wlanpi and then collect the data remotely. Besides HP G4, I received a report of an old Acer Chromebook exhibiting the same issue. Wireless adapter is 802.11ng based.
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Sep 11 2020
10:50 AM
Anyone out there noticed any issues with HP G4 Chromebooks and MR46 APs? We have newer Lenovos and New HP Chromebooks that do not exhibit constant connection drops. Observer behavior: Chromebook disconnects and reconnects to same AP every few seconds. Sometimes connects to adjacent AP with half the SNR. Info about devices: Chromebook G4 running CRos 85. Same issue observed with CRos 84. Wifi adapter is 7260AC AP info: MR46 1 AP per classroom. each AP set to auto channel and power. Power setting 2-6 5GHz only SSID Firmware 27.4 and 27.5 Will downgrade entire network tonight to 26.8.1 to see if that makes a difference.
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Sep 11 2020
9:41 AM
This was silently corrected in the past month. Selecting disable 802.11ax disables ax.
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Jul 2 2020
7:44 AM
1. Standard is recent and still in early implementation. 2. Outdated drivers on devices that are not managed by organization. Guests or visitors. 2. Only a few 802.11ax clients managed by organization.
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Jul 2 2020
7:29 AM
So far I managed to disable 802.11ax under radio profiles only if Band Selection is set to "Per AP". Per SSID band selection ignores "Disable 802.11ax checkmark" Is this expected behavior?
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