On 08/30/18 at 08:55am, Luca Coelho wrote: > On Thu, 2018-08-30 at 13:06 +0800, Dave Young wrote: > > On 08/30/18 at 07:15am, Luca Coelho wrote: > > > On Wed, 2018-08-29 at 14:54 +0800, Dave Young wrote: > > > > [ 74.123114] wlp61s0: authenticate with 00:1f:c6:82:0a:57 > > > > [ 74.126099] wlp61s0: send auth to 00:1f:c6:82:0a:57 (try 1/3) > > > > [ 74.139740] wlp61s0: authenticated > > > > [ 74.140142] iwlwifi 0000:3d:00.0 wlp61s0: disabling HE/HT/VHT due to WEP/TKIP use > > > > [ 74.140146] iwlwifi 0000:3d:00.0 wlp61s0: disabling HT as WMM/QoS is not supported by the AP > > > > [ 74.140149] iwlwifi 0000:3d:00.0 wlp61s0: disabling VHT as WMM/QoS is not supported by the AP > > > > > > Your AP seems to be configured to use WEP or TKIP, which is not allowed > > > by IEEE802.11n, so we disable all the higher rates, as you can see > > > here. It should still work, but you will only get very basic rates > > > (i.e. slow). > > > > Luka, thanks for the suggestion, moved AP to use WPA2-personal + AES. > > seems I got only two features disabled this time: > > [ 20.949347] iwlwifi 0000:3d:00.0 wlp61s0: disabling HT as WMM/QoS is not supported by the AP > > [ 20.949351] iwlwifi 0000:3d:00.0 wlp61s0: disabling VHT as WMM/QoS is not supported by the AP > > [ 20.949622] wlp61s0: associate with 00:1f:c6:82:0a:57 (try 1/3) > > There are many interoperability problems with old 11n APs that either > support a draft version of the specs or simply have bugs in their > implementations of the 11n specs. When we detect these problems, we > disable 11n rates, so connectivity will be slower, but it will at least > remain connected. This seems to be the case with your AP. :( This seems not cause much slower connection. But WMM indeed cause a very slow connection, thus I just leave WMM disabled as before. > > > > > > [ 2521.068469] wlp61s0: deauthenticating from 00:1f:c6:82:0a:57 by local choice (Reason: 3=DEAUTH_LEAVING) > > > > > > Other than that I can't really see what is going on, except that > > > something is deciding to disconnect here... > > > > > > So, first thing I'd suggest would be to try to reconfigure your AP to > > > use something else than WEP or TKIP, just to see if it improves in any > > > way. > > > > Will observe if it works or not. BTW, my old laptop Thinkpad T440s works > > well with the same AP. > > I hope it improves. If not, we should debug it further. It's a good > thing not to use WEP and TKIP anyway, because they're not very secure > anyway. Ok, will provide feedback later, thanks! > > > > > And BTW, is this a regression in recent kernels or has this always > > > happened to you with this laptop/AP combination? > > > > From my observation it just always happen, but hmm not 100% sure.. > > Okay, so we don't have enough information on this. It doesn't matter. > What is the NIC on your old T440s? It is Intel wireless 7260, but since the laptop is not at hand I can not get lspci details. > > -- > Cheers, > Luca. > Thanks Dave
