Very often, in Ubuntu 17.04 I have problems connecting to an SSID if I am already on another one. I work as a network technician, so this is extremely annoying when I need to test different (B)SSID's. I just changed from Windows 10 to Linux, and Windows was able to change SSID properly all the time.
Ubuntu "17.04 (Zesty Zapus)"
03:00.0 Network controller: Intel Corporation Wireless 7265 (rev 48)
Linux olof-gnome 4.10.0-21-generic #23-Ubuntu SMP Fri Apr 28 16:14:22 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Laptop: HP ZBook Gen2 14"
The workaround is usually to hit the Wifi button on my Laptop to disable Wireless and then enable again. But if my computer connects to the wrong network and I have to change SSID again, I have to redo the process some times. Only half of the times I am able to change SSID properly on first try. I also don't know how Ubuntu makes descisions to connect to wifi, I see no prio-list. Is it only based on signal strenght?
Here are the dmesg logs.
olof@ubuntu:-$ dmesg -wH
[juni 6 11:10] wlo1: disconnect from AP 4c:32:75:c6:23:90 for new auth to 4c:32:75:c6:23:91
[ +0,012838] wlo1: authenticate with 4c:32:75:c6:23:91
[ +0,005802] wlo1: send auth to 4c:32:75:c6:23:91 (try 1/3)
[ +0,003610] wlo1: authenticated
[ +0,001144] wlo1: associate with 4c:32:75:c6:23:91 (try 1/3)
[ +0,001157] wlo1: RX AssocResp from 4c:32:75:c6:23:91 (capab=0x1011 status=0 aid=2)
[ +0,001117] wlo1: associated
[ +0,070063] wlo1: Limiting TX power to 23 (23 - 0) dBm as advertised by 4c:32:75:c6:23:91
[juni 6 11:15] wlo1: disconnect from AP 4c:32:75:c6:23:91 for new auth to 4c:32:75:c6:23:90
[ +0,005169] wlo1: authenticate with 4c:32:75:c6:23:90
[ +0,005331] wlo1: send auth to 4c:32:75:c6:23:90 (try 1/3)
[ +0,003543] wlo1: authenticated
[ +0,001371] wlo1: associate with 4c:32:75:c6:23:90 (try 1/3)
[ +0,003830] wlo1: RX AssocResp from 4c:32:75:c6:23:90 (capab=0x1411 status=0 aid=2)
[ +0,000876] wlo1: associated
[ +0,063580] wlo1: Limiting TX power to 20 (20 - 0) dBm as advertised by 4c:32:75:c6:23:90
[juni 6 11:16] perf: interrupt took too long (3136 > 3133), lowering kernel.perf_event_max_sample_rate to 63750
[juni 6 11:17] wlo1: disconnect from AP 4c:32:75:c6:23:90 for new auth to 4c:32:75:c6:23:91
[ +0,005739] wlo1: authenticate with 4c:32:75:c6:23:91
[ +0,005409] wlo1: send auth to 4c:32:75:c6:23:91 (try 1/3)
[ +0,002170] wlo1: authenticated
[ +0,003044] wlo1: associate with 4c:32:75:c6:23:91 (try 1/3)
[ +0,001291] wlo1: RX AssocResp from 4c:32:75:c6:23:91 (capab=0x1011 status=0 aid=1)
[ +0,001291] wlo1: associated
[ +0,075185] wlo1: Limiting TX power to 23 (23 - 0) dBm as advertised by 4c:32:75:c6:23:91
[juni 6 11:24] wlo1: deauthenticating from 4c:32:75:c6:23:91 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +0,022826] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,020912] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +2,580213] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,005804] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,003158] wlo1: authenticated
[ +0,610944] iwlwifi 0000:03:00.0: No association and the time event is over already...
[ +0,000097] wlo1: Connection to AP 02:1a:11:f0:b4:f5 lost
[ +4,390644] wlo1: aborting authentication with 02:1a:11:f0:b4:f5 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +1,251272] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,005471] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,002829] wlo1: authenticated
[ +0,612619] iwlwifi 0000:03:00.0: No association and the time event is over already...
[ +0,000039] wlo1: Connection to AP 02:1a:11:f0:b4:f5 lost
[ +4,387929] wlo1: aborting authentication with 02:1a:11:f0:b4:f5 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +1,549483] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,004373] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,013443] wlo1: authenticated
[ +7,037354] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,004912] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,004817] wlo1: authenticated
[ +0,609739] iwlwifi 0000:03:00.0: No association and the time event is over already...
Failed to connect multiple times
[ +0,000020] wlo1: Connection to AP 02:1a:11:f0:b4:f5 lost
[ +1,999788] wlo1: aborting authentication with 02:1a:11:f0:b4:f5 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +0,009319] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,004632] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,026438] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,043695] wlo1: authenticate with 4c:32:75:c6:23:91
[ +0,005212] wlo1: send auth to 4c:32:75:c6:23:91 (try 1/3)
[ +0,001898] wlo1: authenticated
[ +0,002338] wlo1: associate with 4c:32:75:c6:23:91 (try 1/3)
[ +0,001300] wlo1: RX AssocResp from 4c:32:75:c6:23:91 (capab=0x1011 status=0 aid=1)
[ +0,001599] wlo1: associated
[ +0,000051] IPv6: ADDRCONF(NETDEV_CHANGE): wlo1: link becomes ready
[ +0,056792] wlo1: Limiting TX power to 23 (23 - 0) dBm as advertised by 4c:32:75:c6:23:91
[ +10,165995] systemd[1]: snapd.refresh.timer: Adding 5h 41min 44.060361s random time.
[ +0,000015] systemd[1]: apt-daily.timer: Adding 11h 35min 14.616314s random time.
[ +0,000861] systemd[1]: lvm2-lvmetad.socket: Cannot add dependency job, ignoring: Unit lvm2-lvmetad.socket is masked.
[ +5,368869] wlo1: deauthenticating from 4c:32:75:c6:23:91 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +0,021851] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,011347] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,111984] systemd[1]: snapd.refresh.timer: Adding 2h 14min 36.770703s random time.
[ +0,000014] systemd[1]: apt-daily.timer: Adding 1h 1min 38.919788s random time.
[ +0,000748] systemd[1]: lvm2-lvmpolld.socket: Cannot add dependency job, ignoring: Unit lvm2-lvmpolld.socket is masked.
[ +2,386814] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,006726] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,007965] wlo1: authenticated
[ +0,606357] iwlwifi 0000:03:00.0: No association and the time event is over already...
[ +0,000040] wlo1: Connection to AP 02:1a:11:f0:b4:f5 lost
Failed to connect, so I pressed the wifi button
[ +2,466657] atkbd serio0: Unknown key pressed (translated set 2, code 0xf8 on isa0060/serio0).
[ +0,000007] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.
[ +0,163390] atkbd serio0: Unknown key released (translated set 2, code 0xf8 on isa0060/serio0).
[ +0,000003] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.
[ +2,573230] atkbd serio0: Unknown key pressed (translated set 2, code 0xf8 on isa0060/serio0).
[ +0,000006] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.
[ +0,006888] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ +0,000454] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ +0,064429] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ +0,000563] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ +0,024052] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,045865] atkbd serio0: Unknown key released (translated set 2, code 0xf8 on isa0060/serio0).
[ +0,000003] atkbd serio0: Use 'setkeycodes e078 <keycode>' to make it known.
Enabled wifi again
[ +0,022201] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[juni 6 11:25] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,057617] wlo1: authenticate with 4c:32:75:c6:23:91
[ +0,004662] wlo1: send auth to 4c:32:75:c6:23:91 (try 1/3)
[ +0,001422] wlo1: authenticated
[ +0,000232] wlo1: associate with 4c:32:75:c6:23:91 (try 1/3)
[ +0,001668] wlo1: RX AssocResp from 4c:32:75:c6:23:91 (capab=0x1011 status=0 aid=1)
[ +0,001292] wlo1: associated
[ +0,000093] IPv6: ADDRCONF(NETDEV_CHANGE): wlo1: link becomes ready
[ +0,090950] wlo1: Limiting TX power to 23 (23 - 0) dBm as advertised by 4c:32:75:c6:23:91
[ +3,448890] wlo1: deauthenticating from 4c:32:75:c6:23:91 by local choice (Reason: 3=DEAUTH_LEAVING)
[ +0,016138] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,123416] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[ +0,060579] wlo1: authenticate with 02:1a:11:f0:b4:f5
[ +0,006004] wlo1: send auth to 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,025826] wlo1: authenticated
[ +0,004879] wlo1: associate with 02:1a:11:f0:b4:f5 (try 1/3)
[ +0,008813] wlo1: RX AssocResp from 02:1a:11:f0:b4:f5 (capab=0x411 status=0 aid=1)
[ +0,007888] wlo1: associated
[ +0,000063] IPv6: ADDRCONF(NETDEV_CHANGE): wlo1: link becomes ready
[ +6,398959] systemd[1]: snapd.refresh.timer: Adding 5h 35min 12.410466s random time.
[ +0,000014] systemd[1]: apt-daily.timer: Adding 3h 15min 14.756509s random time.
^C
Successfully connected.
Once connected performance is great. Its just when making a new connection to a new network that it usually fails.
