wifi can't connect, phone reboots when turning wifi on/off

[pcppcp]

After the 21/1 update, phone seems to be not able to connect to certain wpa2 protected wifi network. In settings -> wifi it tries to connect repeatedly, failing on "obtaining IP address" message.

Another problem, maybe related to this, is reboot of the phone when wifi is turned off/on manually. System just shuts off after maybe ten seconds after switching wifi back on.

dmesg of failed attempt to connect to a wlan

<6>[   64.794231] wlan(0) 00:00:00:00:00:00 Standalone
<6>[   64.794475] cfg80211: Calling CRDA to update world regulatory domain
<7>[   64.795330] ieee80211 phy0: info: cfg80211 reg_notifier callback for country 00
<7>[   64.795330] ieee80211 phy0: country: CZ set by driver
<6>[   64.795330] cfg80211: World regulatory domain updated:
<6>[   64.795666] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
<6>[   64.795788] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   64.795910] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   64.795971] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
<6>[   64.796093] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   64.796215] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<3>[   65.381291] wlan: [768:E :PE ] wlan_cfgGetInt: 351: Not valid cfg id 1
<6>[   65.389317] wlan: connected to 00:21:27:de:35:9c
<6>[   65.389409] wlan(10) 00:21:27:de:35:9c Standalone
<3>[   65.453135] init: untracked pid 2855 exited
<3>[   67.146772] wlan: [779:E :SME] sme_FTUpdateKey: Unhandled state=0
<3>[   67.147108] wlan: [779:E :SME] sme_FTUpdateKey: Unhandled state=0
<3>[   69.340302] qtaguid: iface_stat: stat_update() wlan0 not found
<6>[   69.484510] setting pm_qos in msm_pcm_playback_copy with 1000
<6>[   69.484571] done setting pm_qos in msm_pcm_playback_copy
<3>[   69.999298] qtaguid: iface_stat: stat_update() wlan0 not found
<6>[   74.869311] updating pm_qos value to default msm_pcm_playback_close
<6>[   74.869464] done updating pm_qos value to default msm_pcm_playback_close
<6>[   74.897604] SLIM_CL: skip reconfig sequence
<3>[   76.679749] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   76.975797] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   80.344727] qtaguid: iface_stat: stat_update() wlan0 not found
<6>[   83.115397] adjust_soc: ibat_ua = 26000, vbat_uv = 4177090, soc = 99, batt_temp=189
<3>[   83.334228] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   84.405402] wlan: [768:E :SME] pmcTrafficTimerExpired: 1036: Remain in power active DHCP threshold reached FALLBACK to enable enter BMPS
<3>[   85.409003] wlan: [768:E :SME] sme_QosPmcDeviceStateUpdateInd: 7219: nothing to process in PMC state 6
<3>[   86.596490] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   87.104715] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   89.390996] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   89.678895] qtaguid: iface_stat: stat_update() wlan0 not found
<3>[   92.749763] qtaguid: iface_stat: stat_update() wlan0 not found
<6>[   93.566519] setting pm_qos in msm_pcm_playback_copy with 1000
<6>[   93.566610] done setting pm_qos in msm_pcm_playback_copy
<6>[   96.685304] updating pm_qos value to default msm_pcm_playback_close
<6>[   96.685853] done updating pm_qos value to default msm_pcm_playback_close
<6>[   96.715428] SLIM_CL: skip reconfig sequence
<3>[   97.828048] wlan: [768:E :SME] csrNeighborRoamIndicateDisconnect: 3742: Disconnect indication on session 0 in state 2
<3>[   97.828261] wlan: [768:E :TL ]  ----> CRegion 0, hRSSI -33, Alpha 5
<3>[   97.828444] wlan: [768:E :TL ]  ----> CRegion 0, hRSSI -33, Alpha 5
<3>[   97.828872] wlan: [768:E :HDD] hdd_tdlsStatusUpdate: DEL_ALL_TDLS_PEER_IND staIdx 0 00:00:00:00:00:00 
<3>[   97.828872] 
<3>[   97.829848] wlan: [768:E :PE ] limDeactivateAndChangeTimer: 1438: Deactivated probe after hb timer
<3>[   97.829940] wlan: [768:E :PE ] limSendDisassocCnf: 3507: FT Preauth Session (ec448000,0) Cleanup
<6>[   97.841446] wlan: disconnected
<6>[   97.841538] wlan(0) 00:00:00:00:00:00 Standalone
<6>[   97.845353] cfg80211: Calling CRDA to update world regulatory domain
<7>[   97.845841] ieee80211 phy0: info: cfg80211 reg_notifier callback for country 00
<7>[   97.845872] ieee80211 phy0: country: CZ set by driver
<6>[   97.845902] cfg80211: World regulatory domain updated:
<6>[   97.846055] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
<6>[   97.846146] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   97.846238] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   97.846390] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
<6>[   97.846574] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<6>[   97.846665] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
<3>[   98.355409] wlan: [768:E :HDD] hdd_tx_rx_pkt_cnt_stat_timer_handler: Disable split scan
<3>[   98.502456] wlan: [768:E :PE ] wlan_cfgGetInt: 351: Not valid cfg id 1
<6>[   98.510209] wlan: connected to 00:21:27:de:35:9c
<6>[   98.510331] wlan(10) 00:21:27:de:35:9c Standalone
<3>[   99.164138] wlan: [779:E :SME] sme_FTUpdateKey: Unhandled state=0
<3>[   99.165847] wlan: [779:E :SME] sme_FTUpdateKey: Unhandled state=0
<3>[  100.333496] qtaguid: iface_stat: stat_update() wlan0 not found

logcat just before reboot

D/WifiService(  604): setWifiEnabled: true pid=4119, uid=1000
W/Netd    (  170): No subsystem found in netlink event
D/NetlinkEvent(  170): Unexpected netlink message. type=0x11
W/Netd    (  170): No subsystem found in netlink event
D/NetlinkEvent(  170): Unexpected netlink message. type=0x11

[M1cha]

can u post last_kmsg after the reboot?

[pcppcp]

it's somewhat verbose, so i posted it to the pastebin.

http://pastebin.com/Yx6zTTgY

[M1cha]

and this just happens with the latest release? because I didn't change anything wifi related. Maybe you should try to update to the latest modem firmware, too

[pcppcp]

bug with wifi unable to switch back on did appear with 3/1 build, but the phone didn't reset. How do i update the firmware? Do i have to boot MIUI for that?

[M1cha]

u can download a flashable zip from here: http://xiaomi.eu/community/threads/radio-all-xiaomi-mi2-radio-thread.19846/

[pcppcp]

Great! It seems the new radio (3.5.17) did fix the reboot issue. I still can't connect, but there may be a problem with the router, as even the other phone won't get an IP. I think you can close this bug now. Thanks for your help!