Reproducible on Dell Latitude E6510, Ubuntu 12.04. WiFi is not visible
to mobile device.
$ uname -a
Linux simon-notebook 3.5.0-18-generic #29~precise1-Ubuntu SMP Mon Oct 22
16:31:46 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
$ dmesg
[ 584.948214] wlan0: Trigger new scan to find an IBSS to join
[ 590.101108] wlan0: Trigger new scan to find an IBSS to join
[ 593.115362] wlan0: Creating new IBSS network, BSSID de:e1:7d:82:75:d4
[ 593.118433] iwlwifi 0000:03:00.0: Unable to find TIM Element in beacon
[ 593.119681] iwlwifi 0000:03:00.0: Unable to find TIM Element in beacon
[ 593.120778] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
$ lspci -v
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at e6e00000 (64-bit, non-prefetchable) [size=8K]
Capabilities: [c8] Power Management version 3
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Device Serial Number 00-24-d7-ff-<redacted>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
$ ethtool -i wlan0
driver: iwlwifi
version: 3.5.0-18-generic
firmware-version: 9.221.4.1 build 25532
bus-info: 0000:03:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
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https://bugs.launchpad.net/bugs/786697
Title:
Unable to find TIM Element in beacon
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