[Thinkpad Tablet Android Development] drphrozen:
It is true that you can have a very stable system, but the bug is still there.

The problem occurs if you turn of your gateway, or if your tablet gets out of reach. The issue only seems to occur if your wifi is in standby.

And yes, i have a clean install, i tried always on, but that only works as long as the wireless gateway is always in the vicinity.

I have dumped logcat during the period and found the following lines, i also filtered the list to only include wpa/wifi stuff:

01-06 00:25:50.280 D/WifiStateChangeListener( 8534): received broadcast intent with action: android.net.wifi.STATE_CHANGE
01-06 00:25:50.280 D/WifiStateChangeListener( 8534): isConnected: false
01-06 00:25:50.280 D/WifiStateChangeListener( 8534): use_wifi_sync is: false
01-06 00:25:50.290 D/WifiStateChangeListener( 8534): received broadcast intent with action: android.net.wifi.supplicant.STATE_CHANGE
01-06 00:25:50.290 D/WifiStateChangeListener( 8534): isConnected: false
01-06 00:25:50.290 D/WifiStateChangeListener( 8534): use_wifi_sync is: false
01-06 00:25:53.090 D/UploadsManager( 8569): wifiOnlyPhoto changed to true
01-06 00:25:53.090 D/UploadsManager( 8569): wifiOnlyVideo changed to true
01-06 00:25:53.470 D/PicasaUploader( 8587): wifiOnlyPhoto changed to true
01-06 00:25:53.470 D/PicasaUploader( 8587): wifiOnlyVideo changed to true
01-06 00:25:57.700 E/wpa_supplicant( 344): ioctl[SIOCSIWPRIV] (pnosetup): -1
01-06 00:26:03.690 D/ConnectivityBroadcastReceiver( 8674): Network info type is WIFI
01-06 00:26:03.920 D/ConnectivityBroadcastReceiver( 8674): Network info type is WIFI
01-06 00:26:05.280 E/wpa_supplicant( 344): ioctl[SIOCSIWPRIV] (pnosetup): -1
01-06 00:26:05.280 I/wpa_supplicant( 344): wlan0: CTRL-EVENT-DRIVER-STATE HANGED
01-06 00:26:05.360 D/WifiStateChangeListener( 8534): received broadcast intent with action: android.net.wifi.STATE_CHANGE
01-06 00:26:05.370 D/WifiStateChangeListener( 8534): isConnected: false
01-06 00:26:05.370 D/WifiStateChangeListener( 8534): use_wifi_sync is: false
01-06 00:26:05.400 D/WifiStateChangeListener( 8534): received broadcast intent with action: android.net.wifi.supplicant.CONNECTION_CHANGE
01-06 00:26:05.400 D/WifiStateChangeListener( 8534): isConnected: false
01-06 00:26:05.400 D/WifiStateChangeListener( 8534): use_wifi_sync is: false
01-06 00:26:05.880 I/wpa_supplicant( 344): wlan0: CTRL-EVENT-TERMINATING
01-06 00:26:06.180 E/WifiHW ( 270): Unable to open connection to supplicant on "wlan0": No such file or directory
01-06 00:26:08.450 D/WifiStateChangeListener( 8534): received broadcast intent with action: android.net.wifi.supplicant.CONNECTION_CHANGE
01-06 00:26:08.450 D/WifiStateChangeListener( 8534): isConnected: false
01-06 00:26:08.450 D/WifiStateChangeListener( 8534): use_wifi_sync is: false
01-06 00:26:08.470 E/wpa_supplicant( 8810): ioctl[SIOCSIWPRIV] (pnosetup): -1

I think it has to do with the: Unable to open connection to supplicant on "wlan0": No such file or directory. :confused:

I would try to fix it myself, but it has been too long since i last fiddled with kernel and drivers :)

Oh, and this is my tablet info:

build.board: Indigo
build.bootloader: unknown
build.brand: Lenovo
build.cpu_abi: armeabi-v7a
build.cpu_abi2: armeabi
build.device: Indigo
build.display: cm_Indigo-userdebug 4.1.2 JZO54K eng.koshu.20121208.112621 test-keys
build.fingerprint: Lenovo/ThinkPadTablet/Indigo:4.0.3/ThinkPadTablet_A400_03/0069_0130_WE:user/release-keys
build.hardware: ventana
build.host: koshu-desktop
build.id: JZO54K
build.manufacturer: LENOVO
build.model: ThinkPadTablet
build.product: ThinkPadTablet
build.radio: unknown
build.serial: MP052RZ
build.tags: test-keys
build.time: 1354962440000
build.type: userdebug
build.user: koshu
version.codename: REL
version.incremental: eng.koshu.20121208.112621
version.release: 4.1.2
version.sdk_int: 16