[Kindle Fire Q&A, Help & Troubleshooting] blackkn1ght2010:
So today i found out i can't connect to internet anymore with my kindle. I tried flashing several roms (three different cm9 builds, modaco) but no dice... Here's the logcat of what happens when i turn on the wifi:

E/WifiStateMachine( 170): Failed to reload STA firmware java.lang.IllegalStateException: Error communicating to native daemon
W/CommandListener( 113): Failed to retrieve HW addr for wlan0 (No such device)
D/CommandListener( 113): Setting iface cfg
E/WifiStateMachine( 170): Unable to change interface settings: java.lang.IllegalStateException: Unable to communicate with native daemon to interface setcfg - com.android.server.NativeDaemonConnectorException: Cmd {interface setcfg wlan0 0.0.0.0 0 [down]} failed with code 400 : {Failed to set address (No such device)}
D/wpa_supplicant( 1057): wpa_supplicant v0.8.x-android-4.0.4_r1.2-48-gd933a3a
D/wpa_supplicant( 1057): Initializing interface 'wlan0' conf '/data/misc/wifi/wpa_supplicant.conf' driver 'nl80211' ctrl_interface 'N/A' bridge 'N/A'
D/wpa_supplicant( 1057): Configuration file '/data/misc/wifi/wpa_supplicant.conf' -> '/data/misc/wifi/wpa_supplicant.conf'
D/wpa_supplicant( 1057): Reading configuration file '/data/misc/wifi/wpa_supplicant.conf'
D/wpa_supplicant( 1057): update_config=1
D/wpa_supplicant( 1057): ctrl_interface='wlan0'
D/wpa_supplicant( 1057): ap_scan=1
D/wpa_supplicant( 1057): fast_reauth=1
D/wpa_supplicant( 1057): Could not open file /sys/class/net/wlan0/phy80211/name: No such file or directory
I/wpa_supplicant( 1057): rfkill: Cannot open RFKILL control device
D/wpa_supplicant( 1057): nl80211: RFKILL status not available
D/wpa_supplicant( 1057): nl80211: Set mode ifindex 0 iftype 2 (STATION)
D/wpa_supplicant( 1057): nl80211: Failed to set interface 0 to mode 2: -19 (No such device)
D/wpa_supplicant( 1057): nl80211: Try mode change after setting interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
D/dalvikvm( 904): GC_FOR_ALLOC freed 2304K, 49% free 4369K/8519K, paused 17ms
D/dalvikvm( 904): GC_CONCURRENT freed 2K, 28% free 6163K/8519K, paused 2ms+3ms
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
D/dalvikvm( 904): GC_FOR_ALLOC freed 742K, 29% free 6328K/8839K, paused 15ms
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1057): nl80211: Failed to set interface down
D/wpa_supplicant( 1057): nl80211: Interface mode change to 2 from 0 failed
D/wpa_supplicant( 1057): nl80211: Could not configure driver to use managed mode
E/wpa_supplicant( 1057): Could not read interface wlan0 flags: No such device
E/wpa_supplicant( 1057): nl80211: Could not set interface 'wlan0' UP
E/wpa_supplicant( 1057): wlan0: Failed to initialize driver interface
D/wpa_supplicant( 1057): Failed to add interface wlan0
D/wpa_supplicant( 1057): Cancelling scan request
D/wpa_supplicant( 1057): Cancelling authentication timeout
E/WifiHW ( 170): Supplicant not running, cannot connect
E/WifiHW ( 170): Supplicant not running, cannot connect
E/WifiHW ( 170): Supplicant not running, cannot connect
E/WifiHW ( 170): Supplicant not running, cannot connect
E/WifiHW ( 170): Supplicant not running, cannot connect
E/WifiStateMachine( 170): Failed to setup control channel, restart supplicant
E/WifiStateMachine( 170): Failed to reload STA firmware java.lang.IllegalStateException: Error communicating to native daemon
W/CommandListener( 113): Failed to retrieve HW addr for wlan0 (No such device)
D/CommandListener( 113): Setting iface cfg
E/WifiStateMachine( 170): Unable to change interface settings: java.lang.IllegalStateException: Unable to communicate with native daemon to interface setcfg - com.android.server.NativeDaemonConnectorException: Cmd {interface setcfg wlan0 0.0.0.0 0 [down]} failed with code 400 : {Failed to set address (No such device)}
D/wpa_supplicant( 1103): wpa_supplicant v0.8.x-android-4.0.4_r1.2-48-gd933a3a
D/wpa_supplicant( 1103): Initializing interface 'wlan0' conf '/data/misc/wifi/wpa_supplicant.conf' driver 'nl80211' ctrl_interface 'N/A' bridge 'N/A'
D/wpa_supplicant( 1103): Configuration file '/data/misc/wifi/wpa_supplicant.conf' -> '/data/misc/wifi/wpa_supplicant.conf'
D/wpa_supplicant( 1103): Reading configuration file '/data/misc/wifi/wpa_supplicant.conf'
D/wpa_supplicant( 1103): update_config=1
D/wpa_supplicant( 1103): ctrl_interface='wlan0'
D/wpa_supplicant( 1103): ap_scan=1
D/wpa_supplicant( 1103): fast_reauth=1
D/wpa_supplicant( 1103): Could not open file /sys/class/net/wlan0/phy80211/name: No such file or directory
I/wpa_supplicant( 1103): rfkill: Cannot open RFKILL control device
D/wpa_supplicant( 1103): nl80211: RFKILL status not available
D/wpa_supplicant( 1103): nl80211: Set mode ifindex 0 iftype 2 (STATION)
D/wpa_supplicant( 1103): nl80211: Failed to set interface 0 to mode 2: -19 (No such device)
D/wpa_supplicant( 1103): nl80211: Try mode change after setting interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
D/dalvikvm( 904): GC_FOR_ALLOC freed 1051K, 31% free 6296K/9095K, paused 15ms
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
D/dalvikvm( 904): GC_FOR_ALLOC freed 1005K, 31% free 6338K/9095K, paused 15ms
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
D/wpa_supplicant( 1103): nl80211: Failed to set interface down
D/wpa_supplicant( 1103): nl80211: Interface mode change to 2 from 0 failed
D/wpa_supplicant( 1103): nl80211: Could not configure driver to use managed mode
E/wpa_supplicant( 1103): Could not read interface wlan0 flags: No such device
E/wpa_supplicant( 1103): nl80211: Could not set interface 'wlan0' UP
E/wpa_supplicant( 1103): wlan0: Failed to initialize driver interface
D/wpa_supplicant( 1103): Failed to add interface wlan0
D/wpa_supplicant( 1103): Cancelling scan request
D/wpa_supplicant( 1103): Cancelling authentication timeout
D/OpenGLRenderer( 266): Flushing caches (mode 0)

So... is there any way to fix this or can i just throw it out of the window and simply buy a more reliable tablet (Asus' Nexus 7 comes to mind right now...)?