If you are a programmer you maybe have found the same problem in Huawei U8650, there is no LogCat, you plug and unplug, look everywhere, everything is fine, it's just there is no LogCat. You can try to view the log with this command
adb logcat
You get the following error
Unable to open log device '/dev/log/main': No such file or directory
There is an easy solution, open the hidden menu by one of the following options
- Type the Dial (as calling) the code
*#*#2846579#*#*
- Execute in the commandline
adb shell am start -a android.intent.action.MAIN -n com.android.settings/com.android.settings.TestingSettingsHW
Once the configuration menu is open go to ProjectMenu->3. Background setting->2. Log setting->Log switch and select the option "LOG on"
Now go to ProjectMenu->3. Background setting->2. Log setting->->Log level setting and select "VERBOSE" or the desired level.
Now you need to reboot the device, that can be done by the command
adb reboot
To deactivate just rever the changes.
It could be necessary to modify the options of the following screen
ProjectMenu->3. Background setting->7. Dump&Log
Not in my case.
Happy hacking!!!