1 We click on the mobile desktop "settings" and then find "about the phone" to enter after the click "More" specific as the figure.
2) and then we find the version number, and then we click on 4 consecutive times, and then from "General"-"more".
3 good so in more inside will see there is a "developer option, and finally the USB debugging appears
Summarize
In fact, all Android 4.2 and later version of the
1. As shown in the following figure, we click the "Settings"-"All settings" interface in the Millet 3 phone.
2. Then in the following figure you will see a "about the phone" option, click Enter, and then see the Android version of the option.
3. Here I can open the developer option by simply clicking "Android Version" four times in a row.
4. In the developer options interface can be found in the USB debugging mode, click to open the
Recently, ACPI is a power management protocol architecture of Intel, Microsoft, and other vendors on x86.
My suspend to ram still cannot be wakeup. the S3 sleep status seems perfect, and even the power button lights are the same as the standard S3 sleep. The light of the light green lights flash, but after the second press the power button, yarn cannot return to the previous state. The yellow light flashed twice and then rose from the IDE. Obviously, the BIOS failed to identify the sleep status
Two methods:One: During installation:After the custom creation of the partition,Select the location where the system launcher is installed, in the change deviceSet the first start device, and the second start device!Second: After installation:
Boot does not enter the system press F2, enter the BIOS
After entering the BIOS, change secure Boot to Disabled
Finally, change boot List Option to Legacy
Reboot, OK!
How to start the USB flash
Tool Preparation
① make a quick Start U disk Startup disk② a ghost Win7 system image file and deposit into the prepared Quick Start U disk Boot disk mode to AHCI mode
Fast Start USB disk Installation System Tutorial
We put the production of U disk Boot disk inserted in the computer USB interface, and then restart the computer, in the presence of the boot screen long press the start shortcut to enter the
1 We first click on the phone "settings" and then into the Vivo xshot mobile phone "about the phone" interface.
2 In addition, we open the "about the phone" continuously non-stop click Version number, until the phone prompts "you are in the developer mode, do not need to do this" we can not click.
3) Then we go back to the "setup" of the phone just now and you will see there is a "developer option" we click on it to go in again here to find "USB
1 Click the "Settings" icon to enter, in the "More" menu bar to find "about the device", and then click Enter. (as shown in the following figure)
2 Click on "About Equipment" to enter, find "build number", continuously click on the "Build Number" column, until the display "No need, developer mode is enabled" after the stop. (as shown in the following figure)
3 Finally, return to the "Settings" menu bar, you can see the "Developer Options" Menu key. Click on "Developer Options" to enter, ch
1. Click "About Phone" as shown in the picture after "setting" the phone to enter the setting.
2. On the phone we find "version number" has been clicked Non-stop Click on the phone to wait for the screen to appear "You are in the developer mode!" "No more, please."
3. Then we return to the phone's "settings" Here you will see that there is a "developer option" now click to enter after we can see "USB debugging", remember to hit the back of "√."
1 First, we will open the developer selection, enter the phone "settings" and click "About the Phone" click on open Access. (pictured below)
2 After we click on the phone in the "version number", see the ScreenTip "You are in the developer mode!" "No, then we'll go back to the Settings page and we can find the developer option at the bottom." (pictured below)
Now to open the USB mode, we click on the mobile desktop "Settings", drop-down m
With USB3.0 control chip motherboard, although has become the mainstream of the market, but for most users still use USB2.0, USB2.0 file transfer speed also seems to be unable to meet their requirements. In fact, now USB2.0 speed there is room for improvement, we can use the speed-increasing patch to explore the potential of USB2.0.
USB 2.0 Why not reach the 60mb/s?
We all know that the theoretical bandwidth of
If you want to connect to the 91 assistant and other related software must turn on the USB debugging section, we operate the method is very simple, click on the Phone "application" (Note on the Phone desktop standby state).
2. Then we find the application below the "set" icon to click on it to enter.
3. Here we will see there is a "about the device" click on it to enter.
4. Then in the open about the device interface will hav
Question 1: The computer USB interface is very slow to charge
The computer charge itself is slower than the direct connection to the power supply, because the computer's USB current is small, generally can not reach the standard of electrical appliances, so we try to use the power to charge.
Question 2: Millet 4 is very slow to charge
Charging speed and charge current and battery activity related, if t
In 1991, one introduced the concept of pipelines in Linux and used pipelines in many places, such as file systems and device drivers. So we can see that there are various pipelines in Linux. But the same thing is that all pipelines are used to transmit things, but some pipelines transmit real material while some pipelines transmit data.
The pipe we see in the USB code is used for data transmission and communication. Communication is from both parties,
This article was reproduced from: http://blog.csdn.net/u013686019/article/details/50165059[HTML]View PlainCopy
android:4.4.4
First, the problem analysisWhen the USB printer is plugged into an Android device, there is no printer node (/DEV/USB/LP0) generated in the System/dev directory.The first reaction is to check the printer device and access the Ubuntu-equipped PC, normal: /dev/
USB device is a collection of ports, interfaces, configurations, USB protocol is a variety of USB descriptors to characterize the function of USB devices. The computer uses these descriptors to obtain the functionality of the USB device.USB descriptors include:
Usb_stor_control_thread () is basically finished, but the following lines are the climax of the climax. The so-called bulk-only protocol for batch transmission. It is shown here.
371/* we 've got a command, let's do it! */
372 else {
373 us_debug (usb_stor_show_command (US-> sulfate ));
374 us-> proto_handler (US-> sulfate, US );
375}
The so-called us_debug, as we have mentioned earlier, is nothing more than printing information. At present, this sentence is to execute the function usb_stor_show
Storage_probe is a very interesting function with a total length of less than 100 rows, but has done a lot of things. It is like the Back Waist on the football field, such as Chelsea's mark le. It is not remarkable on the court, however, they have made outstanding contributions to the entire team.
Let's continue to read the storage_probe code:
972 mutex_init ( (us-> dev_mutex ));
973 init_MUTEX_LOCKED ( (us-> sema ));
974 init_completion ( (us-> notify ));
975 init_waitqueue_head ( us-> del
the daemon loops.
Line 3: as long as the result of the preceding command is that the result of the port-> result is not DID_ABORT, the command is successfully executed. So we call the scsi_done function.
Row 390, SkipForAbort, is a row flag that corresponds to the previous goto SkipForAbort statement. To continue, Row 3 and the preceding comments are also quite clear. If us_f1_x_timed_out is set, the process with this flag is actually wakened by command_abort, we will talk about command_abort
Usb_stor_control_thread () is basically finished, but the following lines are the climax of the climax. The so-called Bulk-Only protocol for batch transmission. It is shown here.
371/* we 've got a command, let's do it! */
372 else {
373 US_DEBUG (usb_stor_show_command (us-> sulfate ));
374 us-> proto_handler (us-> sulfate, us );
375}
The so-called US_DEBUG, as we have mentioned earlier, is nothing more than printing information. At present, this sentence is to execute the function usb_sto
1. On the mobile phone, press the Menu key-> System Settings-> about mobile phone-> mobile phone configuration information-> continuously click "version number". Then we can see a prompt on the mobile phone..Step 2. After opening it, click "system settings"-"developer options" and select "USB debugging.Okay, then we can connect the mobile phone to the computer for flash or software installation.
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