1. Sound card driver Sound.c
(1) The entry function registers the file_operations structure with the Register_chrdev () function.
(2) File_operations structure, there is only open function, there is no read and write function, we can see that the open function is the function of the transfer, will definitely find a new file_operations structure
(3) Call procedure
Save the secondary device number of the i
Under Fedora11, the sound card cannot be driven-Linux general technology-Linux technology and application information. The following is a detailed description. The problem with the sound card driver has been bothering me for a long time. It is impossible. It will take nearly a week for me to get rid of
Open integrated Sound Board integrated sound system The default state is generally open. There are two ways to open an integrated sound card.
One is the BIOS setup method. In the case of award type BIOS, it is generally possible to find the "AC ' Audio" option in the "Integrated peripherals" (built-in integration sett
1 The BIOS is not familiar with user misuse of the onboard sound screen.
Enter the BIOS, select I/O Device configuration→onboard AC97 Audio Controller, choose Enanle or Auto. This process is in the author's Asus Motherboard, on other motherboards are basically similar, if it is award bios, into the BIOS in the "intergrated peripherals", and then select "AC97 Audio" Change "Auto" for "Disable" Save you can
In the third step, select the
Alsa sound card configuration problems-general Linux technology-Linux technology and application information, the following is a detailed description. Hello everyone! I used debian4.0, but the sound card was not configured after the system was installed.
As a result, I used the alsaconf command to configure the
I believe that the operation of the Win7 flagship 64-bit system download the friend must be a few? Although the WIN8 system has gradually become perfect, but we still reluctant to give up the experience is a good Win7 flagship version. But do you have some difficult problems to solve when you operate Win7 flagship computer? If so, let's write it down and tell the little one that we can all discuss the solution together. This is not, small weave today received a friend message, said is his own Wi
In some applications that use sound cards for audio collection, there are usually the following functional requirements: when the program starts, it is required that a specific input terminal be automatically selected for the sound card-for example, some common collection programs want to use "line in" as the default input, and some video conferencing software, y
1. First of all, we will buy the built-in sound card USB speaker connected to the Win7 flagship computer, under normal circumstances, the computer will automatically switch the sound card to the USB sound card.
2. After that, we
General computer in the process of using the integrated sound card can not work properly, such as: 1 Microphone no echo 2 speaker can not make a sound 3 driver installation can be judged bad. At this point you can buy an independent sound card to plug into the white PCI slot
Updating the sound card driver is a common computer operation, but a lot of friends in the update of the sound card when encountered some problems, and the higher the rate is about the problem of reloading the sound card, the foll
DAPM is the acronym for Dynamic Audio Power management, which means that the audio subsystem on a Linux based mobile device is designed to work in a minimum power state at all times. DAPM is transparent to user-space applications, and all power-related switches are done in ASOC core. User-space Applications do not need to modify the code, and do not need to recompile, DAPM the power switch of the audio control is turned on or off, depending on the configuration of the current active audio stream
(a) Right-click My Computer----Properties---Hardware----Device Manager, expand Sound, video, and game controllers to see if there is a yellow "?" in front. Number, there is a lack of sound card driver, there is "!" , the sound card driver is not working properly, right-click
1, think the more expensive sound card quality will certainly be good
A variety of sound card price gap is very large, from dozens of yuan to thousands of dollars have. Although "a penny a price," but at the same time is not the price of the more expensive sound
One, the computer has no sound. There is no sound in listening to the music or watching the video, and there are some possible reasons for the computer failure:
1. The output device and interface connection appear abnormal.
It is recommended to replace another headset, if the sound is normal, positioning for the original equipment has problems, it is recommende
When the user is using the computer to record, the microphone and the sound card connection are normal, but cannot carry on the recording. Now the integrated sound card is generally a full-duplex sound card, the recording part of
Why install sound card UAA bus driver, install this thing still need to install sound card driver? What is the sound card UAA bus driver? Today, Amy asked Adam questions. Because she is still using the Win2000 system, hehe. People
What if the motherboard sound card is broken?
If the sound card does not work, you should first check to see if the sound card is enabled. In particular, the motherboard integrated sound
We listen to music on the Win7 computer or watch video, found that the computer does not sound, it may be the sound card driver problems. We can reinstall the sound card driver, but in the process of reloading, prompted the installation failed, what can I do? The following i
Some experiences of installing the alsa sound card driver in Linux are expected to help those who fail to install the driver-Linux general technology-Linux technology and application information. The following is a detailed description. Which of the following is my personal information? Maybe you only have one thing missing, or more, double or totally different situations, however, I still hope that the fol
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