How Device Drivers Work?
Device drivers are used by the operating system to interact with hardware. The operating system uses functions in the driver to carry out actions on the hardware. Each driver has different functions, and each function corresponds to different hardware.For example, sound drivers helps take care of audio hardware and video drivers take care of the display.
The computer drivers create DOs, short for device objects, for each piece of hardware that it controls. To the driver, the DO is a representation of that specific hardware. The device objects are contained in a device stack. The are the FDO-upper level filter driver, FDO-function driver, Filter DO-bus filter driver, and PDO-bus driver. The stack is made up of DOs for handling an input/output (I/O) for each device.
The physical structure of a device driver is made up of a user mode, I/O manager, and a kernel mode.Breakdown of modes:API–programming application the operating system uses to start the I/O manager.Ntdll–Function library that uses stubs to start the operating system.NtReadFile–System used to create and control I/O requests.I/O Manager–Subsystem in charge of all devices that decides what each driver is allowed to do.IRP–Request packet used by the I/O to ask for information from drivers.IoCallDriver–Sends IRPs to the correct driver that is associated with each DO.In the user mode, the application connects to the API, which connects to the Ntdll. The application request then moves into the kernel mode through the I/O manager. The I/O mangers uses a NTReadFile to process the request and sends it to the IOCallDriver, which in turn sends the information to the correct driver. The driver then decides what to do with the request. It will queue it for later, send it to a hardware port or send it to another driver.
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August 17, 2009 @ 11:22 pm
After using computers for so long still I was not so much familiar with working of the drivers and this one is good informative blog.
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August 17, 2009 @ 11:57 pm
I have switched to using, primarily, an operating system ( OS ) other than windows, but for more than 83% of my adult life, until now, I used a windows operating system ( OS ). Finding device drivers, updating drivers, etc, is, to my recollection, one of the most unpleasant aspects of using the windows operating system ( OS ).
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August 18, 2009 @ 2:19 am
In the case of embedded devices, the specific behavior of the device is more closely related to the program in general than in higher level programming situations.
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August 18, 2009 @ 3:49 am
How do I fix the ‘No device drivers were found’ problem when installing Vista?
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August 19, 2009 @ 11:40 pm
But usually the Dell drivers don’t give out problems if you do decide to use them. But its up to you on what its worth for someone else to fix the computer if the upgrade does mess up.
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August 31, 2009 @ 2:05 am
Yea Dell’s drivers don’t pose much of a problem… however the windows drivers sometime makes it really annoying to get reinstalled after the format of the hard drive.
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August 31, 2009 @ 5:34 pm
Can I write a new one Windows INF File for that devices which has not a driver CD’s or Floppies? Is it possible according to you?
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September 2, 2009 @ 2:41 am
I have a Dell Inspiron 1525, and I had to upgrade the touchpad driver and WLAN wireless card driver because both were not working right. On Dell’s website, there are many other drivers for my specific computer that they “recommend”. One is for the audio, which works fine at the moment. I make restore points before I upgrade anything like this, but I still worry about upgrading too much and messing something up. So, is it better to upgrade computer drivers or leave them alone if they’re working fine
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September 15, 2009 @ 1:31 am
The driver then decides what to do with the request. It will queue it for later, send it to a hardware port or send it to another driver.
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September 21, 2009 @ 4:01 pm
How do I fix the ‘No device drivers were found’ problem when installing XP?
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September 30, 2009 @ 1:51 am
that’s absolutely wonderfully described.this will definitely increase my knowledge.
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October 7, 2009 @ 3:26 am
.In the Device Manager console, right-click the device whose driver you want to rollback, and then click Properties. If the device is not working, it will likely appear with a red X or a yellow question mark.
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October 8, 2009 @ 4:33 am
Yes use exactly same method to check the working of the devices and Drivers. If everything would be OK in your system then you will see a message by seeing properties that device is working .
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October 14, 2009 @ 2:30 pm
It’s a good summary, would help me in giving a presentation on this.
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October 22, 2009 @ 1:06 am
How can i install my modem driver from internet ?
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October 22, 2009 @ 3:31 am
Most hardware is plug and play these days anyway…
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October 22, 2009 @ 5:58 am
this is great to read , I appreciate it that you shared something so useful with the readers of this blog.
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October 29, 2009 @ 11:08 pm
Its crazy to think how many different people it took to create each component that makes computers run. What a world. Good post.
Sally Said,
October 30, 2009 @ 7:20 am
It was interesting to know the mechanism of functioning of a device driver. As I’m a girl such topics are usually difficult for me to cope with but with the help of you article I understood almost everything!
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November 3, 2009 @ 8:46 am
I’m glad most products come with device drivers. It’s probably crucial to support their products adequately and device drivers is a big part of that.
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November 13, 2009 @ 7:35 pm
Device drivers must be compatible with the Operating system of your computer to avoid conflict. This is a very informative article that every person must read.
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November 16, 2009 @ 11:33 pm
Really wonderful piece of information and I appreciate it that you share something so useful with the readers of this blog.
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December 3, 2009 @ 3:37 pm
Sound drivers are always a problem to me, dont; know why they work properly. Well, the article gives me proper understanding of device drivers.
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December 4, 2009 @ 7:55 am
Well, that is quite a informative post. The last night I had my sound driver corrupted and could not watch a movie that cost me a few hours and did not not watch it till date!
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December 10, 2009 @ 9:59 am
Find right drivers for own computer is not always simple, and can to be time consuming, so I use Driver Detective, that has the bigger online databse in the world, perfect even for laptops and available even for Windows 7
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December 15, 2009 @ 4:03 am
I don’t recommended to search drivers in databases…You should to search in the official website of the product. They will have the last version.
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December 16, 2009 @ 5:52 pm
i was not aware of the working and interaction of device drivers but this post of yours helped to gain knowledge about it.
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December 18, 2009 @ 1:15 pm
I make restore points before I upgrade anything like this, but I still worry about upgrading too much and messing something up.
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December 23, 2009 @ 12:46 pm
It is key to only install device drivers from Verified Publishers with Signatures.
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December 24, 2009 @ 11:44 am
Agree with Microsoft Points. Device driver should not be used or installed provided by unauthorized or insecure publishers.
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January 8, 2010 @ 3:35 am
Very good information regarding how device driver works is discussed here in this blog.A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware connects.Device drivers serve their purpose with little input from users. Once installed, you may never deal with your device driver directly. Instead, it sits in the background waiting until the operating system calls on it.
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February 2, 2010 @ 10:49 am
Drivers plays an important role in working a device properly. Drivers should be compatible the OS in order to work flexibly.
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It’s very clever how they work, I couldn’t live without them.
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February 4, 2010 @ 5:11 am
Hi,
make regular drivers updating is really important for computer performances, above all video and audio drivers.
To save time it’s better use a program for make update automatically, like driver detective or driver robot
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February 26, 2010 @ 3:28 pm
The last night I had my sound driver corrupted and could not watch a movie that cost me a few hours and did not not watch it till date!
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March 4, 2010 @ 1:19 pm
But sometimes it becomes too hard to find a device driver and sometimes it makes the device driver installation not possible especially with windows device driver.
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