Click Device Manager Once device manager is open, select the device, right click it and click Update Driver Software This will launch the update driver software wizard, which presents two options.
This article describes an issue that occurs when you use a FireWire port-based device in Windows 8.1 or Windows 8. Additional steps of configuration is required to enable this update after the installation.
Symptoms
Assume that you have a computer that equips with an IEEE 1394 FireWire controller card. After you upgrade the computer from Windows 7 to Windows 8.1 or Windows 8, devices that connect to the computer by using a FireWire port do not work.
Cause
- On Windows 10, a device driver is an essential piece of code, which allows the system to interact with a specific hardware (such as graphics card, storage driver, network adapter, Bluetooth, etc.
- Acronis True Image for Western Digital. Data Lifeguard Diagnostic for Windows. GoodSync for WD. Install WD Discovery for Windows.
- A minidriver or a miniport driver acts as half of a driver pair. Driver pairs like (miniport, port) can make driver development easier. In a driver pair, one driver handles general tasks that are common to a whole collection of devices, while the other driver handles tasks that are specific to an individual device.
This issue occurs because the legacy 1394 bus drivers (1394bus.sys and Ochi1394.sys) are removed in Windows 8.1 or Windows 8.
Resolution
Update information
How to obtain this update
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
Operating system | Update |
|---|---|
All supported x86-based versions of Windows 8.1 or of Windows 8 | |
All supported x64-based versions of Windows 8.1 or of Windows 8 |
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
Additional steps of configuration requirement
After you install the 1394 OHCI Legacy Driver.msi file, follow these steps:
Right-click the Legacy1394.inf file under one of the following paths based on the computer's architecture:
C:Program Files1394 OHCI Compliant Host Controller (Legacy)x86_driver
C:Program Files1394 OHCI Compliant Host Controller (Legacy)x64_driver
Click Install.
Open Device Manager in Control Panel.
Expand IEEE 1394 Bus host controllers, and then locate the host controller.
Right-click the host controller, and then click Update Driver Software.
The screen shot of the host controller and the Update Driver Software is listed in the following example:Click Browse my computer for driver software.
Click Let me pick from a list of device drivers on my computer.
Click Generic1394 OHCI compliant host controller (Legacy), and then click the Next button.
Click the Close button.
Prerequisites
There are no prerequisites for installing this update.
Registry information
To apply this update, you do not have to make any changes to the registry.
Restart requirement
You have to restart the computer after you apply this update.
Update replacement information
This update does not replace a previously released update.
File information
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 8.1 and Windows 8 file information notesThe MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are not listed
For all supported x86-based versions of Windows 8.1 or of Windows 8
File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
1394_ohci_legacydriver.msi | Not Applicable | 208,896 | 15-Aug-2014 | 20:48 | Not Applicable |
For all supported x86-based versions of Windows 8.1 or of Windows 8
File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
1394_ohci_legacydriver.msi | Not Applicable | 208,896 | 15-Aug-2014 | 20:48 | Not Applicable |
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the 'Applies to' section.
More Information
Steps of uninstalling the 1394 OHCI Legacy Driver.msi file
Open Control Panel in the Category view.
Click Uninstall a program in Control Panel.
Right-click 1394 OHCI Compliant Host Controller (Legacy), and then click Uninstall.
The screen shot of uninstalling the 1394 OHCI Compliant Host Controller (Legacy) is listed in the following example:
Additional package information
This driver is only intended to work with legacy 1394 host controllers. Therefore, you may experience lower transfer data rates than the 1394b driver.
The driver is intended to resolve compatibility issues for 1394 peripherals on 1394b systems. If you are not experiencing these issues, you should continue to use inbox drivers that are provided in Windows 8.1 or Windows 8.
You have to reinstall this stand-alone driver package if you upgrade to a newer operating system version in the future.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Summary :
Have you come across the DisplayPort no signal issue? This problem often occurs when connecting ASUS monitor via DisplayPort. What causes DisplayPort not detected? How to fix this vexing problem? Now, try these top 5 troubleshooting methods of MiniTool.
Quick Navigation :
What Causes the DisplayPort No Signal Issue
DisplayPort is a digital display interface that can connect your devices to a monitor for better performance. Besides, it can be used to carry different types of data such as audio, video, and USB. However, a great number of users are bothered by the DisplayPort no signal issue when using ASUS monitor.
What causes the DisplayPort no signal ASUS problem? According to the user reports, here are several common causes behind the error:
- Broken display port: If the DisplayPort is broken or loose, there may be no dp signal from your device.
- Outdated or missing device drivers: It is another common reason for DisplayPort no signal Windows 10. You should try updating to the latest device driver.
- Inappropriate refresh rate: It is a software issue that may lead to the DisplayPort not detected issue as well.
Now, you may have an overall understanding of the possible causes. To troubleshoot this problem, the following 5 accessible methods are explored. You can try them one by one until you fixed the issue.
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Fix 1. Redstart and Reconnect the Devices
The simplest and fastest method to fix the display port no signal issue is to restart and reconnect your device. Here’s how to do that:
Step 1. Turn your computer off entirely.
Step 2. Disconnect all monitors and the power cables from your computer.
Step 3. Unplug the DisplayPort connection and wait for a couple of minutes.
Step 4. Reconnect the monitor that you encounter the DisplayPort monitor not detected issue to the computer.
Step 5. Plug the power cable back to the device and turn on your PC.
Now, you can try connecting the monitor via the DisplayPort interface and check if the issue is resolved or not.
Fix 2. Update the Device Driver
If the graphics card driver on your computer is not the latest build, you may also counter the display port no signal issue. You can fix it by updating the device driver to the latest version. For that:
Step 1. Right-click the Start menu and select the Device Manager option from the context menu.
Digital Port Devices Driver Downloads
Step 2. Expand the Display adapters category, and then right-click the device driver that you want to update and select the Update driver from the context menu.
Step 3. In the pop-up window, click on the Search automatically for updated driver software option to start installing the latest graphics card driver. After that, you can follow the on-screen prompts to complete this installation.
Fix 3. Change the Refresh Rate on the Monitor
As pointed out on the above, the appropriate refresh rate is also responsible for the DisplayPort no signal ASUS issue. Changing the refresh rate on your monitor has been proved by some users to be useful. So, it’s worth having a try.
How to set dual monitor wallpapers in Windows 10? It is still a mystery for a great many people. Now, this post will walk you through detailed steps.
Fix 4. Check Your DisplayPort Connection
If the DisplayPort connector is plugged into the port improperly or loosely, you will encounter this annoying problem. So, please make ensure that the connector has been plugged into the port properly and don’t plug it out too frequently.
You can check if the DisplayPort is connected properly by unplugging and re-plugging it. Then further pushing the connector until the pointy bits are locked on the plug firmly so that you can’t pull it out easily.
Fix 5. Switch to Another Cable or Device
Free Device Driver Downloads
Apart from the software issues, the hardware issue can also lead to the “no dp signal from your device” issue. If all the above methods fail to work, you may consider switching to another cable and device. You can test the DisplayPort connection on another DisplayPort cable or on another computer and monitor.
Usb Port Driver Download
If the DisplayPort no signal error also occurs on another device or cable, it indicates that your DisplayPort connector may suffer from some hardware issues. You can ask for assistance from the manufacturer within the warranty period.