Power saving features added to the chipsets of more recent CPUs can interfere with data transmission. Adjusting the settings of some of these features may address image loss when running PixeLINK cameras at higher data rates.
- disable - Specifies that the processors are NOT permitted to enter idle states (use this if you experience performance issues.
- enable - Specifies that the processors are permitted to enter idle states (system default).
- print - Indicates if the processors are currently permitted to enter idle states.
- hide – Hides the idle state control of all power schemes. This control is hidden by default, and is only available with Windows Vista and newer.
- expose - Un-hides the idle state control for all power schemes from (it's default) hidden state. Only available with Windows Vista and newer.
Download PixeLINK PxLProcessorIdle utility (.exe)
Enhanced Halt State
Popdown/Popup Mode on Laptop/Notebook Computers
On laptop/notebook systems, changing the Popdown or Popup Mode may fix the issue. To do this, use the RightMark CPU Clock Utility, downloadable from:
The relevant settings are found in the Advanced CPU settings window, as shown in the following screenshot:
Bandwidth issues on FireWire systems
- The PCI bus gets saturated.
- Memory bus bandwidth gets saturated.
- The PC cannot keep up with the interrupts being generated.
PCI bus saturation is a common situation and can happen for a number of reasons, including:
- Running multiple 1394 cameras at high frame rates that push 1394 bandwidth limits. For more information.
- Large hard disk reads/writes.
- Heavy network traffic.
Typically, synchronization packets prevent repeated image tearing. When data is dropped, the current image is lost, but the image corrects itself for the next frame, unless data is dropped from that image as well. Note that general FIFO overflows occur at the lowest level of the Windows IEEE-1394 substructure, making them beyond the control of PixeLINK drivers and software.
Laptop (Notebook) C3 Power State Transition
Corrupted data when using the IEEE 1394 port on a laptop (notebook) computer can be caused by too much latency in the C3 power state transition, which causes buffer underruns. In other words, the interrupts associated with the processor's ability to dynamically change speeds conflict with the high demand on the processor that is needed when streaming video or data across the IEEE 1394 port. This has been seen on laptops from various manufacturers.