| Doc ID: | 56 |
| Product: | WinDriver |
| Version: | -- |
Windows XP crashes (BSOD) when I listen to an isochronous pipe on my USB device. |
Currently, when performing repeated USB read transfers from an isochronous pipe ("listening" to the pipe) on Windows XP, the OS may eventually crash (resulting in the Blue Screen of Death -- BSOD). This happens when using a high-speed USB device that is not configured as a high-bandwidth device, and setting the device's bInterval descriptor field to 0x1 or 0x2 (an interval of 1 or 2 microframes) and its wMaxPacketSize descriptor field to 0x0400 (maximum packet size of 1KB). When listening to an isochronous pipe of a device with this configuration, on Windows XP, the DMA operation performed by Microsoft's usbport.sys driver, as part of handling the isochronous read transfers, may cause the OS to crash. A possible work-around for this problem is to set the value of the device's bInterval descriptor field to 0x4, instead of 0x1 or 0x2. Back to Top |
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