site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Hi Amit, I am trying to execute the code written below. Here IOServiceOpen is giving error -536870203 Can any one tell the reason for this error. There's documentation that describes how to interpret I/O Kit error codes. <http://developer.apple.com/documentation/DeviceDrivers/Conceptual/AccessingHardware/AH_Handling_Errors/chapter_6_section_2.html> In this case, -536870203 is 0xe00002c5, which indicates a system of I/O Kit (0x38) and, within that, the common subsystem (0). The error value is that in <IOKit/IOReturn.h>, namely: There's documentation about this error code as well. <http://developer.apple.com/documentation/DeviceDrivers/Conceptual/AccessingHardware/AH_Handling_Errors/chapter_6_section_3.html> What is it you are trying to do? Cheers, -- J-Sun Seng Networking & Communications / Hardware Developer Technical Support Apple Computer, Inc. #1 Infinite Loop M/S: 303-2T Cupertino, CA 95014 _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... At 17:14 +0530 15/4/05, Amit Gupta wrote: #define kIOReturnExclusiveAccess iokit_common_err(0x2c5)// exclusive access and // device already open The Window Server has the IOFramebufferUserClient open exclusively, thus the reason for the error you are seeing. This email sent to site_archiver@lists.apple.com