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   Message 381 of 3,371   
   Doug Bissett to All   
   Re: New USB host controller drivers: usb   
   25 Dec 11 01:45:31   
   
   mail-complaints-to="news_AT_tioat_DOT_net"   
   From: "Doug Bissett"    
      
   On Sat, 24 Dec 2011 08:56:28 UTC, "Lars Erdmann"    
    wrote:   
      
   > Then you are a lucky man and there is nothing for you to do !   
      
   There is lots that I can do  :-)   
      
   > It's all so damn complicated to correctly INITIALIZE the HC HW: there is a    
   > relationship between an EHCI host controller and   
   > its associcated UHCI/OHCI "companion" host controllers. I am not sure but    
   > they even might partially share the very same HW !   
   > On some systems it's important that the EHCI host controllers claims    
   > ownership of the HC BEFORE the companion controller has a chance to do the    
   > same. On other systems this does not seem to matter.   
   > The USB specs for UHCI/OHCI/EHCI don't really go into this level of detail    
   > to be of any help. It's all trial and error.   
      
   I just tried it on a fifth machine. No problems with the order of    
   statements in CONFIG.SYS. All of these systems are quite different.    
   Some are using ACPI (3.18, or 3.19), and a couple of them are using    
   the old APM support. Of course, some of them do have problems caused    
   by ACPI, but they do work, once I found the right combination of    
   parameters. I doubt if your USB drivers will fix problems in ACPI.   
      
   I have one more old ThinkPad 390x to try it on, but it has only a UHCI   
   adapter (or perhaps an OHCI adapter). There is no EHCI adapter. Works    
   fine...   
      
   > For USBD.SYS: I recently added some stuff that brings it closer to the IBM    
   > driver (while also having introduced a fix that is NOT in the IBM driver +    
   > some other optimizations + "to be on the safe side" changes).   
   > Now, the driver might even be in the same shape as the 10.162 driver. But    
   > again, for some people, this modified driver does not properly work compared    
   > to the IBM driver. It needs more feedback. It's in its early stages.   
      
   All that I can say, is that it has given me no trouble, yet.   
      
   Thanks for all of your work.   
      
   --    
   From the eComStation of Doug Bissett   
   dougb007 at telus dot net   
   (Please make the obvious changes, to e-mail me)   
      
      
   --- Internet Rex 2.31   
    * Origin: The gateway at Omicron Theta (1:261/20.999)   

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