Re: CVS XFree86 i830 failure on DELL inspiron 2600

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On Fri, Feb 18, 2005 at 07:51:56PM +0100, Nicolas Joly wrote:
>On Thu, Feb 17, 2005 at 04:20:12PM -0500, David Dawes wrote:
>> On Thu, Feb 17, 2005 at 01:53:50PM +0100, Nicolas Joly wrote:
>> >On Wed, Feb 16, 2005 at 06:23:24PM -0500, David Dawes wrote:
>> >> On Wed, Feb 16, 2005 at 09:00:43PM +0100, Nicolas Joly wrote:
>> >> >
>> >> >Hi,
>> >> >
>> >> >I just tried CVS XFree86 on my DELL Inspiron 2600 with Intel 82830MP
>> >> >Integrated Video running under NetBSD/i386, and got bad results ...
>> >> >This machine worked flawlessly with the previous release (4.4.0), with
>> >> >1024x768, depth 16.
>> >> >
>> >> >When i try to start the server, problems begins ... The LFP remains
>> >> >black and the server start eating all the CPU !
>[...]
>> >The process is looping in `X86EMU_exec()'.
>> 
>> Yes.  One thing to do to help eliminate components outside of the driver
>> is to go back to the modular server, but replace the int10 and vbe
>> modules with those from 4.4.0.
>
>Done. Got the same results :-(
>
>> Another useful piece of information, if possible, would be to
>> compare the results with Linux on similar hardware when using the
>> vm86 version of the int10 module vs the x86emu version.
>
>Don't know much about linux ... But i checked the 4.4.99.901 snapshot
>with CentOS 3.4 rescue CD, with the same results. In the same time, i
>checked that the 4.3.0 server provided by the CD works fine.

OK, so that all points to the driver changes.

>> Another step would be to compare the sequence and parameters for the int10
>> calls made by the 4.4.0 version of the driver vs the current version.
>
>Will check and report a little later. Any simple way to proceed ?

The easiest way to do that would be to edit the xf86ExecX86int10_wrapper()
macro in i810/common.h and have it print out the ax, bx and cx
fields of pInt.  I would try that with and without enabling the
PrintErrorState() calls that are there.

David
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