Redhat 7.3 and ATI Radeon 7500 graphics card

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On Sun, 30 Jun 2002, Alex Deucher wrote:

>Date: Sun, 30 Jun 2002 07:43:09 -0700 (PDT)
>From: Alex Deucher <agd5f@yahoo.com>
>To: xfree86-list@redhat.com, drkirkby@ntlworld.com
>Content-Type: text/plain; charset=us-ascii
>List-Id: Red Hat XFree86 list <xfree86-list.redhat.com>
>Subject: Re: Redhat 7.3 and ATI Radeon 7500 graphics card
>
>it should work.  you might want to check the xpert ML archive at
>xfree86.org.  try setting "crt_screen" to "false" or I think there may
>even be an option for "dfp" "true" or something like that.
>
>the output of lspci has nothing to do with what adapters X supports. 
>lspci just lists all PCI devices.  As far as I know, it uses a separate
>database of PCI ID's than X uses.

That is correct.  XFree86 itself has it's own PCI database of 
supported hardware.  lspci's output displays all known hardware.

Do not assume that if lspci can identify a particular piece of
hardware, that there is any support for that hardware in the OS
or in XFree86.  Whenever we learn of new PCI device or vendor
ID's, we add them to the pcitable, so that autodetection can 
work, and the hardware can be identified to lspci, kudzu and 
other things that use the pcitable.  There is no connection 
between lspci identifying a piece of hardware, and that hardware 
being supported.

For example, ATI FireGL 8800 should be detected by lspci, however 
there is no driver support for it.  It is more beneficial to 
detect a piece of hardware and tell a user what it is, than to 
just show "unknown" because a piece of hardwaer happens to not be 
supported.  Also, once a piece of hardware does get supported, we 
don't have to update the pcitable if it already can detect that 
hardware.

Hope this helps clarify pci detection issues.


-- 
Mike A. Harris                  Shipping/mailing address:
OS Systems Engineer             190 Pittsburgh Ave., Sault Ste. Marie,
XFree86 maintainer              Ontario, Canada, P6C 5B3
Red Hat Inc.
http://www.redhat.com           ftp://people.redhat.com/mharris





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