kern/82295: i915 support is broken

[Christoph Weber-Fahr]

>Number:         82295
>Category:       kern
>Synopsis:       i915 support is broken
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 15 21:30:16 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Christoph Weber-Fahr
>Release:        FreeBSD 5.4-PRERELEASE i386
>Organization:
Arcor AG
>Environment:
System: FreeBSD tnd37.tnd.arcor.net 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #0: Wed Apr 27 19:44:28 CEST 2005 wefa at tnd37.tnd.arcor.net:/usr/obj/usr/src/sys/HPDC7100 i386

HP Compaq dc7100. It has an Intel i915 Chip set based embedded
Graphics controller.

the kernel file contains the line

device          agp

>Description:

X cant correctly support the i915 embedded graphics
controller because lacking/broken kernel facilities.

Symptom (from the X output):

  (EE) GARTInit: Unable to open /dev/agpgart (No such file or directory)
  (WW) I810(0): /dev/agpgart is either not available, or no memory is available
  for allocation.  Using pre-allocated memory only.
  (WW) I810(0): VideoRAM reduced to 7932 kByte (limited to available sysmem)

I reported this bug to the X.org folks (see [1]) and got the following 
answer:

"Although it's PCI express, there's still a GART system. Basically 
FreeBSD needs to port the Linux kernel changes for AGPGART to it's kernel."

[1] https://bugs.freedesktop.org/show_bug.cgi?id=2741

>How-To-Repeat:
	use X
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: