X goes into a loop with DRI turned on.

[Randall Smith <randall@tnr.cc>]

I've run DRI on this machine before and turned it off so that I could 
use suspend-to-disk.  I'm up to the 2.6.5 kernel.  I have an ATI 7500 
mobile Radeon card.  With DRI turned off, X starts up just fine.  When I 
turn on DRI X goes into an endless loop and my machine will not respond 
(CAPS LOCK sanity test fails).  This is from the X log:

(EE) RADEON(0): RADEONCPGetBuffer: CP start -1020
(EE) RADEON(0): RADEONCPGetBuffer: CP GetBuffer -1020
(EE) RADEON(0): GetBuffer timed out, resetting engine...
(EE) RADEON(0): RADEONCPGetBuffer: CP reset -1020
(EE) RADEON(0): RADEONCPGetBuffer: CP start -1020
(EE) RADEON(0): RADEONCPGetBuffer: CP GetBuffer -1020
(EE) RADEON(0): GetBuffer timed out, resetting engine...
(EE) RADEON(0): RADEONCPGetBuffer: CP reset -1020
(EE) RADEON(0): RADEONCPGetBuffer: CP start -1020
(EE) RADEON(0): RADEONCPGetBuffer: CP GetBuffer -1020

It goes through this loop until I power off the machine.

Below is my X config file for reference:


*********************************************************************
# XF86Config-4 (XFree86 X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the XF86Config-4 manual page.
# (Type "man XF86Config-4" at the shell prompt.)
#
# This file is automatically updated on xserver-xfree86 package upgrades 
*only*
# if it has not been modified since the last upgrade of the xserver-xfree86
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands as root:
#
#   cp /etc/X11/XF86Config-4 /etc/X11/XF86Config-4.custom
#   md5sum /etc/X11/XF86Config-4 > /var/lib/xfree86/XF86Config-4.md5sum
#   dpkg-reconfigure xserver-xfree86

Section "Files"
	FontPath	"unix/:7100"			# local font server
	# if the local font server has problems, we can fall back on these
	FontPath	"/usr/lib/X11/fonts/misc"
	FontPath	"/usr/lib/X11/fonts/cyrillic"
	FontPath	"/usr/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/Type1"
	FontPath	"/usr/lib/X11/fonts/CID"
	FontPath	"/usr/lib/X11/fonts/Speedo"
	FontPath	"/usr/lib/X11/fonts/100dpi"
	FontPath	"/usr/lib/X11/fonts/75dpi"
EndSection

Section "Module"
	Load	"GLcore"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Load	"dri"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"keyboard"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xfree86"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection

Section "Device"
	Identifier	"ATI Technologies, Inc. Radeon Mobility M7 [LW]"
	#Driver		"ati"
	Driver		"radeon"
EndSection

Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	28-50
	VertRefresh	43-75
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"ATI Technologies, Inc. Radeon Mobility M7 [LW]"
	Monitor		"Generic Monitor"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1280x1024" "1152x864" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
EndSection

Section "DRI"
	Mode	0666
EndSection
*********************************************************************


Randall